10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

[ X ]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017

or

[    ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-07434

Aflac Incorporated

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(Exact name of registrant as specified in its charter)

Georgia	58-1167100
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1932 Wynnton Road, Columbus, Georgia	31999
(Address of principal executive offices)	(ZIP Code)

706.323.3431

(Registrant's telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  þ  Yes  ¨  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).            þ  Yes  ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  þ	Accelerated filer ¨
Non-accelerated filer    ¨ (Do not check if a smaller reporting company)	Smaller reporting company  ¨
	Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  ¨  Yes  þ  No

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	April 25, 2017
Common Stock, $.10 Par Value	396,846,578

Aflac Incorporated and Subsidiaries

Quarterly Report on Form 10-Q

For the Quarter Ended March 31, 2017

Table of Contents

		Page
PART I.	FINANCIAL INFORMATION:
Item 1.	Financial Statements (Unaudited)
	Review by Independent Registered Public Accounting Firm	1
	Report of Independent Registered Public Accounting Firm	2
	Consolidated Statements of Earnings   Three Months Ended March 31, 2017, and 2016	3
	Consolidated Statements of Comprehensive Income (Loss)   Three Months Ended March 31, 2017, and 2016	4
	Consolidated Balance Sheets   March 31, 2017 and December 31, 2016	5
	Consolidated Statements of Shareholders' Equity   Three Months Ended March 31, 2017, and 2016	7
	Consolidated Statements of Cash Flows   Three Months Ended March 31, 2017, and 2016	8
	Notes to the Consolidated Financial Statements	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	61
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	88
Item 4.	Controls and Procedures	88
PART II.	OTHER INFORMATION:	89
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	89
Item 6.	Exhibits	90

Items other than those listed above are omitted because they are not required or are not applicable.

As used in this report, “we,” “our,” “us” and “Registrant” refer to Aflac Incorporated.

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

Review by Independent Registered Public Accounting Firm

The March 31, 2017, and 2016, consolidated financial statements included in this filing have been reviewed by KPMG LLP, an independent registered public accounting firm, in accordance with established professional standards and procedures for such a review.

The report of KPMG LLP commenting upon its review is included on the following page.

1

Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders

Aflac Incorporated:

We have reviewed the accompanying consolidated balance sheet of Aflac Incorporated and subsidiaries (the Company) as of March 31, 2017, and the related consolidated statements of earnings, comprehensive income (loss), shareholders' equity and cash flows for the three-month periods ended March 31, 2017 and 2016. These consolidated financial statements are the responsibility of the Company's management.

We conducted our review in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should be made to the consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of Aflac Incorporated and subsidiaries as of December 31, 2016, and the related consolidated statements of earnings, comprehensive income (loss), shareholders' equity and cash flows for the year then ended (not presented herein); and in our report dated February 24, 2017, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying consolidated balance sheet as of December 31, 2016, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ KPMG LLP

Atlanta, Georgia

May 3, 2017

2

Aflac Incorporated and Subsidiaries

Consolidated Statements of Earnings

	Three Months Ended March 31,
(In millions, except for share and per-share amounts - Unaudited)	2017			2016
Revenues:
Net premiums, principally supplemental health insurance	$	4,638			$	4,602
Net investment income	794				801
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(10		)		(14		)
Sales and redemptions	(7		)		91
Derivative and other gains (losses)	(123		)		(47		)
Total realized investment gains (losses)	(140		)		30
Other income (loss)	17				18
Total revenues	5,309				5,451
Benefits and expenses:
Benefits and claims, net	3,052				3,025
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	294				292
Insurance commissions	328				333
Insurance expenses	614				563
Interest expense	62				65
Other expenses	61				56
Total acquisition and operating expenses	1,359				1,309
Total benefits and expenses	4,411				4,334
Earnings before income taxes	898				1,117
Income taxes	306				386
Net earnings	$	592			$	731
Net earnings per share:
Basic	$	1.48			$	1.75
Diluted	1.47				1.74
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic	401,130				418,748
Diluted	404,069				420,920
Cash dividends per share	$	.43			$	.41

See the accompanying Notes to the Consolidated Financial Statements.

3

Aflac Incorporated and Subsidiaries

Consolidated Statements of Comprehensive Income (Loss)

	Three Months Ended March 31,
(In millions - Unaudited)	2017				2016
Net earnings		$	592			$	731
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period		375				689
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period		(526		)		2,689
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings		16				(77		)
Unrealized gains (losses) on derivatives during period		2				3
Pension liability adjustment during period		(2		)		(2		)
Total other comprehensive income (loss) before income taxes		(135		)		3,302
Income tax expense (benefit) related to items of other comprehensive income (loss)		(137		)		991
Other comprehensive income (loss), net of income taxes		2				2,311
Total comprehensive income (loss)		$	594			$	3,042

See the accompanying Notes to the Consolidated Financial Statements.

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Aflac Incorporated and Subsidiaries

Consolidated Balance Sheets

(In millions)	March 31, 2017 (Unaudited)			December 31, 2016
Assets:
Investments and cash:
Securities available for sale, at fair value:
Fixed maturities (amortized cost $66,118 in 2017 and $62,195 in 2016)		$	72,113		$	68,778
Fixed maturities - consolidated variable interest entities (amortized cost $4,143 in 2017 and $4,168 in 2016)		4,964			4,982
Perpetual securities (amortized cost $1,317 in 2017 and $1,269 in 2016)		1,555			1,425
Perpetual securities - consolidated variable interest entities (amortized cost $246 in 2017 and $237 in 2016)		215			208
Equity securities (cost $239 in 2017 and $231 in 2016)		271			265
Equity securities - consolidated variable interest entities (cost $1,013 in 2017 and $972 in 2016)		1,078			1,044
Securities held to maturity, at amortized cost:
Fixed maturities (fair value $40,923 in 2017 and $40,021 in 2016)		34,401			33,350
Other investments (1)		1,701			1,450
Cash and cash equivalents		4,205			4,859
Total investments and cash		120,503			116,361
Receivables		618			669
Accrued investment income		723			754
Deferred policy acquisition costs		9,255			8,993
Property and equipment, at cost less accumulated depreciation		444			433
Other (2)		2,107			2,609
Total assets		$	133,650		$	129,819

⁽¹⁾ Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

⁽²⁾ Includes $146 in 2017 and $127 in 2016 of derivatives from consolidated variable interest entities

See the accompanying Notes to the Consolidated Financial Statements.

(continued)

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Aflac Incorporated and Subsidiaries

Consolidated Balance Sheets (continued)

(In millions, except for share and per-share amounts)	March 31, 2017 (Unaudited)				December 31, 2016
Liabilities and shareholders’ equity:
Liabilities:
Policy liabilities:
Future policy benefits		$	79,624			$	76,106
Unpaid policy claims		4,230				4,045
Unearned premiums		6,825				6,916
Other policyholders’ funds		6,945				6,659
Total policy liabilities		97,624				93,726
Income taxes		5,626				5,387
Payables for return of cash collateral on loaned securities		1,482				526
Notes payable		5,250				5,360
Other (3)		3,328				4,338
Total liabilities		113,310				109,337
Commitments and contingent liabilities (Note 12)
Shareholders’ equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2017 and 2016; issued 671,683 shares in 2017 and 671,249 shares in 2016		67				67
Additional paid-in capital		2,008				1,976
Retained earnings		26,400				25,981
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(1,650		)		(1,983		)
Unrealized gains (losses) on investment securities		4,474				4,805
Unrealized gains (losses) on derivatives		(22		)		(24		)
Pension liability adjustment		(170		)		(168		)
Treasury stock, at average cost		(10,767		)		(10,172		)
Total shareholders’ equity		20,340				20,482
Total liabilities and shareholders’ equity		$	133,650			$	129,819

⁽³⁾ Includes $125 in 2017 and $146 in 2016 of derivatives from consolidated variable interest entities

See the accompanying Notes to the Consolidated Financial Statements.

6

Aflac Incorporated and Subsidiaries

Consolidated Statements of Shareholders’ Equity

	Three Months Ended March 31,
(In millions - Unaudited)		2017			2016
Common stock:
Balance, beginning of period		$	67		$	67
Balance, end of period		67			67
Additional paid-in capital:
Balance, beginning of period		1,976			1,828
Exercise of stock options		10			10
Share-based compensation		12			21
Gain (loss) on treasury stock reissued		10			7
Balance, end of period		2,008			1,866
Retained earnings:
Balance, beginning of period		25,981			24,007
Net earnings		592			731
Dividends to shareholders		(173		)	(173		)
Balance, end of period		26,400			24,565
Accumulated other comprehensive income (loss):
Balance, beginning of period		2,630			625
Unrealized foreign currency translation gains (losses) during period, net of income taxes		333			612
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments		(331		)	1,698
Unrealized gains (losses) on derivatives during period, net of income taxes		2			2
Pension liability adjustment during period, net of income taxes		(2		)	(1		)
Balance, end of period		2,632			2,936
Treasury stock:
Balance, beginning of period		(10,172		)	(8,819		)
Purchases of treasury stock		(610		)	(612		)
Cost of shares issued		15			18
Balance, end of period		(10,767		)	(9,413		)
Total shareholders’ equity		$	20,340		$	20,021

See the accompanying Notes to the Consolidated Financial Statements.

7

Aflac Incorporated and Subsidiaries

Consolidated Statements of Cash Flows

	Three Months Ended March 31,
(In millions - Unaudited)	2017				2016
Cash flows from operating activities:
Net earnings		$	592			$	731
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums		106				32
Increase in deferred policy acquisition costs		(41		)		(37		)
Increase in policy liabilities		666				919
Change in income tax liabilities		271				(367		)
Realized investment (gains) losses		140				(30		)
Other, net		23				83
Net cash provided (used) by operating activities		1,757				1,331
Cash flows from investing activities:
Proceeds from investments sold or matured:
Securities available for sale:
Fixed maturities sold		1,385				266
Fixed maturities matured or called		204				408
Perpetual securities matured or called		0				35
Equity securities sold		155				0
Securities held to maturity:
Fixed maturities matured or called		228				277
Costs of investments acquired:
Available-for-sale fixed maturities acquired		(3,726		)		(1,911		)
Available-for-sale equity securities acquired		(157		)		(364		)
Other investments, net		(203		)		(123		)
Settlement of derivatives, net		(44		)		273
Cash received (pledged or returned) as collateral, net		654				(189		)
Other, net		(23		)		(159		)
Net cash provided (used) by investing activities		(1,527		)		(1,487		)
Cash flows from financing activities:
Purchases of treasury stock		(610		)		(612		)
Proceeds from borrowings		524				0
Principal payments under debt obligations		(654		)		0
Dividends paid to shareholders		(166		)		(167		)
Change in investment-type contracts, net		18				45
Treasury stock reissued		11				7
Other, net		1				(39		)
Net cash provided (used) by financing activities		(876		)		(766		)
Effect of exchange rate changes on cash and cash equivalents		(8		)		21
Net change in cash and cash equivalents		(654		)		(901		)
Cash and cash equivalents, beginning of period		4,859				4,350
Cash and cash equivalents, end of period		$	4,205			$	3,449
Supplemental disclosures of cash flow information:
Income taxes paid		$	58			$	779
Interest paid		47				54
Noncash interest		15				12
Impairment losses included in realized investment losses		10				14
Noncash financing activities:
Capital lease obligations		2				1
Treasury stock issued for:
Associate stock bonus		6				8
Shareholder dividend reinvestment		7				6
Share-based compensation grants		1				4

See the accompanying Notes to the Consolidated Financial Statements.

8

Aflac Incorporated and Subsidiaries

Notes to the Consolidated Financial Statements

(Interim period data – Unaudited)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of Business

Aflac Incorporated (the Parent Company) and its subsidiaries (collectively, the Company) primarily sell supplemental health and life insurance in the United States and Japan. The Company's insurance business is marketed and administered through American Family Life Assurance Company of Columbus (Aflac), which operates in the United States (Aflac U.S.) and as a branch in Japan (Aflac Japan). American Family Life Assurance Company of New York (Aflac New York) is a wholly owned subsidiary of Aflac. Most of Aflac's policies are individually underwritten and marketed through independent agents. Additionally, Aflac U.S. markets and administers group products through Continental American Insurance Company (CAIC), branded as Aflac Group Insurance. Our insurance operations in the United States and our branch in Japan service the two markets for our insurance business. Aflac Japan's revenues, including realized gains and losses on its investment portfolio, accounted for 69% and 74% of the Company's total revenues in the three-month periods ended March 31, 2017, and 2016, respectively. The percentage of the Company's total assets attributable to Aflac Japan was 84% at March 31, 2017, compared with 83% at December 31, 2016.

Basis of Presentation

We prepare our financial statements in accordance with U.S. generally accepted accounting principles (GAAP). These principles are established primarily by the Financial Accounting Standards Board (FASB). In these Notes to the Consolidated Financial Statements, references to U.S. GAAP issued by the FASB are derived from the FASB Accounting Standards Codification^TM (ASC). The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates when recording transactions resulting from business operations based on currently available information. The most significant items on our balance sheet that involve a greater degree of accounting estimates and actuarial determinations subject to changes in the future are the valuation of investments and derivatives, deferred policy acquisition costs, liabilities for future policy benefits and unpaid policy claims, and income taxes. These accounting estimates and actuarial determinations are sensitive to market conditions, investment yields, mortality, morbidity, commission and other acquisition expenses, and terminations by policyholders. As additional information becomes available, or actual amounts are determinable, the recorded estimates will be revised and reflected in operating results. Although some variability is inherent in these estimates, we believe the amounts provided are adequate.

The unaudited consolidated financial statements include the accounts of the Parent Company, its subsidiaries and those entities required to be consolidated under applicable accounting standards. All material intercompany accounts and transactions have been eliminated.

In the opinion of management, the accompanying unaudited consolidated financial statements of the Company contain all adjustments, consisting of normal recurring accruals, which are necessary to fairly present the consolidated balance sheets as of March 31, 2017 and December 31, 2016, the consolidated statements of earnings and comprehensive income (loss), shareholders' equity and cash flows for the three-month periods ended March 31, 2017 and 2016. Results of operations for interim periods are not necessarily indicative of results for the entire year. As a result, these financial statements should be read in conjunction with the financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2016 (2016 Annual Report).

Reclassifications: Certain reclassifications have been made to prior-year amounts to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity.

Prior year foreign currency transaction gains and losses have been reclassified from Other income (loss) to Realized investment gains (losses) - Derivative and other gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity. This change in classification was made to reflect that the major source of our foreign currency transaction gains and losses is directly or indirectly a result of our investment activity.

9

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Consolidation - Interests Held through Related Parties That Are under Common Control: In October 2016, the FASB issued amendments which clarify the consolidation guidance on how a reporting entity that is the single decision maker of a variable interest entity (VIE) should treat indirect interests in the entity held through related parties that are under common control with the reporting entity when determining whether it is the primary beneficiary of that VIE. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting: In March 2016, the FASB issued amendments which simplify several aspects for share-based payment award transactions, including income tax consequences, classification of awards as either liability or equities, and classification on the statement of cash flows. We adopted this guidance as of January 1, 2017.

The amendment requires prospective recognition of excess tax benefits and deficiencies in the income statement, rather than in paid-in capital. As a result of applying this requirement, we believe that recognition of excess tax benefits will increase volatility in our statement of operations but the adoption of this guidance did not have a significant impact on our statement of financial position, operations, or disclosures. 

The amendment also requires all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) to be recognized as income tax expense or benefit in the income statement. The guidance requires modified retrospective transition for settlements on all outstanding awards (both historical and future) that did not give rise to an excess benefit to be recorded through retained earnings on a cumulative-effect basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Additionally, the amendment requires that the minimum statutory tax withholding for all outstanding liability awards be reclassified at the date of adoption to equity (assuming equity classification results from the guidance change), and as a cumulative-effect adjustment to equity be recorded on a modified retrospective basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

The guidance requires certain reclassifications of balances on the statement of cash flows to or from operating and financing activities. The reclassification guidance did not have a significant impact on our statement of cash flows.

The amendment allows an entity to elect whether to use estimates of forfeitures, or to account for forfeitures as they occur, using modified retrospective application. We have made an entity-wide accounting policy election to estimate the number of awards that are expected to vest (consistent with our prior policy). The election and adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Investments - Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting: In March 2016, the FASB issued amendments whicheliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. Per the amendments, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments also require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Contingent Put and Call Options in Debt Instruments: In March 2016, the FASB issued amendments which clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is

10

related to interest rates or credit risks. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships: In March 2016, the FASB issued amendments which clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria remain intact. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Financial Services - Insurance - Disclosures about Short-Duration Contracts:In May 2015, the FASB issued updated guidance requiring enhanced disclosures by all insurance entities that issue short-duration contracts. The amendments require insurance entities to disclose for annual reporting periods information about the liability for unpaid claims and claim adjustment expenses. The amendments also require insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate the liability for unpaid claims and claim adjustment expenses. In addition, the amendments require insurance entities to disclose for annual and interim reporting periods a roll-forward of the liability for unpaid claims and claim adjustment expenses. For health insurance claims, the amendments require the disclosure of the total of incurred-but-not-reported liabilities and expected development on reported claims included in the liability for unpaid claims and claim adjustment expenses. We adopted this guidance as of December 31, 2016, and have no insurance contracts classified as short-duration. The adoption of this guidance did not have a significant impact on our disclosures.

Presentation of Financial Statements - Going Concern - Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern:In August 2014, the FASB issued this amendment that provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. The new guidance requires a formal assessment of going concern by management based on criteria prescribed in the new guidance. We adopted this guidance as of December 31, 2016. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures, and no substantial doubt currently exists about the Company’s ability to continue as a going concern.

Accounting Pronouncements Pending Adoption

Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued amendments to shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount. The amendments are effective for public business entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, or disclosures.

Compensation-Retirement Benefit: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost: In March 2017, the FASB issued amendments requiring that an employer report the service cost component of net periodic pension cost and net periodic postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic pension cost and net periodic postretirement benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments in this update also allow only the service cost component to be eligible for capitalization when applicable. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

11

Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets: In February 2017, the FASB issued amendments clarifying that the accounting guidance for derecognition of nonfinancial assets does not apply to the derecognition of businesses, nonprofit activities or financial assets that meet the definition of "in substance nonfinancial assets." The new guidance defines an "in substance nonfinancial asset" to be an asset or group of assets for which substantially all of the fair value consists of nonfinancial assets and the group or subsidiary is not a business. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Earlier adoption is permitted for fiscal years beginning after December 15, 2016, including interim periods therein. An entity is required to apply the amendments at the same time that it applies the FASB amendments for Revenue from Contracts with Customers. We are evaluating the impact of adoption of this guidance on our financial position, results of operations, disclosures, and statements of cash flows.

Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment: In January 2017, the FASB issued amendments simplifying the subsequent measurement of goodwill. An entity, under this update, is no longer required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, the entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The amendments are effective for public business entities that are U.S. SEC filers for annual or any interim goodwill impairment tests in fiscal years beginning after Dec. 15, 2019. Early adoption is permitted for any goodwill impairment tests performed on testing dates after January 1, 2017. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Business Combinations - Clarifying the Definition of a Business: In January 2017, the FASB issued amendments clarifying when a set of assets and activities is a business. The amendments provide a screen to determine when a set of assets and activities is not a business. The amendments are effective for public business entities beginning after December 15, 2017, including interim periods within those periods. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Statement of Cash Flows - Restricted Cash: In November 2016, the FASB issued amendments requiring that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, disclosures or statement of cash flows.

Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory: In October 2016, the FASB issued amendments that require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments are effective for public business entities for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted. We are evaluating the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments: In August 2016, the FASB issued amendments that provide guidance on eight specific statement of cash flows classification issues. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted for any interim or annual period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

12

Financial Instruments - Credit Losses - Measurement of Credit Losses on Financial Instruments: In June 2016, the FASB issued amendments that require a financial asset (or a group of financial assets) measured on an amortized cost basis to be presented net of an allowance for credit losses in order to reflect the amount expected to be collected on the financial asset(s). The measurement of expected credit losses is amended by replacing the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform about a credit loss. Credit losses on available-for-sale debt securities will continue to be measured in a manner similar to current U.S. GAAP. However, the amendments require that credit losses be presented as an allowance rather than as a writedown. Other amendments include changes to the balance sheet presentation and interest income recognition of purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. The amendments are effective for public companies for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Companies may early adopt this guidance as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, loans and loan receivables and reinsurance recoverables (See Notes 3 and 7 for current balances of instruments in scope). We are continuing to evaluate the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Leases: In February 2016, the FASB issued updated guidance for accounting for leases. Per the amendments, lessees will be required to recognize all leases on the balance sheet, with the exception of short-term leases. A lease liability will be recorded for the obligation of a lessee to make lease payments arising from a lease. A right-of-use asset, will be recorded which represents the lessee’s right to use, or to control the use of, a specified asset for a lease term. Under the new guidance, lessor accounting is largely unchanged. The amendments are effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We have identified certain operating leases in scope of this guidance to include office space and equipment leases (See Note 15 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for current balances of leases in scope). The leases within scope of this guidance will increase our right-of-use assets recorded on our financial position, however we estimate leases within scope of the guidance to represent less than 1% of our total assets as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

Financial Instruments - Overall - Recognition and Measurement of Financial Assets and Financial Liabilities: In January 2016, the FASB issued guidance to address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The main provisions require that equity investments be measured at fair value with changes recognized in net income; that changes in instrument-specific credit risk for financial liabilities that are measured under the fair value option be recognized in other comprehensive income; and that entities would make the assessment of the ability to realize a deferred tax asset (DTA) related to an available-for-sale (AFS) debt security in combination with the entity's other DTAs. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is not permitted, with the exception of the own credit provision if an entity has elected to measure a liability at fair value. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, perpetual securities and equity securities (See Note 3 for current balances of instruments in scope). We estimate that the impact of this guidance will increase volatility in our statement of operations and we are continuing to evaluate the impact of this guidance on our statement of financial position, operations and disclosures.

Revenue from Contracts with Customers: In May 2014, the FASB issued updated guidance that affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g., insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB deferred the effective date for this standard to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods. We have identified revenue in scope of this guidance to include certain revenues associated with affiliated entities in support of our operations. We estimate the revenue within scope of the guidance to represent less than 1% of our total revenues as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

13

Recent accounting guidance not discussed above is not applicable, did not have, or is not expected to have a material impact to our business. 

For additional information on new accounting pronouncements and recent accounting guidance and their impact, if any, on our financial position or results of operations, see Note 1 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

2. BUSINESS SEGMENT INFORMATION

The Company consists of two reportable insurance business segments: Aflac Japan and Aflac U.S., both of which sell supplemental health and life insurance. Operating business segments that are not individually reportable and business activities, including reinsurance retrocession activities, not included in Aflac Japan or Aflac U.S. are included in the "Other business segments" category.

We do not allocate corporate overhead expenses to business segments. Consistent with U.S. GAAP accounting guidance for segment reporting, we evaluate and manage our business segments using a financial performance measure called pretax operating earnings. Our definition of operating earnings includes interest cash flows associated with notes payable and hedge costs related to foreign currency denominated investments, but excludes certain items that cannot be predicted or that are outside of management's control, such as realized investment gains and losses from securities transactions, impairments, and certain derivative and foreign currency activities; nonrecurring items; and other non-operating income (loss) from net earnings. Nonrecurring and other non-operating items consist of infrequent events and activity not associated with the normal course of the Company’s insurance operations and do not reflect Aflac’s underlying business performance. We exclude income taxes related to operations to arrive at pretax operating earnings. Information regarding operations by segment follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Revenues:
Aflac Japan:
Net earned premiums	$	3,194		$	3,179
Net investment income, less amortized hedge costs (1)	557			590
Other income	10			8
Total Aflac Japan	3,761			3,777
Aflac U.S.:
Net earned premiums	1,390			1,367
Net investment income	178			174
Other income	1			3
Total Aflac U.S.	1,569			1,544
Other business segments	67			65
Total business segment revenues	5,397			5,386
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Corporate	87			67
Intercompany eliminations and other	(66		)	(42		)
Total revenues	$	5,309		$	5,451

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total revenues.

14

	Three Months Ended March 31,
(In millions)	2017			2016
Pretax earnings:
Aflac Japan (1)	$	769		$	806
Aflac U.S.	310			332
Other business segments	0			3
Total business segment pretax operating earnings	1,079			1,141
Interest expense, noninsurance operations	(29		)	(29		)
Corporate and eliminations	(23		)	(35		)
Pretax operating earnings	1,027			1,077
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Other non-operating income (loss) (3)	(20		)	0
Total earnings before income taxes	$	898		$	1,117
Income taxes applicable to pretax operating earnings	$	351		$	372
Effect of foreign currency translation on after-tax operating earnings	5			13

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from pretax operating earnings when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total earnings before income taxes.

Assets were as follows:

(In millions)	March 31, 2017				December 31, 2016
Assets:
Aflac Japan		$	112,023			$	107,858
Aflac U.S.		19,817				19,453
Other business segments		338				270
Total business segment assets		132,178				127,581
Corporate		26,024				26,476
Intercompany eliminations		(24,552		)		(24,238		)
Total assets		$	133,650			$	129,819

15

3. INVESTMENTS

Investment Holdings

The amortized cost for our investments in debt and perpetual securities, the cost for equity securities and the fair values of these investments are shown in the following tables.

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	26,311		$	3,203		$	366		$	29,148
Municipalities		281			26			12			295
Mortgage- and asset-backed securities		272			32			0			304
Public utilities		1,637			324			6			1,955
Sovereign and supranational		846			133			6			973
Banks/financial institutions		3,039			414			83			3,370
Other corporate		3,429			596			16			4,009
Total yen-denominated		35,815			4,728			489			40,054
U.S. dollar-denominated:
U.S. government and agencies		161			11			0			172
Municipalities		901			133			7			1,027
Mortgage- and asset-backed securities		184			16			0			200
Public utilities		5,296			669			77			5,888
Sovereign and supranational		326			87			0			413
Banks/financial institutions		2,680			513			18			3,175
Other corporate		24,898			1,972			722			26,148
Total U.S. dollar-denominated		34,446			3,401			824			37,023
Total fixed maturities		70,261			8,129			1,313			77,077
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,315			208			50			1,473
Other corporate		196			23			0			219
U.S. dollar-denominated:
Banks/financial institutions		52			26			0			78
Total perpetual securities		1,563			257			50			1,770
Equity securities:
Yen-denominated		668			63			10			721
U.S. dollar-denominated		584			55			11			628
Total equity securities		1,252			118			21			1,349
Total securities available for sale		$	73,076		$	8,504		$	1,384		$	80,196

16

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	21,493		$	5,114		$	0		$	26,607
Municipalities		363			104			0			467
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,324			376			7			3,693
Sovereign and supranational		2,702			307			0			3,009
Banks/financial institutions		3,650			204			24			3,830
Other corporate		2,839			446			0			3,285
Total yen-denominated		34,401			6,553			31			40,923
Total securities held to maturity		$	34,401		$	6,553		$	31		$	40,923

17

	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	22,857		$	3,359		$	160		$	26,056
Municipalities		246			29			8			267
Mortgage- and asset-backed securities		1,096			33			8			1,121
Public utilities		1,533			318			3			1,848
Sovereign and supranational		862			186			5			1,043
Banks/financial institutions		2,673			403			74			3,002
Other corporate		3,192			623			3			3,812
Total yen-denominated		32,459			4,951			261			37,149
U.S dollar-denominated:
U.S. government and agencies		148			10			0			158
Municipalities		894			142			8			1,028
Mortgage- and asset-backed securities		196			20			0			216
Public utilities		5,205			690			60			5,835
Sovereign and supranational		335			91			0			426
Banks/financial institutions		2,570			507			16			3,061
Other corporate		24,556			2,021			690			25,887
Total U.S. dollar-denominated		33,904			3,481			774			36,611
Total fixed maturities		66,363			8,432			1,035			73,760
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,266			128			49			1,345
Other corporate		189			24			0			213
U.S. dollar-denominated:
Banks/financial institutions		51			24			0			75
Total perpetual securities		1,506			176			49			1,633
Equity securities:
Yen-denominated		624			83			2			705
U.S. dollar-denominated		579			31			6			604
Total equity securities		1,203			114			8			1,309
Total securities available for sale		$	69,072		$	8,722		$	1,092		$	76,702

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	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	20,702		$	5,338		$	0		$	26,040
Municipalities		350			107			0			457
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,201			358			23			3,536
Sovereign and supranational		2,602			283			8			2,877
Banks/financial institutions		3,731			195			26			3,900
Other corporate		2,734			452			7			3,179
Total yen-denominated		33,350			6,735			64			40,021
Total securities held to maturity		$	33,350		$	6,735		$	64		$	40,021

The methods of determining the fair values of our investments in fixed-maturity securities, perpetual securities and equity securities are described in Note 5.

During the first three months of 2017 and 2016, respectively, we did not reclassify any investments from the held-to-maturity category to the available-for-sale category.

Contractual and Economic Maturities

The contractual maturities of our investments in fixed maturities at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Available for sale:
Due in one year or less		$	145		$	161		$	74		$	77
Due after one year through five years		3,561			3,788			664			716
Due after five years through 10 years		9,846			10,093			3,128			3,324
Due after 10 years		43,392			48,447			8,462			9,421
Mortgage- and asset-backed securities		316			361			43			47
Total fixed maturities available for sale		$	57,260		$	62,850		$	12,371		$	13,585
Held to maturity:
Due after one year through five years		$	2,086		$	2,193		$	0		$	0
Due after five years through 10 years		1,645			1,813			0			0
Due after 10 years		30,640			36,884			0			0
Mortgage- and asset-backed securities		30			33			0			0
Total fixed maturities held to maturity		$	34,401		$	40,923		$	0		$	0

At March 31, 2017, the Parent Company and other business segments had portfolios of available-for-sale fixed-maturity securities totaling $630 million at amortized cost and $642 million at fair value, which are not included in the table above.

Expected maturities may differ from contractual maturities because some issuers have the right to call or prepay obligations with or without call or prepayment penalties.

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The majority of our perpetual securities are subordinated to other debt obligations of the issuer, but rank higher than the issuer's equity securities. Perpetual securities have characteristics of both debt and equity investments, along with unique features that create economic maturity dates for the securities. Although perpetual securities have no contractual maturity date, they have stated interest coupons that were fixed at their issuance and subsequently change to a floating short-term interest rate after some period of time. The instruments are generally callable by the issuer at the time of changing from a fixed coupon rate to a new variable rate of interest, which is determined by the combination of some market index plus a fixed amount of basis points. The net effect is to create an expected maturity date for the instrument. The economic maturities of our investments in perpetual securities, which were all reported as available for sale at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Due in one year or less		$	90		$	87		$	0		$	0
Due after one year through five years		196			219			0			0
Due after 10 years		1,238			1,407			39			57
Total perpetual securities available for sale		$	1,524		$	1,713		$	39		$	57

Investment Concentrations

Our process for investing in credit-related investments begins with an independent approach to underwriting each issuer's fundamental credit quality. We evaluate independently those factors which we believe could influence an issuer's ability to make payments under the contractual terms of our instruments. This includes a thorough analysis of a variety of items including the issuer's country of domicile (including political, legal, and financial considerations); the industry in which the issuer competes (with an analysis of industry structure, end-market dynamics, and regulation); company specific issues (such as management, assets, earnings, cash generation, and capital needs); and contractual provisions of the instrument (such as financial covenants and position in the capital structure). We further evaluate the investment considering broad business and portfolio management objectives, including asset/liability needs, portfolio diversification, and expected income.

Investment exposures that individually exceeded 10% of shareholders' equity were as follows:

	March 31, 2017			December 31, 2016
(In millions)	Credit Rating	Amortized Cost	Fair Value	Credit Rating	Amortized Cost	Fair Value
Japan National Government(1)	A	$47,131	$54,971	A	$42,931	$51,345

⁽¹⁾Japan Government Bonds (JGBs) or JGB-backed securities

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Realized Investment Gains and Losses

Information regarding pretax realized gains and losses from investments is as follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Realized investment gains (losses):
Fixed maturities:
Available for sale:
Gross gains from sales	$	12		$	2
Gross losses from sales(1)	(15		)	(4		)
Net gains (losses) from redemptions(1)	(29		)	83
Other-than-temporary impairment losses(1)	(4		)	(12		)
Total fixed maturities	(36		)	69
Perpetual securities:
Available for sale:
Net gains (losses) from redemptions	0			10			(1)
Other-than-temporary impairment losses	0			(2		)	(1)
Total perpetual securities	0			8
Equity securities:
Net gains (losses) from redemptions	25			0
Other-than-temporary impairment losses	(6		)	0
Total equity securities	19			0
Derivatives and other:
Derivative gains (losses)	(52		)	(4		)
Foreign currency gains (losses)	(71		)	(43		)
Total derivatives and other	(123		)	(47		)
Total realized investment gains (losses)	$	(140	)	$	30

⁽¹⁾ Primarily driven by foreign exchange

Unrealized Investment Gains and Losses

Effect on Shareholders’ Equity

The net effect on shareholders’ equity of unrealized gains and losses from investment securities was as follows:

(In millions)	March 31, 2017				December 31, 2016
Unrealized gains (losses) on securities available for sale		$	7,120			$	7,630
Deferred income taxes		(2,646		)		(2,825		)
Shareholders’ equity, unrealized gains (losses) on investment securities		$	4,474			$	4,805

Gross Unrealized Loss Aging

The following tables show the fair values and gross unrealized losses of our available-for-sale and held-to-maturity investments that were in an unrealized loss position, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position.

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	March 31, 2017
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	5,940		$	366		$	5,940		$	366		$	0		$	0
Municipalities:
U.S. dollar-denominated		45			7			0			0			45			7
Yen-denominated		132			12			132			12			0			0
Public utilities:
U.S. dollar-denominated		1,642			77			1,124			37			518			40
Yen-denominated		325			13			127			6			198			7
Sovereign and supranational:
Yen-denominated		39			6			39			6			0			0
Banks/financial institutions:
U.S. dollar-denominated		390			18			309			6			81			12
Yen-denominated		1,531			107			646			34			885			73
Other corporate:
U.S. dollar-denominated		10,690			722			7,046			272			3,644			450
Yen-denominated		415			16			415			16			0			0
Total fixed maturities		21,149			1,344			15,778			755			5,371			589
Perpetual securities:
Yen-denominated		409			50			0			0			409			50
Total perpetual securities		409			50			0			0			409			50
Equity securities:
U.S. dollar-denominated		131			11			117			8			14			3
Yen-denominated		208			10			172			5			36			5
Total equity securities		339			21			289			13			50			8
Total		$	21,897		$	1,415		$	16,067		$	768		$	5,830		$	647

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	December 31, 2016
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	3,958		$	160		$	3,958		$	160		$	0		$	0
Municipalities:
U.S. dollar-denominated		44			8			0			0			44			8
Yen-denominated		105			8			105			8			0			0
Mortgage- and asset- backed securities:
Yen-denominated		713			8			713			8			0			0
Public utilities:
U.S. dollar-denominated		1,265			60			790			32			475			28
Yen-denominated		635			26			347			14			288			12
Sovereign and supranational:
Yen-denominated		244			13			38			5			206			8
Banks/financial institutions:
U.S. dollar-denominated		268			16			238			10			30			6
Yen-denominated		1,521			100			636			19			885			81
Other corporate:
U.S. dollar-denominated		10,462			690			7,252			346			3,210			344
Yen-denominated		321			10			321			10			0			0
Total fixed maturities		19,536			1,099			14,398			612			5,138			487
Perpetual securities:
Yen-denominated		479			49			85			1			394			48
Total perpetual securities		479			49			85			1			394			48
Equity securities:
U.S. dollar-denominated		211			6			211			6			0			0
Yen-denominated		49			2			49			2			0			0
Total equity securities		260			8			260			8			0			0
Total		$	20,275		$	1,156		$	14,743		$	621		$	5,532		$	535

Analysis of Securities in Unrealized Loss Positions

The unrealized losses on our fixed maturity or perpetual securities investments have been primarily related to general market changes in interest rates, foreign exchange rates, and/or the levels of credit spreads rather than specific concerns with the issuer's ability to pay interest and repay principal. The unrealized losses on our investments in equity securities are primarily related to foreign exchange rates, general market conditions which reflect prospects for the economy as a whole, or specific information pertaining to an industry or an individual company.

For any significant declines in fair value of our fixed income or perpetual securities, we perform a more focused review of the related issuers' credit profile. For corporate issuers, we evaluate their assets, business profile including industry dynamics and competitive positioning, financial statements and other available financial data. For non-corporate issuers, we analyze all sources of credit support, including issuer-specific factors. We utilize information available in the public domain and, for certain private placement issuers, from consultations with the issuers directly. We also consider ratings from Nationally Recognized Statistical Rating Organizations (NRSROs), as well as the specific characteristics of the security we own including seniority in the issuer's capital structure, covenant predictions, or other relevant features. From

23

these reviews, we evaluate the issuers' continued ability to service our investment through payment of interest and principal.

For any significant declines in fair value of our equity securities, we review the severity of the security’s decline in fair value coupled with the length of time the fair value of the security has been below cost. We also perform a more focused review of the financial condition and near-term prospects of the issuer as well as general market conditions reflecting the prospects for the economy as a whole, and determine whether we have the intent to hold the securities until they recover in value.

Assuming no credit-related factors develop, unrealized gains and losses on fixed maturities and perpetual securities are expected to diminish as investments near maturity. Based on our credit analysis, we believe that the issuers of our fixed maturity and perpetual security investments in the sectors shown in the table above have the ability to service their obligations to us.

Other Investments

The table below reflects the composition of the carrying value for other investments as of the periods presented.

(In millions)	March 31, 2017			December 31, 2016
Other investments:
Commercial mortgage loans		$	870		$	855
Middle market loans		439			319
Short-term investments		141			89
Policy loans		197			184
Other		54			3
Total other investments		$	1,701		$	1,450

Loans and Loan Receivables

We classify our commercial mortgage loans (CMLs) and middle market loans (MMLs) as held-for-investment and include them in the other investments line on the consolidated balance sheets. We carry them on the balance sheet at amortized cost less an estimated allowance for loan losses. Our loan allowance for losses is established using both specific and general allowances. The specific allowance is used on an individual loan basis for those impaired loans where we expect to incur a loss. The general allowance is used for loans grouped by similar risk characteristics where a loan-specific or market-specific risk has not been identified, but for which we anticipate to incur a loss. As of March 31, 2017 and December 31, 2016, our allowance for loan losses was $4 million and $3 million, respectively. As of March 31, 2017 and December 31, 2016, we had no loans that were past due in regards to principal and/or interest payments. Additionally, we held no loans that were on nonaccrual status or considered impaired as of March 31, 2017 and December 31, 2016. We had no troubled debt restructurings during the three months ended March 31, 2017 and 2016.

Middle Market Loans

The carrying value for middle market loans included an unfunded amount of $135 million and $91 million, as of March 31, 2017, and December 31, 2016, respectively, that is reflected in other liabilities on the consolidated balance sheets.

As of March 31, 2017, we had commitments of $658 million to fund potential future loan originations related to this investment program, inclusive of loans held in unit trust structures. These commitments are contingent upon the availability of middle market loans that meet our underwriting criteria.

Commercial Mortgage Loans

As of March 31, 2017, we had $18 million in outstanding commitments to fund commercial mortgage loans, inclusive of loans held in unit trust structures. These commitments are contingent on the final underwriting and due diligence to be performed.

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Variable Interest Entities (VIEs)

As a condition of our involvement or investment in a VIE, we enter into certain protective rights and covenants that preclude changes in the structure of the VIE that would alter the creditworthiness of our investment or our beneficial interest in the VIE.

For those VIEs other than certain unit trust structures, our involvement is passive in nature. We are not, nor have we been, required to purchase any securities issued in the future by these VIEs.

Our ownership interest in VIEs is limited to holding the obligations issued by them. We have no direct or contingent obligations to fund the limited activities of these VIEs, nor do we have any direct or indirect financial guarantees related to the limited activities of these VIEs. We have not provided any assistance or any other type of financing support to any of the VIEs we invest in, nor do we have any intention to do so in the future. For those VIEs in which we hold debt obligations, the weighted-average lives of our notes are very similar to the underlying collateral held by these VIEs where applicable.

We also utilize unit trust structures in our Aflac Japan segment to invest in various asset classes. As the sole investor of these VIEs, we are required to consolidate these entities under U.S. GAAP.

Our risk of loss related to our interests in any of our VIEs is limited to the carrying value of the related investments held in the VIE.

VIEs - Consolidated

The following table presents the cost or amortized cost, fair value and balance sheet caption in which the assets and liabilities of consolidated VIEs are reported.

Investments in Consolidated Variable Interest Entities

	March 31, 2017						December 31, 2016
(In millions)	Cost or Amortized Cost			Fair Value			Cost or Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,143		$	4,964		$	4,168		$	4,982
Perpetual securities, available for sale		246			215			237			208
Equity securities		1,013			1,078			972			1,044
Other investments (1)		926			906			819			789
Other assets (2)		146			146			127			127
Total assets of consolidated VIEs		$	6,474		$	7,309		$	6,323		$	7,150
Liabilities:
Other liabilities (2)		$	125		$	125		$	146		$	146
Total liabilities of consolidated VIEs		$	125		$	125		$	146		$	146

⁽¹⁾ Consists of CMLs and MMLs

⁽²⁾ Consist entirely of derivatives

We are substantively the only investor in the consolidated VIEs listed in the table above. As the sole investor in these VIEs, we have the power to direct the activities of a variable interest entity that most significantly impact the entity's economic performance and are therefore considered to be the primary beneficiary of the VIEs that we consolidate. We also participate in substantially all of the variability created by these VIEs. The activities of these VIEs are limited to holding invested assets and foreign currency, and/or credit default swaps (CDS), as appropriate, and utilizing the cash flows from these securities to service our investment. Neither we nor any of our creditors are able to obtain the underlying collateral of the VIEs unless there is an event of default or other specified event. For those VIEs that contain a swap, we are not a direct counterparty to the swap contracts and have no control over them. Our loss exposure to these VIEs is limited to our original investment. Our consolidated VIEs do not rely on outside or ongoing sources of funding to support their activities beyond the underlying collateral and swap contracts, if applicable. With the exception of our investment in unit trust structures, the underlying collateral assets and funding of our consolidated VIEs are generally static in nature

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and the underlying collateral and the reference corporate entities covered by any CDS contracts were all investment grade at the time of issuance.

Investments in Unit Trust Structures

We invest through unit trust structures in yen-denominated public equity securities, U.S. dollar-denominated public equity securities, bank loans, commercial mortgage loans, infrastructure debt, and middle market loans in which we are the only investor, requiring us to consolidate these trusts under U.S. GAAP. The yen-denominated and U.S. dollar-denominated equity securities, bank loans and certain infrastructure debt are classified as available-for-sale in the financial statements. The commercial mortgage loans, middle market loans and certain infrastructure debt that meets the criteria to be classified as a loan are classified as loans held for investment and reflected in other investments on the consolidated balance sheets at amortized cost.

VIEs-Not Consolidated

The table below reflects the amortized cost, fair value and balance sheet caption in which our investment in VIEs not consolidated are reported.

Investments in Variable Interest Entities Not Consolidated

	March 31, 2017						December 31, 2016
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,823		$	5,354		$	4,729		$	5,261
Perpetual securities, available for sale		178			230			172			200
Fixed maturities, held to maturity		2,660			3,039			2,563			2,948
Other investments		52			52			1			1
Total investments in VIEs not consolidated		$	7,713		$	8,675		$	7,465		$	8,410

The VIEs that we are not required to consolidate are investments that are in the form of debt obligations from the VIEs that are irrevocably and unconditionally guaranteed by their corporate parents or sponsors. These VIEs are the primary financing vehicles used by their corporate sponsors to raise financing in the capital markets. The variable interests created by these VIEs are principally or solely a result of the debt instruments issued by them. We do not have the power to direct the activities that most significantly impact the entity's economic performance, nor do we have the obligation to absorb losses of the entity or the right to receive benefits from the entity. As such, we are not the primary beneficiary of these VIEs and are therefore not required to consolidate them. These VIE investments comprise securities from 149 separate issuers with an average credit rating of BBB as of March 31, 2017, compared with 145 separate issuers with an average credit rating of BBB as of December 31, 2016.

Securities Lending and Pledged Securities

We lend fixed-maturity securities to financial institutions in short-term security-lending transactions. These short-term security-lending arrangements increase investment income with minimal risk. Our security lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be 102% or more of the fair value of the loaned securities. These securities continue to be carried as investment assets on our balance sheet during the terms of the loans and are not reported as sales. We receive cash or other securities as collateral for such loans. For loans involving unrestricted cash or securities as collateral, the collateral is reported as an asset with a corresponding liability for the return of the collateral.

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Details of our securities lending activities were as follows:

Securities Lending Transactions Accounted for as Secured Borrowings
March 31, 2017
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Japan government and agencies	$	0	$	885	$	885
Public utilities	87		0		87
Banks/financial institutions	38		0		38
Other corporate	472		0		472
Total borrowings	$	597	$	885	$	1,482
Gross amount of recognized liabilities for securities lending transactions					$	1,482
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

Securities Lending Transactions Accounted for as Secured Borrowings
December 31, 2016
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Public utilities	$	62	$	0	$	62
Banks/financial institutions	34		0		34
Other corporate	430		0		430
Total borrowings	$	526	$	0	$	526
Gross amount of recognized liabilities for securities lending transactions					$	526
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

We did not have any repurchase agreements or repurchase-to-maturity transactions outstanding as of March 31, 2017 and December 31, 2016, respectively.

Certain fixed-maturity securities can be pledged as collateral as part of derivative transactions, or pledged to support state deposit requirements or certain investment programs. For additional information regarding pledged securities related to derivative transactions, see Note 4.

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4. DERIVATIVE INSTRUMENTS

Our freestanding derivative financial instruments have historically consisted of: (1) foreign currency swaps and credit default swaps that are associated with investments in special-purpose entities, including VIEs where we are the primary beneficiary; (2) foreign currency forwards and options used in hedging foreign exchange risk on U.S. dollar-denominated investments in Aflac Japan's portfolio; (3) foreign currency forwards and options used to hedge foreign exchange risk from our net investment in Aflac Japan and economically hedge certain portions of forecasted cash flows denominated in yen; (4) swaps associated with our notes payable, consisting of cross-currency interest rate swaps, also referred to as foreign currency swaps, associated with certain senior notes and our subordinated debentures; and (5) options on interest rate swaps (or interest rate swaptions) and futures used to hedge interest rate risk for certain available-for-sale securities. We do not use derivative financial instruments for trading purposes, nor do we engage in leveraged derivative transactions. Some of our derivatives are designated as cash flow hedges, fair value hedges or net investment hedges; however, other derivatives do not qualify for hedge accounting or we elect not to designate them as an accounting hedge. We utilize a net investment hedge to mitigate foreign exchange exposure resulting from our net investment in Aflac Japan. In addition to designating derivatives as hedging instruments, we have designated the majority of the Parent Company's yen-denominated liabilities (notes payable and loans) as nonderivative hedging instruments for this net investment hedge.

Derivative Types

We enter into foreign currency swaps pursuant to which we exchange an initial principal amount in one currency for an initial principal amount of another currency, with an agreement to re-exchange the currencies at a future date at an agreed upon exchange rate. There may also be periodic exchanges of payments at specified intervals based on the agreed upon rates and notional amounts. Foreign currency swaps are used primarily in the consolidated VIEs in our Aflac Japan portfolio to convert foreign-denominated cash flows to yen, the functional currency of Aflac Japan, in order to minimize cash flow fluctuations. We also use foreign currency swaps to economically convert certain of our U.S. dollar-denominated senior note and subordinated debenture principal and interest obligations into yen-denominated obligations.

Foreign currency forwards and options are executed for the Aflac Japan segment in order to hedge the currency risk on the carrying value of certain U.S. dollar-denominated investments. The average maturity of these forwards and options can change depending on factors such as market conditions and types of investments being held. In forward transactions, Aflac Japan agrees with another party to buy a fixed amount of yen and sell a corresponding amount of U.S. dollars at a specified future date. Aflac Japan also executes foreign currency option transactions in a collar strategy, where Aflac Japan agrees with another party to simultaneously purchase a fixed amount of U.S. dollar put options and sell U.S. dollar call options. The combination of these two actions results in no net premium being paid (i.e. a costless or zero-cost collar). The foreign currency forwards and options are used in fair value hedging relationships to mitigate the foreign exchange risk associated with U.S. dollar-denominated investments supporting yen-denominated liabilities.

Foreign currency forwards and options are also used to hedge the currency risk associated with the net investment in Aflac Japan. In these forward transactions, Aflac agrees with another party to buy a fixed amount of U.S. dollars and sell a corresponding amount of yen at a specified future date. In the option transactions, we use a combination of foreign currency options to protect expected future cash flows by simultaneously purchasing yen put options (options that protect against a weakening yen) and selling yen call options (options that limit participation in a strengthening yen). The combination of these two actions results in no net premium being paid (i.e. a costless or zero-cost collar).

The only CDS that we currently hold relates to components of an investment in a VIE and is used to assume credit risk related to an individual security. This CDS contract entitles the consolidated VIE to receive periodic fees in exchange for an obligation to compensate the derivative counterparties should the referenced security issuer experience a credit event, as defined in the contract.

Interest rate swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Typically, at the time a swap is entered into, the cash flow streams exchanged by the counterparties are equal in value. No cash or principal payments are exchanged at the inception of the contract. Interest rate swaps are primarily used to convert interest receipts on floating-rate fixed-maturity securities contracts to fixed rates. These derivatives are predominantly used to better match cash receipts from assets with cash disbursements required to fund liabilities.

Interest rate swaptions are options on interest rate swaps. Interest rate collars are combinations of two swaption positions and are executed in order to hedge certain U.S. dollar-denominated available-for-sale securities that are held in the Aflac Japan segment. We use collars to protect against significant changes in the fair value associated with our U.S. dollar-denominated available-for-sale securities due to interest rates. In order to maximize the efficiency of the collars

28

while minimizing cost, we set the strike price on each collar so that the premium paid for the ‘payer leg’ is offset by the premium received for having sold the ‘receiver leg.'

Periodically, we may enter into other derivative transactions depending on general economic conditions.

Derivative Balance Sheet Classification

The tables below summarize the balance sheet classification of our derivative fair value amounts, as well as the gross asset and liability fair value amounts. The fair value amounts presented do not include income accruals. The notional amount of derivative contracts represents the basis upon which pay or receive amounts are calculated and are not reflective of exposure or credit risk.

		March 31, 2017										December 31, 2016
(In millions)				Asset Derivatives			Liability Derivatives							Asset Derivatives			Liability Derivatives
Hedge Designation/ Derivative Type	Notional Amount			Fair Value			Fair Value				Notional Amount			Fair Value			Fair Value
Cash flow hedges:
Foreign currency swaps		$	75		$	0		$	(6	)		$	75		$	0		$	(10	)
Total cash flow hedges		75			0			(6		)		75			0			(10		)
Fair value hedges:
Foreign currency forwards		9,705			10			(428		)		10,965			0			(759		)
Foreign currency options		5,560			5			(4		)		4,224			2			(32		)
Total fair value hedges		15,265			15			(432		)		15,189			2			(791		)
Net investment hedge:
Foreign currency forwards		236			0			(4		)		209			5			(2		)
Foreign currency options		924			20			(18		)		843			41			(17		)
Total net investment hedge		1,160			20			(22		)		1,052			46			(19		)
Non-qualifying strategies:
Foreign currency swaps		5,890			318			(218		)		6,266			490			(220		)
Foreign currency forwards		11,972			225			(421		)		21,218			667			(956		)
Foreign currency options		0			0			0				41			0			(2		)
Credit default swaps		89			2			0				86			2			0
Total non-qualifying strategies		17,951			545			(639		)		27,611			1,159			(1,178		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)
Balance Sheet Location
Other assets		$	14,115		$	580		$	0			$	18,329		$	1,207		$	0
Other liabilities		20,336			0			(1,099		)		25,598			0			(1,998		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

Cash Flow Hedges

Certain of our consolidated VIEs have foreign currency swaps that qualify for hedge accounting treatment. For those that have qualified, we have designated the derivative as a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset (“cash flow” hedge). We expect to continue this hedging activity for a weighted-average period of approximately nine years. The remaining derivatives in our consolidated VIEs that have not qualified for hedge accounting are included in “non-qualifying strategies.”

Fair Value Hedges

We designate and account for certain foreign currency forwards and options as fair value hedges when they meet the requirements for hedge accounting. These foreign currency forwards and options hedge the foreign currency exposure of certain U.S. dollar-denominated investments. We recognize gains and losses on these derivatives and the related hedged items in current earnings within derivative and other gains (losses). The change in the fair value of the foreign currency

29

forwards related to the changes in the difference between the spot rate and the forward price is excluded from the assessment of hedge effectiveness. The change in fair value of the foreign currency option related to the time value of the option is excluded from the assessment of hedge effectiveness.

We designate and account for interest rate swaptions as fair value hedges when they meet the requirements for hedge accounting. These interest rate swaptions hedge the interest rate exposure of certain U.S. dollar-denominated fixed maturity securities within the investment portfolio of our Aflac Japan segment. We recognize gains and losses on these derivatives and the related hedged items in current earnings within derivative and other gains (losses). The change in the fair value of the interest rate swaptions related to the time value of the option is excluded from the assessment of hedge effectiveness.

The following table presents the gains and losses on derivatives and the related hedged items in fair value hedges.

Fair Value Hedging Relationships

(In millions)		Hedging Derivatives								Hedged Items
Hedging Derivatives	Hedged Items	Total Gains (Losses)			Gains (Losses) Excluded from Effectiveness Testing			Gains (Losses) Included in Effectiveness Testing		Gains (Losses)			Ineffectiveness Recognized for Fair Value Hedge
Three Months Ended March 31, 2017:
Foreign currency forwards	Fixed-maturity and equity securities	$	341		$	(48	)	$	389	$	(372	)	$	17
Foreign currency options	Fixed-maturity securities	24			13			11		(10		)	1
Three Months Ended March 31, 2016:
Foreign currency forwards	Fixed-maturity securities	$	857		$	(44	)	$	901	$	(882	)	$	19
Foreign currency options	Fixed-maturity securities	(1		)	(1		)	0		0			0

Net Investment Hedge

Our investment in Aflac Japan is affected by changes in the yen/dollar exchange rate. To mitigate this exposure, we have designated the Parent Company's yen-denominated liabilities (see Note 8) as non-derivative hedges and designated foreign currency forwards and options as derivative hedges of the foreign currency exposure of our net investment in Aflac Japan.

As of March 31, 2017, we had foreign exchange forwards and options as part of a hedge on 130.1 billion yen of future profit repatriation from Aflac Japan.

Our net investment hedge was effective during the three-month periods ended March 31, 2017 and 2016, respectively.

Non-qualifying Strategies

For our derivative instruments in consolidated VIEs that do not qualify for hedge accounting treatment, all changes in their fair value are reported in current period earnings within derivative and other gains (losses). The amount of gain or loss recognized in earnings for our VIEs is attributable to the derivatives in those investment structures. While the change in value of the swaps is recorded through current period earnings, the change in value of the available-for-sale fixed-maturity or perpetual securities associated with these swaps is recorded through other comprehensive income.

We have cross-currency interest rate swap agreements related to our $550 million senior notes due March 2020, $350 million senior notes due February 2022, $700 million senior notes due June 2023, $750 million senior notes due November 2024, $450 million senior notes due March 2025, and $500 million subordinated debentures due September 2052. Changes in the values of these swaps are recorded through current period earnings. For additional information

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regarding these swaps, see Note 8 in this report and Note 9 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

In 2016, we began using foreign exchange forwards to mitigate the currency risk of our U.S. dollar-denominated middle market loan and commercial mortgage loan portfolios held within the Aflac Japan segment. As of March 31, 2017, the outstanding derivative notional amounts associated with these U.S. dollar-denominated middle market loans and commercial mortgage loans were approximately $198 million and $780 million, respectively. We have not elected to apply hedge accounting for these middle market loans and commercial mortgage loans. The change in fair value of the foreign exchange forwards and the foreign currency remeasurement of the middle market loans and commercial mortgage loans are each recorded through current period earnings, and generally offset each other.

Impact of Derivatives and Hedging Instruments

The following table summarizes the impact to realized investment gains (losses) and other comprehensive income (loss) from all derivatives and hedging instruments.

	Three Months Ended March 31,
	2017								2016
(In millions)	Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)				Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)
Qualifying hedges:
Cash flow hedges:
Foreign currency swaps		$	0			$	2			$	0			$	3
Total cash flow hedges		0				2				0				3
Fair value hedges:
Foreign currency forwards(2)		(31		)		0				(25		)		0
Foreign currency options(2)		14				0				(1		)		0
Total fair value hedges		(17		)		0				(26		)		0
Net investment hedge:
Non-derivative hedging instruments		0				(17		)		0				(15		)
Foreign currency forwards		0				(9		)		0				(50		)
Foreign currency options		0				(23		)		0				(16		)
Total net investment hedge		0				(49		)		0				(81		)
Non-qualifying strategies:
Foreign currency swaps		(8		)		0				10				0
Foreign currency forwards		(27		)		0				11				0
Credit default swaps		0				0				1				0
Total non-qualifying strategies		(35		)		0				22				0
Total		$	(52	)		$	(47	)		$	(4	)		$	(78	)

⁽¹⁾ Cash flow hedge items are recorded as unrealized gains (losses) on derivatives and net investment hedge items are recorded in the unrealized foreign currency translation gains (losses) line in the consolidated statement of comprehensive income (loss).

⁽²⁾ Impact shown net of effect of hedged items (see Fair Value Hedges section of this Note 4 for further detail)

We reclassified a de minimis amount from accumulated other comprehensive income (loss) into earnings related to our designated cash flow hedges for the three-month periods ended March 31, 2017 and 2016. There was no gain orloss reclassified from accumulated other comprehensive income (loss) into earnings related to the net investment hedge for the three-month periods ended March 31, 2017 and 2016. As of March 31, 2017, deferred gains and losses on derivative instruments recorded in accumulated other comprehensive income that are expected to be reclassified to earnings during the next twelve months were immaterial.

Credit Risk Assumed through Derivatives

For the foreign currency and credit default swaps associated with our VIE investments for which we are the primary beneficiary, we bear the risk of foreign exchange loss due to counterparty default even though we are not a direct counterparty to those contracts. We are a direct counterparty to the foreign currency swaps that we have entered into in connection with certain of our senior notes and subordinated debentures; foreign currency forwards; foreign currency options; and interest rate swaptions, and therefore we are exposed to credit risk in the event of nonperformance by the

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counterparties in those contracts. The risk of counterparty default for our VIE swaps, foreign currency swaps, certain foreign currency forwards, foreign currency options and interest rate swaptions is mitigated by collateral posting requirements that counterparties to those transactions must meet. As of March 31, 2017, there were 16 counterparties to our derivative agreements, with five comprising 67% of the aggregate notional amount. The counterparties to these derivatives are financial institutions with the following credit ratings:

	March 31, 2017										December 31, 2016
(In millions)	Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value				Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value
Counterparties' credit rating:
AA		$	6,391		$	125		$	(172	)		$	6,844		$	247		$	(308	)
A		27,619			449			(862		)		36,019			900			(1,621		)
BBB		441			6			(65		)		1,064			60			(69		)
Total		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

We engage in derivative transactions directly with unaffiliated third parties under International Swaps and Derivatives Association, Inc. (ISDA) agreements and other documentation. Most of the ISDA agreements also include Credit Support Annexes (CSAs) provisions, which generally provide for two-way collateral postings at the first dollar of exposure. We mitigate the risk that counterparties to transactions might be unable to fulfill their contractual obligations by monitoring counterparty credit exposure and collateral value while generally requiring that collateral be posted at the outset of the transaction. In addition, a significant portion of the derivative transactions have provisions that give the counterparty the right to terminate the transaction upon a downgrade of Aflac’s financial strength rating. The actual amount of payments that we could be required to make, depends on market conditions, the fair value of outstanding affected transactions, and other factors prevailing at and after the time of the downgrade.

Collateral posted by us to third parties for derivative transactions can generally be repledged or resold by the counterparties. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position by counterparty was approximately $640 million and $1.2 billion as of March 31, 2017 and December 31, 2016, respectively. We are generally allowed to sell or repledge collateral obtained from our derivative counterparties, although we do not typically exercise such rights. (See the Offsetting tables below for collateral posted or received as of the reported balance sheet dates.)

Offsetting of Financial Instruments and Derivatives

Some of the Company's derivative instruments are subject to enforceable master netting arrangements that provide for the net settlement of all derivative contracts between the Parent Company or Aflac and its respective counterparty in the event of default or upon the occurrence of certain termination events. Collateral support agreements with the master netting arrangements generally provide that the Company will receive or pledge financial collateral at the first dollar of exposure.

We have securities lending agreements with unaffiliated financial institutions that post collateral to us in return for the use of our fixed maturity securities (see Note 3). When we have entered into securities lending agreements with the same counterparty, the agreements generally provide for net settlement in the event of default by the counterparty. This right of set-off allows us to keep and apply collateral received if the counterparty failed to return the securities borrowed from us as contractually agreed.

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The tables below summarize our derivatives and securities lending transactions, and as reflected in the tables, in accordance with U.S. GAAP, our policy is to not offset these financial instruments in the Consolidated Balance Sheets.

Offsetting of Financial Assets and Derivative Assets

March 31, 2017
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	434		$	0		$	434		$	(336	)	$	0		$	(97	)		$	1
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		146						146													146
Total derivative       assets		580			0			580			(336		)	0			(97		)		147
Securities lending    and similar    arrangements		1,445			0			1,445			0			0			(1,445		)		0
Total		$	2,025		$	0		$	2,025		$	(336	)	$	0		$	(1,542	)		$	147

December 31, 2016
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	1,080		$	0		$	1,080		$	(698	)	$	0		$	(382	)		$	0
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		127						127													127
Total derivative       assets		1,207			0			1,207			(698		)	0			(382		)		127
Securities lending    and similar    arrangements		513			0			513			0			0			(513		)		0
Total		$	1,720		$	0		$	1,720		$	(698	)	$	0		$	(895	)		$	127

33

Offsetting of Financial Liabilities and Derivative Liabilities

March 31, 2017
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(974	)		$	0		$	(974	)		$	336	$	527		$	23		$	(88	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(125		)					(125		)										(125		)
Total derivative       liabilities		(1,099		)		0			(1,099		)		336		527			23			(213		)
Securities lending    and similar    arrangements		(1,482		)		0			(1,482		)		1,445		0			0			(37		)
Total		$	(2,581	)		$	0		$	(2,581	)		$	1,781	$	527		$	23		$	(250	)

December 31, 2016
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(1,852	)		$	0		$	(1,852	)		$	698	$	1,130		$	21		$	(3	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(146		)					(146		)										(146		)
Total derivative       liabilities		(1,998		)		0			(1,998		)		698		1,130			21			(149		)
Securities lending    and similar    arrangements		(526		)		0			(526		)		513		0			0			(13		)
Total		$	(2,524	)		$	0		$	(2,524	)		$	1,211	$	1,130		$	21		$	(162	)

For additional information on our financial instruments, see the accompanying Notes 1, 3 and 5 and Notes 1, 3 and 5 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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5. FAIR VALUE MEASUREMENTS

Fair Value Hierarchy

U.S. GAAP specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. These two types of inputs create three valuation hierarchy levels. Level 1 valuations reflect quoted market prices for identical assets or liabilities in active markets. Level 2 valuations reflect quoted market prices for similar assets or liabilities in an active market, quoted market prices for identical or similar assets or liabilities in non-active markets or model-derived valuations in which all significant valuation inputs are observable in active markets. Level 3 valuations reflect valuations in which one or more of the significant inputs are not observable in an active market.

The following tables present the fair value hierarchy levels of the Company's assets and liabilities that are measured and carried at fair value on a recurring basis.

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	28,457		$	863		$	0		$	29,320
Municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities		0			309			195			504
Public utilities		0			7,827			16			7,843
Sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions		0			6,521			24			6,545
Other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions		0			1,551			0			1,551
Other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities		1,339			6			4			1,349
Other assets:
Foreign currency swaps		0			174			144			318
Foreign currency forwards		0			235			0			235
Foreign currency options		0			25			0			25
Credit default swaps		0			0			2			2
Total other assets		0			434			146			580
Other investments		141			0			0			141
Cash and cash equivalents		4,205			0			0			4,205
Total assets		$	34,142		$	50,560		$	420		$	85,122
Liabilities:
Foreign currency swaps		$	0		$	99		$	125		$	224
Foreign currency forwards		0			853			0			853
Foreign currency options		0			22			0			22
Total liabilities		$	0		$	974		$	125		$	1,099

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	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	25,387		$	827		$	0		$	26,214
Municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities		0			7,667			16			7,683
Sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions		0			6,038			25			6,063
Other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions		0			1,420			0			1,420
Other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities		1,300			6			3			1,309
Other assets:
Foreign currency swaps		0			365			125			490
Foreign currency forwards		0			672			0			672
Foreign currency options		0			43			0			43
Credit default swaps		0			0			2			2
Total other assets		0			1,080			127			1,207
Other investments		276			0			0			276
Cash and cash equivalents		4,859			0			0			4,859
Total assets		$	31,822		$	50,853		$	369		$	83,044
Liabilities:
Foreign currency swaps		$	0		$	84		$	146		$	230
Foreign currency forwards		0			1,717			0			1,717
Foreign currency options		0			51			0			51
Total liabilities		$	0		$	1,852		$	146		$	1,998

U.S. GAAP requires disclosure of the fair value of certain financial instruments including those that are not carried at fair value. The carrying amounts for cash and cash equivalents, other investments (excluding loan receivables), receivables, accrued investment income, accounts payable, cash collateral and payables for security transactions approximated their fair values due to the nature of these instruments. Liabilities for future policy benefits and unpaid policy claims are not financial instruments as defined by U.S. GAAP.

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The following tables present the carrying amount and fair value categorized by fair value hierarchy level for the Company's financial instruments that are not carried at fair value.

	March 31, 2017
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	21,493		$	26,607		$	0		$	0		$	26,607
Municipalities		363			0			467			0			467
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,324			0			3,693			0			3,693
Sovereign and supranational		2,702			0			3,009			0			3,009
Banks/financial institutions		3,650			0			3,830			0			3,830
Other corporate		2,839			0			3,285			0			3,285
Other investments (1)		1,309			0			0			1,288			1,288
Total assets		$	35,710		$	26,607		$	14,294		$	1,310		$	42,211
Liabilities:
Other policyholders’ funds		$	6,945		$	0		$	0		$	6,824		$	6,824
Notes payable (excluding capital leases)		5,230			0			5,226			266			5,492
Total liabilities		$	12,175		$	0		$	5,226		$	7,090		$	12,316

⁽¹⁾Excludes policy loans of $197 and equity method investments of $54, at carrying value

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	December 31, 2016
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	20,702		$	26,040		$	0		$	0		$	26,040
Municipalities		350			0			457			0			457
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,201			0			3,536			0			3,536
Sovereign and supranational		2,602			0			2,877			0			2,877
Banks/financial institutions		3,731			0			3,900			0			3,900
Other corporate		2,734			0			3,179			0			3,179
Other investments		1,174			0			0			1,142			1,142
Total assets		$	34,524		$	26,040		$	13,959		$	1,164		$	41,163
Liabilities:
Other policyholders’ funds		$	6,659		$	0		$	0		$	6,540		$	6,540
Notes payable (excluding capital leases)		5,339			0			0			5,530			5,530
Total liabilities		$	11,998		$	0		$	0		$	12,070		$	12,070

Fair Value of Financial Instruments

Fixed maturities, perpetual securities, and equity securities

We determine the fair values of our fixed maturity securities, perpetual securities, and public and privately issued equity securities using the following approaches or techniques: price quotes and valuations from third party pricing vendors (including quoted market prices readily available from public exchange markets) and non-binding price quotes we obtain from outside brokers.

A third party pricing vendor has developed valuation models to determine fair values of privately issued securities to reflect the impact of the persistent economic environment and the changing regulatory framework. These models are discounted cash flow (DCF) valuation models, but also use information from related markets, specifically the CDS market to estimate expected cash flows. These models take into consideration any unique characteristics of the securities and make various adjustments to arrive at an appropriate issuer-specific loss adjusted credit curve. This credit curve is then used with the relevant recovery rates to estimate expected cash flows and modeling of additional features, including illiquidity adjustments, if necessary, to price the security by discounting those loss adjusted cash flows. In cases where a credit curve cannot be developed from the specific security features, the valuation methodology takes into consideration other market observable inputs, including: 1) the most appropriate comparable security(ies) of the issuer; 2) issuer-specific CDS spreads; 3) bonds or CDS spreads of comparable issuers with similar characteristics such as rating, geography, or sector; or 4) bond indices that are comparative in rating, industry, maturity and region.

The pricing data and market quotes we obtain from outside sources, including third party pricing services, are reviewed internally for reasonableness. If a fair value appears unreasonable, we will re-examine the inputs and assess the reasonableness of the pricing data with the vendor. Additionally, we may compare the inputs to relevant market indices and other performance measurements. The output of this analysis is presented to the Company's Valuation and Classification Subcommittee (VCS). Based on the analysis provided to the VCS, the valuation is confirmed or may be revised if there is evidence of a more appropriate estimate of fair value based on available market data. We have

38

performed verification of the inputs and calculations in any valuation models to confirm that the valuations represent reasonable estimates of fair value.

The fixed maturities classified as Level 3 consist of securities for which there are limited or no observable valuation inputs. For Level 3 securities, we estimate the fair value of these securities by obtaining non-binding broker quotes from a limited number of brokers. These brokers base their quotes on a combination of their knowledge of the current pricing environment and market conditions. We consider these inputs to be unobservable. We also consider a variety of significant valuation inputs in the valuation process, including forward exchange rates, yen swap rates, dollar swap rates, interest rate volatilities, credit spread data on specific issuers, assumed default and default recovery rates, and certain probability assumptions. In obtaining these valuation inputs, we have determined that certain pricing assumptions and data used by our pricing sources are difficult to validate or corroborate by the market and/or appear to be internally developed rather than observed in or corroborated by the market. The use of these unobservable valuation inputs causes more subjectivity in the valuation process for these securities.

For the periods presented, we have not adjusted the quotes or prices we obtain from the pricing services and brokers we use.

The following tables present the pricing sources for the fair values of our fixed maturities, perpetual securities, and equity securities.

39

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	28,457		$	863		$	0		$	29,320
Total government and agencies		28,457			863			0			29,320
Municipalities:
Third party pricing vendor		0			1,322			0			1,322
Total municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities:
Third party pricing vendor		0			309			0			309
Broker/other		0			0			195			195
Total mortgage- and asset-backed securities		0			309			195			504
Public utilities:
Third party pricing vendor		0			7,827			0			7,827
Broker/other		0			0			16			16
Total public utilities		0			7,827			16			7,843
Sovereign and supranational:
Third party pricing vendor		0			1,386			0			1,386
Total sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions:
Third party pricing vendor		0			6,521			0			6,521
Broker/other		0			0			24			24
Total banks/financial institutions		0			6,521			24			6,545
Other corporate:
Third party pricing vendor		0			30,122			0			30,122
Broker/other		0			0			35			35
Total other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,551			0			1,551
Total banks/financial institutions		0			1,551			0			1,551
Other corporate:
Third party pricing vendor		0			219			0			219
Total other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities:
Third party pricing vendor		1,339			6			0			1,345
Broker/other		0			0			4			4
Total equity securities		1,339			6			4			1,349
Total securities available for sale		$	29,796		$	50,126		$	274		$	80,196

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	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,607		$	0		$	0		$	26,607
Total government and agencies		26,607			0			0			26,607
Municipalities:
Third party pricing vendor		0			467			0			467
Total municipalities		0			467			0			467
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,693			0			3,693
Total public utilities		0			3,693			0			3,693
Sovereign and supranational:
Third party pricing vendor		0			3,009			0			3,009
Total sovereign and supranational		0			3,009			0			3,009
Banks/financial institutions:
Third party pricing vendor		0			3,830			0			3,830
Total banks/financial institutions		0			3,830			0			3,830
Other corporate:
Third party pricing vendor		0			3,285			0			3,285
Total other corporate		0			3,285			0			3,285
Total securities held to maturity		$	26,607		$	14,294		$	22		$	40,923

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	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	25,387		$	827		$	0		$	26,214
Total government and agencies		25,387			827			0			26,214
Municipalities:
Third party pricing vendor		0			1,295			0			1,295
Total municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities:
Third party pricing vendor		0			1,139			0			1,139
Broker/other		0			0			198			198
Total mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities:
Third party pricing vendor		0			7,667			0			7,667
Broker/other		0			0			16			16
Total public utilities		0			7,667			16			7,683
Sovereign and supranational:
Third party pricing vendor		0			1,469			0			1,469
Total sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions:
Third party pricing vendor		0			6,038			0			6,038
Broker/other		0			0			25			25
Total banks/financial institutions		0			6,038			25			6,063
Other corporate:
Third party pricing vendor		0			29,699			0			29,699
Total other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,420			0			1,420
Total banks/financial institutions		0			1,420			0			1,420
Other corporate:
Third party pricing vendor		0			213			0			213
Total other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities:
Third party pricing vendor		1,300			6			0			1,306
Broker/other		0			0			3			3
Total equity securities		1,300			6			3			1,309
Total securities available for sale		$	26,687		$	49,773		$	242		$	76,702

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	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,040		$	0		$	0		$	26,040
Total government and agencies		26,040			0			0			26,040
Municipalities:
Third party pricing vendor		0			457			0			457
Total municipalities		0			457			0			457
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,536			0			3,536
Total public utilities		0			3,536			0			3,536
Sovereign and supranational:
Third party pricing vendor		0			2,877			0			2,877
Total sovereign and supranational		0			2,877			0			2,877
Banks/financial institutions:
Third party pricing vendor		0			3,900			0			3,900
Total banks/financial institutions		0			3,900			0			3,900
Other corporate:
Third party pricing vendor		0			3,179			0			3,179
Total other corporate		0			3,179			0			3,179
Total securities held to maturity		$	26,040		$	13,959		$	22		$	40,021

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The following is a discussion of the determination of fair value of our remaining financial instruments.

Derivatives

We use derivative instruments to manage the risk associated with certain assets. However, the derivative instrument may not be classified in the same fair value hierarchy level as the associated asset. Inputs used to value derivatives include, but are not limited to, interest rates, credit spreads, foreign currency forward and spot rates, and interest volatility.

The fair values of the foreign currency forwards, options, and interest rate swaptions associated with certain investments; the foreign currency forwards and options used to hedge foreign exchange risk from our net investment in Aflac Japan and economically hedge certain portions of forecasted cash flows denominated in yen; and the foreign currency swaps associated with certain senior notes and our subordinated debentures are based on the amounts we would expect to receive or pay. The determination of the fair value of these derivatives is based on observable market inputs, therefore they are classified as Level 2.

For derivatives associated with VIEs where we are the primary beneficiary, we are not the direct counterparty to the swap contracts. As a result, the fair value measurements incorporate the credit risk of the collateral associated with the VIE. We receive valuations from a third party pricing vendor for these derivatives. Based on an analysis of these derivatives and a review of the methodology employed by the pricing vendor, we determined that due to the long duration of these swaps and the need to extrapolate from short-term observable data to derive and measure long-term inputs, certain inputs, assumptions and judgments are required to value future cash flows that cannot be corroborated by current inputs or current observable market data. As a result, the derivatives associated with our consolidated VIEs are classified as Level 3 of the fair value hierarchy.

Loan Receivables

Our loan receivables do not have readily determinable market prices and generally lack market liquidity. Fair values for loan receivables are determined based on the present value of expected future cash flows discounted at the applicable U.S. Treasury or London Interbank Offered Rate (LIBOR) yield plus an appropriate spread that considers other risk factors, such as credit and liquidity risk. These spreads are provided by the applicable asset managers based on their knowledge of the current loan pricing environment and market conditions. The spreads are a significant component of the pricing inputs and are generally considered unobservable. Therefore, these investments have been assigned a Level 3 within the fair value hierarchy. Loan receivables are included in other investments on the consolidated balance sheets.

Other policyholders' funds

The largest component of the other policyholders' funds liability is our annuity line of business in Aflac Japan. Our annuities have fixed benefits and premiums. For this product, we estimated the fair value to be equal to the cash surrender value. This is analogous to the value paid to policyholders on the valuation date if they were to surrender their policy. We periodically check the cash value against discounted cash flow projections for reasonableness. We consider our inputs for this valuation to be unobservable and have accordingly classified this valuation as Level 3.

Notes payable

As of March 31, 2017, the fair values of our publicly issued notes payable classified as Level 2 were obtained from third party pricing vendors. As of December 31, 2016, the fair values of these notes payable were obtained from a limited number of independent brokers and classified as Level 3 within the fair value hierarchy. We consider this current valuation technique to be an improvement from the previous valuation technique. The fair values of our yen-denominated loans approximate their carrying values.

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Transfers between Hierarchy Levels and Level 3 Rollforward

There were no transfers between Level 1 and 2 for the three-month periods ended March 31, 2017 and 2016, respectively.

The following tables present the changes in fair value of our available-for-sale investments and derivatives classified as Level 3.

Three Months Ended March 31, 2017
	Fixed Maturities										Equity Securities			Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions			Other Corporate					Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	198		$	16	$	25		$	0	$	3		$	(21	)	$	2	$	223
Realized investment gains (losses) included    in earnings	0			0		0			0		0			38			0		38
Unrealized gains (losses) included in other    comprehensive income (loss)	6			0		(1		)	0		0			2			0		7
Purchases, issuances, sales and settlements:
Purchases	0			0		0			35		2			0			0		37
Issuances	0			0		0			0		0			0			0		0
Sales	0			0		0			0		(1		)	0			0		(1		)
Settlements	(9		)	0		0			0		0			0			0		(9		)
Transfers into Level 3	0			0		0			0		0			0			0		0
Transfers out of Level 3	0			0		0			0		0			0			0		0
Balance, end of period	$	195		$	16	$	24		$	35	$	4		$	19		$	2	$	295
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0		$	0	$	0		$	38		$	0	$	38

⁽¹⁾ Derivative assets and liabilities are presented net

Three Months Ended March 31, 2016
	Fixed Maturities							Equity Securities		Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions				Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	220		$	0	$	26	$	3	$	(192	)	$	1	$	58
Realized investment gains (losses) included    in earnings	0			0		0		0		125			1		126
Unrealized gains (losses) included in other    comprehensive income (loss)	21			0		0		0		4			0		25
Purchases, issuances, sales and settlements:
Purchases	0			0		0		0		0			0		0
Issuances	0			0		0		0		0			0		0
Sales	0			0		0		0		0			0		0
Settlements	(4		)	0		0		0		0			0		(4		)
Transfers into Level 3	0			0		0		0		0			0		0
Transfers out of Level 3	0			0		0		0		0			0		0
Balance, end of period	$	237		$	0	$	26	$	3	$	(63	)	$	2	$	205
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0	$	0	$	125		$	1	$	126

⁽¹⁾ Derivative assets and liabilities are presented net

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Fair Value Sensitivity

Level 3 Significant Unobservable Input Sensitivity

The following tables summarize the significant unobservable inputs used in the valuation of our Level 3 available-for-sale investments and derivatives. Included in the tables are the inputs or range of possible inputs that have an effect on the overall valuation of the financial instruments.

March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	195	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		24		Consensus pricing	Offered quotes	N/A	(d)
Other corporate		35		Discounted cash flow	Historical volatility	N/A	(e)
Equity securities		4		Net asset value	Offered quotes	$1 - $728 ($8)
Other assets:
Foreign currency swaps		25		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		50		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	10 - 79 bps
		69		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	61.55% - 66.55%	(e)
					CDS spreads	48 bps
					Recovery rate	36.69%
Total assets		$	420

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices.

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March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	106	Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		13		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	15 - 168 bps
		6		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Total liabilities		$	125

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

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December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	198	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		25		Consensus pricing	Offered quotes	N/A	(d)
Equity securities		3		Net asset value	Offered quotes	$1-$701 ($8)
Other assets:
Foreign currency swaps		16		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		29		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	16 - 88 bps
		80		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	52.18% - 56.07%	(e)
					CDS spreads	54 bps
					Recovery rate	36.69%
Total assets		$	369

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices

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December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	113	Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		23		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	24 - 216 bps
		10		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Total liabilities		$	146

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

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The following is a discussion of the significant unobservable inputs or valuation techniques used in determining the fair value of securities and derivatives classified as Level 3.

Net Asset Value

We hold certain unlisted equity securities whose fair value is derived based on the financial statements published by the investee. These securities do not trade on an active market and the valuations derived are dependent on the availability of timely financial reporting of the investee. Net asset value is an unobservable input in the determination of fair value ofequity securities.

Offered Quotes

In circumstances where our valuation model price is overridden because it implies a value that is not consistent with current market conditions, we will solicit bids from a limited number of brokers. We also receive unadjusted prices from brokers for our mortgage and asset-backed securities. These quotes are non-binding but are reflective of valuation best estimates at that particular point in time. Offered quotes are an unobservable input in the determination of fair value of mortgage- and asset-backed securities, certain banks/financial institutions, certain other corporate, and equity securities investments.

Interest Rates, CDS Spreads, Foreign Exchange Rates

The significant drivers of the valuation of the interest and foreign exchange swaps are interest rates, foreign exchange rates and CDS spreads. Our swaps have long maturities that increase the sensitivity of the swaps to interest rate fluctuations. Since most of our yen-denominated cross currency swaps are in a net liability position, an increase in interest rates will decrease the liabilities and increase the value of the swap.

Foreign exchange swaps also have a lump-sum final settlement of foreign exchange principal receivables at the termination of the swap. An increase in yen interest rates will decrease the value of the final settlement foreign exchange receivables and decrease the value of the swap, and an increase in U.S. dollar interest rates will increase the swap value.

A similar sensitivity pattern is observed for the foreign exchange rates. When the spot U.S. dollar/Japanese yen (USD/JPY) foreign exchange rate decreases and the swap is receiving a final exchange payment in JPY, the swap value will increase due to the appreciation of the JPY. Most of our swaps are designed to receive payments in JPY at the termination and will thus be impacted by the USD/JPY foreign exchange rate in this way. In cases where there is no final foreign exchange receivable in JPY and we are paying JPY as interest payments and receiving USD, a decrease in the foreign exchange rate will lead to a decrease in the swap value.

The extinguisher feature in most of our swaps results in a cessation of cash flows and no further payments between the parties to the swap in the event of a default on the referenced or underlying collateral. To price this feature, we apply the survival probability of the referenced entity to the projected cash flows. The survival probability uses the CDS spreads and recovery rates to adjust the present value of the cash flows. For extinguisher swaps with positive values, an increase in CDS spreads decreases the likelihood of receiving the final exchange payments and reduces the value of the swap.

Due to the long duration of these swaps and the need to extrapolate from short-term observable data to derive and measure long-term inputs, certain inputs, assumptions and judgments are required to value future cash flows that cannot be corroborated by current inputs or current observable market data.

Interest rates, CDS spreads, and foreign exchange rates are unobservable inputs in the determination of fair value of foreign currency swaps.

Base Correlations, CDS Spreads, Recovery Rates

Our remaining collateralized debt obligation (CDO) is a tranche on a basket of single-name credit default swaps. The risk in this synthetic CDO comes from the single-name CDS risk and the correlations between the single names. The valuation of synthetic CDOs is dependent on the calibration of market prices for interest rates, single name CDS default probabilities and base correlation using financial modeling tools. Since there is limited or no observable data available for this tranche, the base correlations must be obtained from commonly traded market tranches such as the CDX and iTraxx indices. From the historical prices of these indices, base correlations can be obtained to develop a pricing curve of CDOs with different seniorities. Since the reference entities of the market indices do not match those in the portfolio underlying

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the synthetic CDO to be valued, several processing steps are taken to map the CDO in our portfolio to the indices. With the base correlation determined and the appropriate spreads selected, a valuation is calculated. An increase in the CDS spreads in the underlying portfolio leads to a decrease in the value due to higher probability of defaults and losses. The impact on the valuation due to base correlation depends on a number of factors, including the riskiness between market tranches and the modeled tranche based on our portfolio and the equivalence between detachment points in these tranches. Generally speaking, an increase in base correlation will decrease the value of the senior tranches while increasing the value of junior tranches. This may result in a positive or negative value change.

The CDO tranche in our portfolio is a senior mezzanine tranche and, due to the low level of credit support for this type of tranche, exhibits equity-like behavior. As a result, an increase in recovery rates tends to cause its value to decrease.

Base correlations, CDS spreads, and recovery rates are unobservable inputs in the determination of fair value of credit default swaps.

For additional information on our investments and financial instruments, see the accompanying Notes 1, 3 and 4 and Notes 1, 3 and 4 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

6. POLICY LIABILITIES

Changes in the liability for unpaid policy claims were as follows for the three-month periods ended March 31:

(In millions)	2017				2016
Unpaid supplemental health claims, beginning of year		$	3,707			$	3,548
Less reinsurance recoverables		27				26
Net balance, beginning of year		3,680				3,522
Add claims incurred during the year related to:
Current year		1,737				1,705
Prior years		(111		)		(142		)
Total incurred		1,626				1,563
Less claims paid during the year on claims incurred during:
Current year		505				493
Prior years		1,055				1,046
Total paid		1,560				1,539
Effect of foreign exchange rate changes on unpaid claims		80				136
Net balance, end of period		3,826				3,682
Add reinsurance recoverables		29				28
Unpaid supplemental health claims, end of period		3,855				3,710
Unpaid life claims, end of period		375				280
Total liability for unpaid policy claims		$	4,230			$	3,990

The incurred claims development related to prior years reflects favorable claims experience compared to previous estimates, primarily in our lines of business in Japan.

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7. REINSURANCE

We enter into fixed quota-share coinsurance agreements with other companies in the normal course of business. For each of our reinsurance agreements, we determine whether the agreement provides indemnification against loss or liability relating to insurance risk in accordance with applicable accounting standards. Reinsurance premiums and benefits paid or provided are accounted for on bases consistent with those used in accounting for the original policies issued and the terms of the reinsurance contracts. Premiums and benefits are reported net of insurance ceded.

We have recorded a deferred profit liability related to reinsurance transactions. The remaining deferred profit liability of $919 million, as of March 31, 2017, included in future policy benefits in the consolidated balance sheet, is being amortized into income over the expected lives of the policies. We also have recorded a reinsurance recoverable for reinsurance transactions, which is included in other assets in the consolidated balance sheet and had a remaining balance of $900 million and $860 million as of March 31, 2017 and December 31, 2016, respectively. The increase in the reinsurance recoverable balance was driven by two aggregating factors: yen strengthening and the growth in reserves related to the business that has been reinsured as the policies age. The spot yen/dollar exchange rate strengthened by approximately 4%and ceded reserves increased approximately 1% from December 31, 2016 to March 31, 2017.

The following table reconciles direct premium income and direct benefits and claims to net amounts after the effect of reinsurance.

	Three Months Ended March 31,
(In millions)	2017				2016
Direct premium income		$	4,724			$	4,690
Ceded to other companies:
Ceded Aflac Japan closed blocks		(130		)		(134		)
Other		(12		)		(12		)
Assumed from other companies:
Retrocession activities		54				56
Other		2				2
Net premium income		$	4,638			$	4,602
Direct benefits and claims		$	3,129			$	3,103
Ceded benefits and change in reserves for future benefits:
Ceded Aflac Japan closed blocks		(122		)		(121		)
Eliminations		13				14
Other		(11		)		(10		)
Assumed from other companies:
Retrocession activities		54				53
Eliminations		(13		)		(14		)
Other		2				0
Benefits and claims, net		$	3,052			$	3,025

These reinsurance transactions are indemnity reinsurance that do not relieve us from our obligations to policyholders. In the event that the reinsurer is unable to meet their obligations, we remain liable for the reinsured claims.

As a part of our capital contingency plan, we entered into a committed reinsurance facility agreement on December 1, 2015 in the amount of approximately 110 billion yen. This reinsurance facility agreement was renewed in 2016 and is effective until December 31, 2017. There are also additional commitment periods of a one-year duration each which are automatically extended unless notification is received from the reinsurer within 60 days prior to the expiration. The reinsurer can withdraw from the committed facility if Aflac‘s Standard and Poor's (S&P) rating drops below BBB-. As of March 31, 2017, we have not executed a reinsurance treaty under this committed reinsurance facility.

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8. NOTES PAYABLE

A summary of notes payable follows:

(In millions)	March 31, 2017			December 31, 2016
2.65% senior notes paid February 2017		$	0		$	649
2.40% senior notes due March 2020		545			547
4.00% senior notes due February 2022		346			348
3.625% senior notes due June 2023		693			696
3.625% senior notes due November 2024		742			745
3.25% senior notes due March 2025		444			445
2.875% senior notes due October 2026		298			298
6.90% senior notes due December 2039		221			220
6.45% senior notes due August 2040		255			254
4.00% senior notes due October 2046		394			394
5.50% subordinated debentures due September 2052		495			486
Yen-denominated senior notes:
.932% senior notes due January 2027 (principal amount 60.0 billion yen)		531			0
Yen-denominated loans:
Variable interest rate loan due September 2021 (.31% in 2017 and 2016, principal amount 5.0 billion yen)		44			43
Variable interest rate loan due September 2023 (.46% in 2017 and 2016, principal amount 25.0 billion yen)		222			214
Capitalized lease obligations payable through 2024		20			21
Total notes payable		$	5,250		$	5,360

Amounts in the table above are reported net of debt issuance costs and issuance premiums or discounts, if applicable, that are being amortized over the life of the notes.

In January 2017, the Parent Company issued 60.0 billion yen of senior notes through a U.S. public debt offering. The notes bear interest at a fixed rate of .932% per annum, payable semi-annually, and have a 10-year maturity. These notes may only be redeemed before maturity, in whole but not in part, upon the occurrence of certain changes affecting U.S. taxation, as specified in the indenture governing the terms of the issuance.

In February 2017, the Parent Company extinguished $650 million of 2.65% senior notes upon their maturity.

The Parent Company and Aflac have a 364-day uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $100 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. Borrowings under the financing agreement will mature no later than three months after the last drawdown date of October 14, 2017. As of March 31, 2017, we did not have any borrowings outstanding under our $100 million credit agreement.

The Parent Company has a three-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 100.0 billion yen on a revolving basis. Borrowings bear interest at a rate per annum equal to the Tokyo interbank market rate (TIBOR) plus, at our option, either (a) the applicable TIBOR margin during the period from the closing date to the commitment termination date or (b) the applicable TIBOR margin during the term out period. The applicable margin ranges between .35% and .75% during the period from the closing date to the commitment termination date and .70% and 1.50% during the term out period, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company is required to pay a facility fee on the commitments ranging between .30% and .50%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under this credit agreement may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company, and will expire on the earlier of (a) March 31, 2019, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. The

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credit facility requires compliance with certain financial covenants on a quarterly basis. As of March 31, 2017, we did not have any borrowings outstanding under our 100.0 billion yen revolving credit agreement.

The Parent Company and Aflac have a five-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 55.0 billion yen or the equivalent of yen in U.S. dollars on a revolving basis. This credit agreement provides for borrowings in Japanese yen or the equivalent of Japanese yen in U.S. dollars on a revolving basis. Borrowings bear interest at a rate per annum equal to, at our option, either (a) a eurocurrency rate determined by reference to the LIBOR for the interest period relevant to such borrowing adjusted for certain additional costs or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus ½ of 1%, (2) the rate of interest for such day announced by Mizuho Bank, Ltd. as its prime rate and (3) the eurocurrency rate for an interest period of one month plus 1.00%, in each case plus an applicable margin. The applicable margin ranges between .79% and 1.275% for eurocurrency rate borrowings and 0.0% and .275% for base rate borrowings, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company and Aflac are required to pay a facility fee on the commitments ranging between .085% and .225%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under the amended and restated credit facility may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company and Aflac. The amended and restated credit facility requires compliance with certain financial covenants on a quarterly basis and will expire on the earlier of (a) September 18, 2020, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. As of March 31, 2017, we did not have any borrowings outstanding under our 55.0 billion yen revolving credit agreement.

The Parent Company and Aflac have an uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $50 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. As of March 31, 2017, we did not have any borrowings outstanding under our $50 million credit agreement.

We were in compliance with all of the covenants of our notes payable and lines of credit at March 31, 2017. No events of default or defaults occurred during the three-month period ended March 31, 2017.

For additional information, see Notes 4 and 9 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

9. SHAREHOLDERS’ EQUITY

The following table is a reconciliation of the number of shares of the Company's common stock for the three-month periods ended March 31.

(In thousands of shares)	2017		2016
Common stock - issued:
Balance, beginning of period	671,249		669,723
Exercise of stock options and issuance of restricted shares	434		678
Balance, end of period	671,683		670,401
Treasury stock:
Balance, beginning of period	265,439		245,343
Purchases of treasury stock:
Open market	8,493		10,152
Other	144		189
Dispositions of treasury stock:
Shares issued to AFL Stock Plan	(247	)	(311	)
Exercise of stock options	(128	)	(64	)
Other	(20	)	(111	)
Balance, end of period	273,681		255,198
Shares outstanding, end of period	398,002		415,203

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Outstanding share-based awards are excluded from the calculation of weighted-average shares used in the computation of basic earnings per share (EPS). The following table presents the approximate number of share-based awards to purchase shares, on a weighted-average basis, that were considered to be anti-dilutive and were excluded from the calculation of diluted earnings per share for the following periods.

	Three Months Ended March 31,
(In thousands)	2017		2016
Anti-dilutive share-based awards		321		2,682

Share Repurchase Program

During the first three months of 2017, we repurchased 8.5 million shares of our common stock in the open market for $600 million as part of our share repurchase program. During the first three months of 2016, we repurchased 10.2 million shares of our common stock in the open market for $600 million as part of our share repurchase program. As of March 31, 2017, a remaining balance of 18.3 million shares of our common stock was available for purchase under share repurchase authorizations by our board of directors.

Reclassifications from Accumulated Other Comprehensive Income

The tables below are reconciliations of accumulated other comprehensive income by component for the following periods.

Changes in Accumulated Other Comprehensive Income

Three Months Ended March 31, 2017
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(1,983	)		$	4,805			$	(24	)		$	(168	)		$	2,630
Other comprehensive income (loss) before reclassification		333				(341		)		2				(4		)		(10		)
Amounts reclassified from accumulated other comprehensive income (loss)		0				10				0				2				12
Net current-period other comprehensive income (loss)		333				(331		)		2				(2		)		2
Balance, end of period		$	(1,650	)		$	4,474			$	(22	)		$	(170	)		$	2,632

All amounts in the table above are net of tax.

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Three Months Ended March 31, 2016
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(2,196	)		$	2,986			$	(26	)		$	(139	)		$	625
Other comprehensive income (loss) before reclassification		612				1,748				2				(1		)		2,361
Amounts reclassified from accumulated other comprehensive income (loss)		0				(50		)		0				0				(50		)
Net current-period other comprehensive income (loss)		612				1,698				2				(1		)		2,311
Balance, end of period		$	(1,584	)		$	4,684			$	(24	)		$	(140	)		$	2,936

All amounts in the table above are net of tax.

The tables below summarize the amounts reclassified from each component of accumulated other comprehensive income based on source for the following periods.

Reclassifications Out of Accumulated Other Comprehensive Income

(In millions)	Three Months Ended March 31, 2017
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	(6	)	Sales and redemptions
		(10		)	Other-than-temporary impairment losses realized
		(16		)	Total before tax
		6			Tax (expense) or benefit(1)
		$	(10	)	Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		0			Acquisition and operating expenses(2)
		1			Tax (expense) or benefit(1)
		$	(2	)	Net of tax
Total reclassifications for the period		$	(12	)	Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

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(In millions)	Three Months Ended March 31, 2016
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	91		Sales and redemptions
		(14		)	Other-than-temporary impairment losses realized
		77			Total before tax
		(27		)	Tax (expense) or benefit(1)
		$	50		Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		3			Acquisition and operating expenses(2)
		0			Tax (expense) or benefit(1)
		$	0		Net of tax
Total reclassifications for the period		$	50		Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

10.    SHARE-BASED COMPENSATION

As of March 31, 2017, the Company has outstanding share-based awards under the Aflac Incorporated 2004 Long-Term Incentive Plan (as Amended and Restated March 14, 2012) (the “2004 Plan”). Share-based awards are designed to reward employees for their long-term contributions to the Company and provide incentives for them to remain with the Company. The number and frequency of share-based awards are based on competitive practices, operating results of the Company, government regulations, and other factors.

The 2004 Plan, as amended on March 14, 2012, allows for a maximum number of shares issuable over its term of 25 million shares including 12 million shares that may be awarded in respect of awards other than options or stock appreciation rights. If any awards granted under the 2004 Plan are forfeited or are terminated before being exercised or settled for any reason other than tax forfeiture, then the shares underlying the awards will again be available under the 2004 Plan.

The 2004 Plan allows awards to Company employees for incentive stock options (ISOs), non-qualifying stock options (NQSOs), restricted stock, restricted stock units, and stock appreciation rights. Non-employee directors are eligible for grants of NQSOs, restricted stock, and stock appreciation rights. As of March 31, 2017, approximately 8.0 million shares were available for future grants under this plan. The ISOs and NQSOs have a term of 10 years, and the share-based awards generally vest upon time-based conditions or time and performance-based conditions. Time-based vesting generally occurs after three years. Performance-based vesting conditions generally include the attainment of goals related to Company financial performance. As of March 31, 2017, the only performance-based awards issued and outstanding were restricted stock awards.

Stock options and stock appreciation rights granted under the amended 2004 Plan have an exercise price of at least 100% of the fair market value of the underlying stock on the grant date and have an expiration date no later than 10 years from the grant date. Time-based restricted stock awards, restricted stock units and stock options granted after January 1, 2017 vest on a ratable basis over three years, and awards granted prior to the amendment vest on a three-year cliff basis. The Compensation Committee of the Board of Directors has the discretion to determine vesting schedules.

Share-based awards granted to U.S.-based grantees are settled with authorized but unissued Company stock, while those issued to Japan-based grantees are settled with treasury shares.

The following table provides information on stock options outstanding and exercisable at March 31, 2017.

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	Stock Option Shares (in thousands)		Weighted-Average Remaining Term (in years)		Aggregate Intrinsic Value (in millions)			Weighted-Average Exercise Price Per Share
Outstanding		6,245		4.9		$	119		$	53.38
Exercisable		4,504		3.4		102			49.72

We received cash from the exercise of stock options in the amount of $17 million during the first three months of 2017, compared with $10 million in the first three months of 2016. The tax benefit realized as a result of stock option exercises and restricted stock releases was $14 million in the first three months of 2017, compared with $13 million in the first three months of 2016.

As of March 31, 2017, total compensation cost not yet recognized in our financial statements related to restricted stock awards was $62 million, of which $29 million (973 thousand shares) was related to restricted stock awards with a performance-based vesting condition. We expect to recognize these amounts over a weighted-average period of approximately 1.7 years. There are no other contractual terms covering restricted stock awards once vested.

The following table summarizes restricted stock activity during the three-month period ended March 31.

(In thousands of shares)	Shares		Weighted-Average Grant-Date Fair Value Per Share
Restricted stock at December 31, 2016	1,868			$	61.76
Granted in 2017	489			71.97
Canceled in 2017	(4	)		65.05
Vested in 2017	(437	)		62.23
Restricted stock at March 31, 2017	1,916			$	64.12

In February 2017, the Company granted 253 thousand performance-based stock awards, which are contingent on the achievement of the Company's financial performance metrics and its market-based conditions. On the date of grant, the Company estimated the fair value of restricted stock awards with market-based conditions using a Monte Carlo simulation model. The model discounts the value of the stock at the assumed vesting date based on the risk-free interest rate. Based on estimates of actual performance versus the vesting thresholds, the calculated fair value percentage pay-out estimate will be updated each quarter.

The Company uses third-party analyses to assist in developing the assumptions used in, as well as calibrating, a Monte Carlo simulation model. The Company is responsible for determining the assumptions used in estimating the fair value of its share-based payment awards.

On January 1, 2017, we adopted accounting guidance related to employee share-based payment accounting, which requires an entity to elect whether to use estimates of forfeitures, or to account for forfeitures as they occur, using modified retrospective application. We have made an entity-wide accounting policy election to estimate the number of awards that are expected to vest (consistent with our prior policy). The election and adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

For additional information on our long-term share-based compensation plans and the types of share-based awards, see Note 12 of the Notes to the Consolidated Financial Statements included in the 2016 Annual Report.

11. BENEFIT PLANS

We have funded defined benefit plans in Japan and the United States, however the U.S. plan was frozen to new participants effective October 1, 2013. We also maintain non-qualified, unfunded supplemental retirement plans that provide defined pension benefits in excess of limits imposed by federal tax law for certain Japanese, U.S. and former employees, however the U.S. plan was frozen to new participants effective January 1, 2015. U.S. employees who are not participants in the defined benefit plan receive a nonelective 401(k) employer contribution.

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We provide certain health care benefits for eligible U.S. retired employees, their beneficiaries and covered dependents ("other postretirement benefits"). The health care plan is contributory and unfunded. Effective January 1, 2014, employees eligible for benefits included the following: (1) active employees whose age plus service, in years, equaled or exceeded 80 (rule of 80); (2) active employees who were age 55 or older and have met the 15 years of service requirement; (3) active employees who would meet the rule of 80 in the next five years; (4) active employees who were age 55 or older and who would meet the 15 years of service requirement within the next five years; and (5) current retirees. For certain employees and former employees, additional coverage is provided for all medical expenses for life.

Pension and other postretirement benefit expenses, included in acquisition and operating expenses in the consolidated statement of earnings, included the following components:

	Three Months Ended March 31,
	Pension Benefits																Other
	Japan								U.S.								Postretirement Benefits
(In millions)	2017				2016				2017				2016				2017			2016
Components of net periodic benefit cost:
Service cost		$	5			$	4			$	6			$	6			$	0		$	0
Interest cost		1				2				8				8				0			0
Expected return on plan assets		(1		)		(1		)		(6		)		(6		)		0			0
Amortization of net actuarial loss		0				0				3				3				0			0
Amortization of prior service cost (credit)		0				0				0				0				0			(3		)
Net periodic (benefit) cost		$	5			$	5			$	11			$	11			$	0		$	(3	)

During the three months ended March 31, 2017, Aflac Japan contributed approximately $6 million (using the weighted-average yen/dollar exchange rate for the three-month period ending March 31, 2017) to the Japanese funded defined benefit plan, and Aflac U.S. did not make a contribution to the U.S. funded defined benefit plan.

For additional information regarding our Japanese and U.S. benefit plans, see Note 14 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

12. COMMITMENTS AND CONTINGENT LIABILITIES

We are a defendant in various lawsuits considered to be in the normal course of business. Members of our senior legal and financial management teams review litigation on a quarterly and annual basis. The final results of any litigation cannot be predicted with certainty. Although some of this litigation is pending in states where large punitive damages, bearing little relation to the actual damages sustained by plaintiffs, have been awarded in recent years, we believe the outcome of pending litigation will not have a material adverse effect on our financial position, results of operations, or cash flows.

See Note 3 of the Notes to the Consolidated Financial Statements for details on investment commitments.

Guaranty Fund Assessments

The United States insurance industry has a policyholder protection system that is monitored and regulated by state insurance departments. These life and health insurance guaranty associations are state entities (in all 50 states as well as Puerto Rico and the District of Columbia) created to protect policyholders of an insolvent insurance company. All insurance companies (with limited exceptions) licensed to sell life or health insurance in a state must be members of that state’s guaranty association. Under state guaranty association laws, certain insurance companies can be assessed (up to prescribed limits) for certain obligations to the policyholders and claimants of impaired or insolvent insurance companies that write the same line or similar lines of business.

In 2009, the Pennsylvania Insurance Commissioner placed long-term care insurer Penn Treaty Network America Insurance Company and its subsidiary American Network Insurance Company (collectively referred to as Penn Treaty), neither of which is affiliated with Aflac, in rehabilitation and petitioned a state court for approval to liquidate Penn Treaty. A

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final order of liquidation was granted by a recognized judicial authority on March 1, 2017, and as a result, Penn Treaty is in the process of liquidation. We have estimated and recognized the impact of our share of guaranty fund assessments resulting from the liquidation using a discounted rate of 4.25%. We have recognized a discounted liability for the assessments of $62 million (undiscounted $94 million), offset by discounted premium tax credits of $48 million (undiscounted $74 million), for a net $14 million impact to net income as of March 31, 2017. We expect a majority of these assessments to be paid over the next year and a majority of the tax credits to be realized over the next five years. We use the most current cost estimate provided by the National Organization of Life and Health Guaranty Associations (NOLHGA) to calculate our estimated assessments and tax credits. To the extent Medicare part D related premiums are included in the industry premiums within the latest NOLHGA annual report, our assessments estimate will increase. Since this information is not available at this time, we cannot at this time estimate the extent of the increase, if any.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

FORWARD-LOOKING INFORMATION

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” to encourage companies to provide prospective information, so long as those informational statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those included in the forward-looking statements. We desire to take advantage of these provisions. This report contains cautionary statements identifying important factors that could cause actual results to differ materially from those projected herein, and in any other statements made by Company officials in communications with the financial community and contained in documents filed with the Securities and Exchange Commission (SEC). Forward-looking statements are not based on historical information and relate to future operations, strategies, financial results or other developments. Furthermore, forward-looking information is subject to numerous assumptions, risks and uncertainties. In particular, statements containing words such as “expect,” “anticipate,” “believe,” “goal,” “objective,” “may,” “should,” “estimate,” “intends,” “projects,” “will,” “assumes,” “potential,” “target,” "outlook" or similar words as well as specific projections of future results, generally qualify as forward-looking. Aflac undertakes no obligation to update such forward-looking statements.

We caution readers that the following factors, in addition to other factors mentioned from time to time, could cause actual results to differ materially from those contemplated by the forward-looking statements:

• difficult conditions in global capital markets and the economy

• exposure to significant interest rate risk

• concentration of business in Japan

• foreign currency fluctuations in the yen/dollar exchange rate

• failure to execute or implement the conversion of the Japan branch to a legal subsidiary

• limited availability of acceptable yen-denominated investments

• deviations in actual experience from pricing and reserving assumptions

• ability to continue to develop and implement improvements in information technology systems

• governmental actions for the purpose of stabilizing the financial markets

• interruption in telecommunication, information technology and other operational systems, or a failure to maintain the security, confidentiality or privacy of sensitive data residing on such systems

• ongoing changes in our industry

• failure to comply with restrictions on patient privacy and information security

• extensive regulation and changes in law or regulation by governmental authorities

• defaults and credit downgrades of investments

• ability to attract and retain qualified sales associates and employees

• decline in creditworthiness of other financial institutions

• subsidiaries' ability to pay dividends to Aflac Incorporated

• decreases in our financial strength or debt ratings

• inherent limitations to risk management policies and procedures

• concentration of our investments in any particular single-issuer or sector

• differing judgments applied to investment valuations

• ability to effectively manage key executive succession

• significant valuation judgments in determination of amount of impairments taken on our investments

• catastrophic events including, but not necessarily limited to, epidemics, pandemics, tornadoes, hurricanes, earthquakes, tsunamis, acts of terrorism and damage incidental to such events

• changes in U.S. and/or Japanese accounting standards

• loss of consumer trust resulting from events external to our operations

• increased expenses and reduced profitability resulting from changes in assumptions for pension and other postretirement benefit plans

• level and outcome of litigation

• failure of internal controls or corporate governance policies and procedures

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MD&A OVERVIEW

Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) is intended to inform the reader about matters affecting the financial condition and results of operations of Aflac Incorporated and its subsidiaries for the three-month periods ended March 31, 2017 and 2016, respectively. Results of operations for interim periods are not necessarily indicative of results for the entire year. As a result, the following discussion should be read in conjunction with the consolidated financial statements and notes that are included in our annual report on Form 10-K for the year ended December 31, 2016 (2016 Annual Report). This MD&A is divided into the following sections:

• Our Business

• Performance Highlights

• Critical Accounting Estimates

• Results of Operations, consolidated and by segment

• Analysis of Financial Condition

• Capital Resources and Liquidity, including discussion of availability of capital and the sources and uses of cash

OUR BUSINESS

Aflac Incorporated (the Parent Company) and its subsidiaries (collectively, the Company) primarily sell supplemental health and life insurance in the United States and Japan. The Company’s insurance business is marketed and administered through American Family Life Assurance Company of Columbus (Aflac), which operates in the United States (Aflac U.S.) and as a branch in Japan (Aflac Japan). American Family Life Assurance Company of New York (Aflac New York) is a wholly owned subsidiary of Aflac. Most of Aflac’s policies are individually underwritten and marketed through independent agents. Additionally, Aflac U.S. markets and administers group products through Continental American Insurance Company (CAIC), branded as Aflac Group Insurance. Our insurance operations in the United States and our branch in Japan service the two markets for our insurance business.

PERFORMANCE HIGHLIGHTS

Yen-denominated income statement accounts are translated to U.S. dollars using a weighted-average Japanese yen/U.S. dollar foreign exchange rate, while yen-denominated balance sheet accounts are translated to U.S. dollars using a spot Japanese yen/U.S. dollar foreign exchange rate. The spot yen/dollar exchange rate at March 31, 2017 was 112.19, or 3.8%stronger than the spot yen/dollar exchange rate of 116.49 at December 31, 2016. The weighted-average yen/dollar exchange rate for the three-month period ended March 31, 2017 was 113.56, or 1.6%stronger than the weighted-average yen/dollar exchange rate of 115.35 for the same period in 2016.

Revenues were $5.3 billion in the first quarter of 2017, compared with $5.5 billion in the first quarter of 2016. Net earnings were $592 million, or $1.47per diluted share, compared with $731 million, or $1.74 per diluted share, in the first quarter of 2016. The decrease in revenue and net earnings reflects realized gains and losses in the comparable quarters and lower premium and investment income in the Japan segment attributable to the low-interest-rate environment.

Results in the firstquarter of 2017 included pretax net realized investment losses of $140 million, compared with net realized investment gains of $30 million in the firstquarter of 2016. Net investment losses in the firstquarter of 2017 included $10 million of other-than-temporary impairment losses; $7 million of net losses from the sale or redemption of securities; and $123 million of net losses from derivatives and foreign currency gains (losses).

Shareholders’ equity included a net unrealized gain on investment securities and derivatives of $4.5 billion at March 31, 2017, compared with a net unrealized gain of $4.8 billion at December 31, 2016.

In January 2017, the Parent Company issued 60.0 billion yen of senior notes through a U.S. public debt offering. In February 2017, the Parent Company extinguished $650 million of 2.65% senior notes upon their maturity. For further information regarding these transactions, see Note 8 of the Notes to the Consolidated Financial Statements and the Capital Resources and Liquidity section of this MD&A.

In the first three months of 2017, we repurchased 8.5 million shares of our common stock in the open market for $600 million under our share repurchase program.

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CRITICAL ACCOUNTING ESTIMATES

We prepare our financial statements in accordance with U.S. generally accepted accounting principles (GAAP). These principles are established primarily by the Financial Accounting Standards Board (FASB). In this MD&A, references to U.S. GAAP issued by the FASB are derived from the FASB Accounting Standards Codification^™ (ASC). The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates based on currently available information when recording transactions resulting from business operations. The estimates that we deem to be most critical to an understanding of Aflac’s results of operations and financial condition are those related to the valuation of investments and derivatives, deferred policy acquisition costs (DAC), liabilities for future policy benefits and unpaid policy claims, and income taxes. The preparation and evaluation of these critical accounting estimates involve the use of various assumptions developed from management’s analyses and judgments. The application of these critical accounting estimates determines the values at which 94% of our assets and 79% of our liabilities are reported as of March 31, 2017, and thus has a direct effect on net earnings and shareholders’ equity. Subsequent experience or use of other assumptions could produce significantly different results.

There have been no changes in the items that we have identified as critical accounting estimates during the three months ended March 31, 2017. For additional information, see the Critical Accounting Estimates section of MD&A included in the 2016 Annual Report.

New Accounting Pronouncements

For information on new accounting pronouncements and the impact, if any, on our financial position or results of operations, see Note 1 of the Notes to the Consolidated Financial Statements.

RESULTS OF OPERATIONS

The following discussion includes references to our performance measures, operating earnings and operating earnings per diluted share, which are not calculated in accordance with U.S. GAAP. These measures exclude items that we believe may obscure the underlying fundamentals and trends in our insurance operations because they tend to be driven by general economic conditions and events or related to infrequent activities not directly associated with our insurance operations. Our management uses operating earnings and operating earnings per diluted share to evaluate the financial performance of our insurance operations on a consolidated basis, and we believe that a presentation of these measures is vitally important to an understanding of our underlying profitability drivers and trends of our insurance business.

Aflac defines operating earnings (a non-U.S. GAAP financial measure) as the profits derived from operations. Operating earnings includes interest cash flows associated with notes payable and hedge costs related to foreign currency denominated investments, but excludes certain items that cannot be predicted or that are outside of management's control, such as realized investment gains and losses from securities transactions, impairments, and certain derivative and foreign currency activities; nonrecurring items; and other non-operating income (loss) from net earnings. Nonrecurring and other non-operating items consist of infrequent events and activity not associated with the normal course of the Company’s insurance operations and do not reflect Aflac’s underlying business performance. We define operating earnings per share (basic or dilutive) to be operating earnings for the period divided by the average outstanding shares (basic or dilutive) for the period presented.

Because a significant portion of our business is conducted in Japan and foreign exchange rates are outside of management’s control, we believe it is important to understand the impact of translating Japanese yen into U.S. dollars. Operating earnings and operating earnings per diluted shares excluding current period foreign currency impact are computed using the average yen/dollar exchange rate for the comparable prior year period, which eliminates dollar based fluctuations driven solely from currency rate changes.

The following table is a reconciliation of items impacting operating earnings, net earnings, operating earnings per diluted share, and net earnings per diluted share to the most directly comparable U.S. GAAP measures.

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Reconciliation of Net Earnings to Operating Earnings

	In Millions						Per Diluted Share
	Three Months Ended March 31,
	2017			2016			2017			2016
Net earnings	$	592		$	731		$	1.47		$	1.74
Items impacting net earnings:
Realized investment (gains) losses:
Securities transactions and impairments	17			(77		)	.04			(.18		)
Certain derivative and foreign currency (gains) losses (1),(2),(3)	92			37			.23			.09
Other and non-recurring (income) loss (3)	20			0			.04			.00
Income tax (benefit) expense on items excluded from operating earnings(1),(4)	(45		)	14			(.11		)	.03
Operating earnings	676			705			1.67			1.68
Current period foreign currency impact (5)	(5		)	N/A			(.01		)	N/A
Operating earnings excluding current period foreign currency impact (6)	$	671		$	705		$	1.66		$	1.68

⁽¹⁾ Excludes hedge costs of $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, related to hedging U.S. dollar-denominated investments held in Aflac Japan which are classified as a component of operating earnings to conform to current year reporting. See "Hedge Costs" discussion below for further discussion.

⁽²⁾ Excludes a gain of $21 and $22 for the three-month periods ended March 31, 2017 and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾ Foreign currency gains (losses) for all periods have been reclassified from other income (loss) to realized investment gains (losses) - certain derivative and foreign currency gains (losses) for consistency with current period presentation.

⁽⁴⁾ Calculated using a 35% tax rate

⁽⁵⁾ Prior period foreign currency impact reflected as “N/A” to isolate change for current period only.

⁽⁶⁾ Amounts excluding current period foreign currency impact are computed using the average yen/dollar exchange rate for the comparable prior-year period, which eliminates dollar-based fluctuations driven solely from currency rate changes.

Realized Investment Gains and Losses

Our investment strategy is to invest primarily in fixed-maturity securities to provide a reliable stream of investment income, which is one of the drivers of the Company’s growth and profitability. This investment strategy incorporates asset-liability matching (ALM) to align the expected cash flows of the portfolio to the needs of the Company's liability structure. We do not purchase securities with the intent of generating capital gains or losses. However, investment gains and losses may be realized as a result of changes in the financial markets and the creditworthiness of specific issuers, tax planning strategies, and/or general portfolio management and rebalancing. The realization of investment gains and losses is independent of the underwriting and administration of our insurance products.

Securities Transactions and Impairments

Securities transactions include gains and losses from sales and redemptions of investments where the amount received is different from the amortized cost of the investment. Impairments include other-than-temporary-impairment losses on investment securities as well as changes in loan loss reserves for loan receivables.

Certain Derivative and Foreign Currency Gains (Losses)

Our derivative activities include foreign currency swaps and credit default swaps held in consolidated variable interest entities (VIEs); foreign currency forwards and options, interest rate swaptions and futures on certain fixed-maturity securities; foreign currency forwards and options that economically hedge certain portions of forecasted cash flows denominated in yen; and foreign currency swaps associated with certain senior notes and our subordinated debentures. Gains and losses are recognized as a result of valuing these derivatives, net of the effects of hedge accounting. The Company also includes the accounting impacts of remeasurement associated with changes in the yen/dollar exchange rate as a non-operating item. Certain derivative and foreign currency gains (losses) excludes hedge costs (see Hedge Cost section below) and the interest rate component of the change in fair value of foreign currency swaps on notes payable that are both classified as operating items.

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Hedge Costs

Effective January 1, 2017, operating earnings includes the impact of hedge costs incurred in using foreign currency forward contracts to hedge the foreign currency exchange risk on a portion of the U.S. dollar-denominated assets in Aflac Japan's investment portfolio. Prior year operating earnings have been revised to conform to this change. Hedge costs are derived from the difference between the foreign currency spot rate at time of trade inception and the contractual foreign currency forward rate. Beginning in 2016, we changed our non-U.S. GAAP reporting for these hedge costs by amortizing them evenly over the life of the foreign currency forward contracts. In 2016, we began increasing the duration of the foreign currency forward contracts used to hedge our U.S. dollar-denominated assets in Aflac Japan's investment portfolio to cover periods extending beyond one year. Therefore, recognizing these costs over the extended hedging periods provides a better measure of our costs, and better reflects the economics of how hedge costs emerge over the life of the hedge. For additional information regarding the change in methodology for hedge costs, see the Hedge Costs subsection of MD&A in the 2016 Annual Report.

Hedge costs can fluctuate based upon many factors, including the derivative notional amount, the length of time of the derivative contract, and changes in both U.S. and Japan interest rates. Hedge costs have increased in recent periods due to changes in the previously mentioned factors.

For additional information regarding realized investment gains and losses, see Notes 3 and 4 of the Notes to the Consolidated Financial Statements.

Other and Non-recurring Items

The United States insurance industry has a policyholder protection system that provide funds for the policyholders of insolvent insurers. The system can result in periodic charges to the Company as a result of insolvencies/bankruptcies that occur with other companies in the life insurance industry. Some states permit member insurers to recover assessments paid through full or partial premium tax offsets. These charges neither relate to the ordinary course of the Company’s business nor reflect the Company’s underlying business performance, but result from external situations not controlled by the Company.

Based on the underlying nature of these assessments, effective January 1, 2017, the Company adopted a policy of excluding any charges associated with U.S. guaranty fund assessments and the corresponding tax benefit or expense from operating earnings.

In 2009, the Pennsylvania Insurance Commissioner placed long-term care insurer Penn Treaty Network America Insurance Company and its subsidiary American Network Insurance Company (collectively referred to as Penn Treaty), neither of which is affiliated with Aflac, in rehabilitation and petitioned a state court for approval to liquidate Penn Treaty. A final order of liquidation was granted by a recognized judicial authority on March 1, 2017, and as a result, Penn Treaty is in the process of liquidation. The Company has estimated and recognized the impact of our share of guaranty fund assessments resulting from the liquidation using a discounted rate of 4.25%. We have recognized a discounted liability for the assessments of $62 million (undiscounted $94 million), offset by discounted premium tax credits of $48 million (undiscounted $74 million), for a net $14 million impact to net income for the quarter ended March 31, 2017. We expect the majority of these assessments to be paid over the next year and the majority of the tax credits to be realized over the next five years. We used the most current cost estimate provided by the National Organization of Life and Health Guaranty Associations (NOLHGA) to calculate our estimated assessments and tax credits. To the extent Medicare part D related premiums are included in the industry premiums within the latest NOLHGA annual report, our assessments estimate will increase.  Since this information is not available at this time, we cannot at this time estimate the extent of the increase, if any. We will update our accrual as new information is obtained. For additional information regarding guaranty fund assessments, see Note 12 of the Notes to the Consolidated Financial Statements.

Effective January 1, 2017, nonrecurring items also include conversion costs related to legally converting our Japan business to a subsidiary; these costs primarily consist of expenditures for banking, legal, accounting, consulting, integration of systems and processes and other similar services. These Japan branch conversion costs amounted to $6 million for the quarter ended March 31, 2017.

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Foreign Currency Translation

Aflac Japan’s premiums and approximately half of its investment income are received in yen. Claims and most expenses are paid in yen and we purchase yen-denominated assets and U.S. dollar-denominated assets, which may be hedged to yen, to support yen-denominated policy liabilities. These and other yen-denominated financial statement items are, however, translated into dollars for financial reporting purposes. We translate Aflac Japan’s yen-denominated income statement into dollars using the average exchange rate for the reporting period, and we translate its yen-denominated balance sheet using the exchange rate at the end of the period.

Due to the size of Aflac Japan, where our functional currency is the Japanese yen, fluctuations in the yen/dollar exchange rate can have a significant effect on our reported results. In periods when the yen weakens, translating yen into dollars results in fewer dollars being reported. When the yen strengthens, translating yen into dollars results in more dollars being reported. Consequently, yen weakening has the effect of suppressing current period results in relation to the comparable prior period, while yen strengthening has the effect of magnifying current period results in relation to the comparable prior period. Because changes in exchange rates distort our operating results when translated into dollars, management evaluates Aflac's financial performance excluding the impact of foreign currency translation.

Income Taxes

Our combined U.S. and Japanese effective income tax rate on pretax earnings was 34.1% for the three-month period ended March 31, 2017, compared with 34.6% for the same period in 2016. The decline in the tax rate was primarily due to the adoption of new accounting guidance related to stock compensation.

INSURANCE OPERATIONS

Aflac's insurance business consists of two segments: Aflac Japan and Aflac U.S. Aflac Japan, which operates as a branch of Aflac, is the principal contributor to consolidated earnings. U.S. GAAP financial reporting requires that a company report financial and descriptive information about operating segments in its annual and interim period financial statements. Furthermore, we are required to report a measure of segment profit or loss, certain revenue and expense items, and segment assets.

We evaluate our sales efforts using new annualized premium sales, an industry operating measure. New annualized premium sales, which include both new sales and the incremental increase in premiums due to conversions, generally represent the premiums that we would collect over a 12-month period, assuming the policies remain in force. For Aflac Japan, new annualized premium sales are determined by applications submitted during the reporting period. For Aflac U.S., new annualized premium sales are determined by applications that are issued during the reporting period. Premium income, or earned premiums, is a financial performance measure that reflects collected or due premiums that have been earned ratably on policies in force during the reporting period.

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AFLAC JAPAN SEGMENT

Aflac Japan Pretax Operating Earnings

Changes in Aflac Japan’s pretax operating earnings and profit margins are primarily affected by morbidity, mortality, expenses, persistency and investment yields. The following table presents a summary of operating results for Aflac Japan.

Aflac Japan Summary of Operating Results

	Three Months Ended March 31,
(In millions)	2017		2016
Net premium income	$	3,194	$	3,179
Net investment income:
Yen-denominated investment income	323		322
U.S. dollar-denominated investment income	286		300
Net investment income	609		622
Hedge costs related to foreign currency denominated investments	52		32
Net investment income, less amortized hedge costs	557		590
Other income (loss)	10		8
Total operating revenues	3,761		3,777
Benefits and claims, net	2,288		2,283
Operating expenses:
Amortization of deferred policy acquisition costs	154		151
Insurance commissions	184		187
Insurance and other expenses	366		350
Total operating expenses	704		688
Total benefits and expenses	2,992		2,971
Pretax operating earnings(1)	$	769	$	806
Weighted-average yen/dollar exchange rate	113.56		115.35

	In Dollars				In Yen
Percentage change over  previous period:	Three Months Ended March 31,				Three Months Ended March 31,
	2017		2016		2017		2016
Net premium income	.5	%	3.3	%	(1.1	)%	.1	%
Net investment income, less amortized hedge costs	(5.4	)	(1.7	)	(6.3	)	(5.1	)
Total operating revenues	(.4	)	2.5		(1.9	)	(.7	)
Pretax operating earnings(1)	(4.7	)	.1		(5.6	)	(3.4	)

⁽¹⁾ See the Insurance Operations section of this MD&A for our definition of segment operating expenses.

Annualized premiums in force decreased2.0% to 1.59 trillion yen as of March 31, 2017, compared with 1.62 trillion yen as of March 31, 2016. The decrease in annualized premiums in force in yen reflects the net effect of sales of new policies combined with limited-pay policies becoming paid-up and the persistency of Aflac Japan's business. Annualized premiums in force, translated into dollars at respective period-end exchange rates, were $14.1 billion at March 31, 2017, compared with $14.4 billion a year ago.

Aflac Japan's investment portfolios include U.S. dollar-denominated securities and reverse-dual currency securities (yen-denominated debt securities with dollar coupon payments). U.S. dollar-denominated investment income from these assets accounted for approximately 42% of Aflac Japan’s investment income in the first three months of 2017, compared with 45% a year ago. In years when the yen strengthens in relation to the dollar, translating Aflac Japan's U.S. dollar-denominated investment income into yen lowers growth rates for net investment income, total operating revenues, and pretax operating earnings in yen terms. In years when the yen weakens, translating U.S. dollar-denominated investment income into yen magnifies growth rates for net investment income, total operating revenues, and pretax operating

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earnings in yen terms. Excluding foreign currency changes from the prior period (a non-U.S. GAAP measure), U.S. dollar-denominated investment income accounted for approximately 43% of Aflac Japan’s investment income during the first three months of 2017, compared with 46% a year ago.

The following table illustrates the effect of translating Aflac Japan’s U.S. dollar-denominated investment income and related items into yen by comparing certain segment results with those that would have been reported had yen/dollar exchange rates remained unchanged from the comparable period in the prior year. In order to compare the current period to the prior period without the impact of foreign currency, the current period income statement is translated at the prior year's comparable period average exchange rate.

Aflac Japan Percentage Changes Over Previous Period

(Yen Operating Results)

For the Periods Ended March 31,

	Including Foreign Currency Changes						Excluding Foreign Currency Changes(2)
	Three Months						Three Months
	2017			2016			2017			2016
Net investment income, less amortized hedge costs	(6.3	)	%	(5.1	)	%	(5.5	)	%	(3.5	)	%
Total operating revenues	(1.9	)		(.7	)		(1.8	)		(.5	)
Pretax operating earnings(1)	(5.6	)		(3.4	)		(5.1	)		(2.3	)

⁽¹⁾ See the Insurance Operations section of this MD&A for our definition of segment operating earnings.

⁽²⁾ Amounts excluding foreign currency impact on U.S. dollar-denominated items (a non-U.S. GAAP measure) were determined using the same yen/dollar exchange rate for the current period as the comparable period in the prior year.

The following table presents a summary of operating ratios in yen terms for Aflac Japan.

	Three Months Ended March 31,
Ratios to total revenues:	2017		2016
Benefits and claims, net	60.8	%	60.5	%
Operating expenses:
Amortization of deferred policy acquisition costs	4.1		4.0
Insurance commissions	4.9		4.9
Insurance and other expenses	9.7		9.3
Total operating expenses	18.7		18.2
Pretax operating earnings(1)	20.5		21.3

⁽¹⁾ See the Insurance Operations section of this MD&A for our definition of segment operating earnings.

In the three-month period ended March 31, 2017, the benefit ratio remained relatively stable compared with the same respective period in the prior year, with a slight increase due to policies reaching paid-up status and lower net investment income after hedge costs. In the three-month period ended March 31, 2017, the operating expense ratio increased primarily due to activities related to sales promotions, IT infrastructure enhancement and personnel. In total, the pretax operating profit margin decreased in the three-month period ended March 31, 2017, reflecting the increase in the benefit and expense ratios. For the full year of 2017, we anticipate the pretax operating profit margin to be comparable to 2016 levels.

Aflac Japan Sales

The following table presents Aflac Japan’s new annualized premium sales for the periods ended March 31.

	In Dollars						In Yen
	Three Months						Three Months
(In millions of dollars and billions of yen)	2017			2016			2017		2016
New annualized premium sales	$	194		$	271		22.1		31.2
Increase (decrease) over prior period	(28.3		)%	19.7		%	(29.2	)%	15.5	%

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The following table details the contributions to new annualized premium sales by major insurance product for the periods ended March 31.

	Three Months
	2017		2016
Cancer	50.2	%	35.4	%
Medical	36.8		23.2
Ordinary life:
WAYS	.6		25.1
Other ordinary life	8.3		5.5
Child endowment	.9		9.1
Income support	2.0		.0
Other	1.2		1.7
Total	100.0	%	100.0	%

The foundation of Aflac Japan's product portfolio has been, and continues to be, our third sector products, which include cancer, medical and Income Support insurance products. Sales of third sector products on a yen basis increased7.6% during the first quarter of 2017, compared with the same period in 2016. We have been focusing more on promotion of our cancer and medical insurance products in this low-interest-rate environment. These products are less interest-rate sensitive and more profitable compared to first sector products.

Aflac Japan's first quarter 2017 sales results benefited from the launch of a revised EVER standard medical insurance product in February 2017 and a new Income Support Insurance product in July 2016. The Income Support Insurance product provides fixed-benefit amounts in the event that a policyholder is unable to work due to significant illness or injury and was developed to supplement the disability coverage within Japan’s social security system. This product targets young to middle-aged consumers, and by focusing our efforts on this demographic, we believe we are building relationships that lay the groundwork for the sale of our cancer and medical insurance later in life to the Income Support Insurance policyholders. With continued cost pressure on Japan’s health care system, we expect the need for third sector products will continue to rise in the future, and we remain convinced that the medical and cancer insurance products Aflac Japan provides will continue to be an important part of our product portfolio.

As a result of the interest rate policy in Japan, we have taken significant actions to limit sales of certain of Aflac Japan’s first sector products, including WAYS and child endowment. Those actions gained traction in mid-2016, and as a result first sector product sales were down81.3% in the first quarter of 2017, compared to the same period in the prior year. We expect that for the remainder of 2017, this deliberate trend will continue, and our focus will remain on less interest-sensitive third sector products.

Independent corporate agencies and individual agencies contributed 47.3% of total new annualized premium sales for Aflac Japan in the first quarter of 2017, compared with 49.7% for the same period in 2016. Affiliated corporate agencies, which include Japan Post, contributed 44.7% of total new annualized premium sales in the first quarter of 2017, compared with 35.7% in the first quarter of 2016. During the three-month period ended March 31, 2017, we recruited 45 new sales agencies. At March 31, 2017, Aflac Japan was represented by approximately 11,800 sales agencies and more than 108,000 licensed sales associates employed by those agencies.

At March 31, 2017, we had agreements to sell our products at 373 banks, approximately 90% of the total number of banks in Japan. Bank channel sales accounted for 8.0% of new annualized premium sales in the first quarter of 2017 for Aflac Japan, compared with 14.6% during the first quarter of 2016.

Japan Post has expanded the number of post offices that offer Aflac's cancer insurance products from 10,000 in the fourth quarter of 2014 to more than 20,000 postal outlets as of July 2015. We believe this alliance with Japan Post has and will further benefit our cancer insurance sales.

Japanese Regulatory Environment

In June 2013, a revision to the Financial Instruments and Exchange Act established a post-funded Orderly Resolution Regime for financial institutions to prevent a financial crisis in the event of a financial institution’s failure. This regime came

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into effect in March 2014 and has not had, and is not expected to have, a material impact on the Company's operations in Japan.

Aflac Japan Investments

The level of investment income in yen is affected by available cash flow from operations, the timing of investing the cash flow, yields on new investments, the effect of yen/dollar exchange rates on U.S. dollar-denominated investment income, and other factors.

As part of our Company's portfolio management and asset allocation process, Aflac Japan invests in U.S. dollar-denominated investments. Aflac Japan has been investing in both publicly-traded and privately originated U.S. dollar-denominated investment-grade and below-investment-grade fixed-maturity securities and loans, and has entered into foreign currency forwards and options to hedge the currency risk on the fair value of a portion of the U.S. dollar investments.

The following table details the investment purchases for Aflac Japan.

	Three Months Ended March 31,
(In millions)	2017		2016
Yen-denominated:
Fixed maturities:
Japan government and agencies	$	2,541	$	1,167
Other fixed maturities	538		60
Equities (1),(2)	149		143
Total yen-denominated	$	3,228	$	1,370
U.S. dollar-denominated:
Fixed maturities:
Other fixed maturities	$	58	$	437
Infrastructure debt (1)	30		0
Bank loans (1)	0		230
Equities (1),(2)	7		200
Other investments:
Middle market loans (1)	97		0
Commercial mortgage loans (1)	48		20
Total dollar-denominated	$	240	$	887
Total Aflac Japan purchases	$	3,468	$	2,257

⁽¹⁾Represents funding made to unit trust structures

⁽²⁾Includes rebalancing activity

Our yen-denominated private placement portfolio has declined over the last several years as a result of call and maturity activity and no reinvestment activity. However, beginning in 2016 and continuing into 2017, we began to selectively purchase yen-denominated private placements. In the first three months of 2017, Aflac Japan purchased $351 million of yen-denominated private placements, after purchasing $268 million for the full year of 2016.

See the Analysis of Financial Condition section of this MD&A for further discussion of these investment programs, and see Notes 3 and 4 of the Notes to the Consolidated Financial Statements and Notes 1, 3 and 4 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for more information regarding loans and loan receivables.

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The following table presents the results of Aflac Japan’s investment yields for the periods ended March 31.

	Three Months
	2017			2016
Total purchases for the period (in millions) (1)	$	3,468		$	2,257
New money yield (1), (2)	1.21		%	2.14		%
Return on average invested assets (3)	2.36			2.64
Portfolio book yield, including U.S. dollar-denominated investments, end of period (1)	2.57		%	2.75		%

⁽¹⁾ Includes fixed maturities and perpetual securities, loan receivables, and equities

⁽²⁾ Reported on a gross yield basis; excludes investment expenses, external management fees, and hedge costs

⁽³⁾ Net of investment expenses and hedge costs, year-to-date number reflected on a quarterly average basis

On January 1, 2016, the company revised its definition of purchases to include the reinvestment of proceeds related to unplanned sale activity. New purchases include all purchases related to fixed maturities and perpetuals, loan receivables, and equities. Securities lending/repurchase agreement activity and capital contributions to alternatives are excluded. The definition of new money yield has also been revised to reflect this change. Yields for equities are based on the assumed dividend yield at the time of purchase.

The decrease in the Aflac Japan new money yield in the three-month period ended March 31, 2017 was primarily due to the increased allocation to Japan Government Bonds (JGBs) and other high quality yen-denominated investments.

See Notes 3, 4 and 5 of the Notes to the Consolidated Financial Statements and the Analysis of Financial Condition section of this MD&A for additional information on our investments and hedging strategies.

AFLAC U.S. SEGMENT

Aflac U.S. Pretax Operating Earnings

Changes in Aflac U.S. pretax operating earnings and profit margins are primarily affected by morbidity, mortality, expenses, persistency and investment yields. The following table presents a summary of operating results for Aflac U.S.

Aflac U.S. Summary of Operating Results

	Three Months Ended March 31,
(In millions)	2017				2016
Net premium income	$	1,390			$	1,367
Net investment income	178				174
Other income	1				3
Total operating revenues	1,569				1,544
Benefits and claims	710				690
Operating expenses:
Amortization of deferred policy acquisition costs	140				141
Insurance commissions	145				146
Insurance and other expenses	264				235
Total operating expenses	549				522
Total benefits and expenses	1,259				1,212
Pretax operating earnings(1)	$	310			$	332
Percentage change over previous period:
Net premium income	1.7			%	2.1		%
Net investment income	2.0				5.1
Total operating revenues	1.7				2.3
Pretax operating earnings(1)	(6.7		)		16.6

⁽¹⁾ See the Insurance Operations section of this MD&A for our definition of segment operating earnings.

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Annualized premiums in force increased2.1% to $5.9 billion at March 31, 2017, compared with $5.7 billion at March 31, 2016.

The following table presents a summary of operating ratios for Aflac U.S.

	Three Months Ended March 31,
Ratios to total revenues:	2017		2016
Benefits and claims	45.2	%	44.7	%
Operating expenses:
Amortization of deferred policy acquisition costs	8.9		9.1
Insurance commissions	9.2		9.5
Insurance and other expenses	17.0		15.2
Total operating expenses	35.1		33.8
Pretax operating earnings(1)	19.7		21.5

⁽¹⁾See the Insurance Operations section of this MD&A for our definition of segment operating earnings.

The benefit ratio in the three-month period ended March 31, 2017, increased compared with the same period in 2016 as expected; the comparable period in 2016 had an unusually low benefit ratio compared to prior years, and 2017 returned to more historical levels. The operating expense ratio increased during the three-month period ended March 31, 2017, compared with the same period in 2016; the expense ratio in 2016 was depressed relative to the yearly expected ratio due to spending delays. In total, the pretax operating profit margin decreased in the three-month period ended March 31, 2017, compared with the same period in 2016 due to the relatively low benefit and expense ratios in the comparable period. However, for the remainder of 2017, we expect the benefit ratio to be stable compared with the full year of 2016, while expense ratios are expected to increase slightly due to increased investments in our platform.

Aflac U.S. Sales

The following table presents Aflac's U.S. new annualized premium sales for the periods ended March 31.

	Three Months
(In millions)	2017			2016
New annualized premium sales	$	333		$	328
Increase (decrease) over prior period	1.7		%	3.7		%

The following table details the contributions to new annualized premium sales by major insurance product category for the periods ended March 31.

	Three Months
	2017		2016
Income-loss protection:
Short-term disability	25.0	%	23.4	%
Life	5.4		5.6
Asset-loss protection:
Accident	29.2		30.0
Critical care(1)	20.8		21.4
Supplemental medical:
Hospital indemnity	13.8		14.0
Dental/vision	5.8		5.6
Total	100.0	%	100.0	%

⁽¹⁾ Includes cancer, critical illness, and hospital intensive care products

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New annualized premium sales for accident insurance, our leading product category, decreased.7%, short-term disability sales increased8.2%, critical care insurance sales (including cancer insurance) decreased1.0%, and hospital indemnity insurance sales increased.6% in the first quarter of 2017, compared with the same period in 2016.

The addition of group products has expanded our reach and enabled us to generate more sales opportunities with larger employers, brokers, and our traditional sales agents. We anticipate that the appeal of our group products will continue to enhance our opportunities to connect with larger businesses and their employees. Our portfolio of group and individual products offers businesses the opportunity to give their employees a more valuable and comprehensive selection of benefit options.

In the first quarter of 2017, our U.S. sales forces included more than 8,800 U.S. agents, including brokers, who were actively producing business on a weekly basis. We believe that this metric, the average weekly producer equivalent metric, allows our sales management to monitor progress and needs.

One Day Pay^SM is a claims initiative that we have focused on at Aflac U.S. to process, approve and pay eligible claims in just one day. We believe that this claims practice enhances our brand reputation and the trust our policyholders have in Aflac, and it helps Aflac stand out from competitors.

Our products provide cash benefits that can be used to help with increasing out-of-pocket medical expenses, help cover household costs, or protect against income and asset loss. Our group products and relationships with insurance brokers that handle the larger-case market are helping us as we expand our reach selling to larger businesses. We are regularly evaluating the marketplace to identify opportunities to bring the most relevant, cost-effective products to our customers. We believe the need for our products remains very strong, and we continue to work on enhancing our distribution capabilities to access employers of all sizes, including initiatives that benefit our field force and the broker community. At the same time, we are seeking opportunities to leverage our brand strength and attractive product portfolio in the evolving health care environment.

U.S. Regulatory Environment

The Affordable Care Act (ACA), federal health care reform legislation, is intended to give Americans of all ages and income levels access to comprehensive major medical health insurance and gave the U.S. federal government direct regulatory authority over the business of health insurance. The reform included major changes to the U.S. health care insurance marketplace. Among other changes, the reform legislation included an individual medical insurance coverage mandate, provided for penalties on certain employers for failing to provide adequate coverage, created health insurance exchanges, and addressed coverage and exclusions as well as medical loss ratios. It also imposed an excise tax on certain high cost plans, known as the “Cadillac tax,” that is currently scheduled to begin in 2020. The legislation also included changes in government reimbursements and tax credits for individuals and employers and alters federal and state regulation of health insurers. At this time it is unclear whether implementation of the ACA will continue. While the ACA was enacted in 2010, the major elements of the law became effective on January 1, 2014. We believe that the ACA, as enacted, does not require material changes in the design of our insurance products. However, indirect consequences of the legislation and regulations could present challenges and/or opportunities that could potentially have an impact on our sales model, financial condition and results of operations.

Title VII of the Dodd-Frank Act and regulations issued thereunder, in particular rules to require central clearing for certain types of derivatives, may have an impact on Aflac's derivative activity, including activity on behalf of Aflac Japan. In 2015 and 2016, six U.S. financial regulators, including the U.S. Commodity Futures Trading Commission (CFTC), issued final rules regarding the exchange of initial margin (IM) and variation margin (VM) for uncleared swaps that impose greater obligations on swap dealers regarding uncleared swaps with certain counterparties, such as Aflac. The requirements of such rules with respect to VM, as well as similar regulations in Europe, became effective on March 1, 2017 and are currently being phased in with respect to IM. Although the effective date was not formally postponed, certain swap dealers that are subject to the CFTC’s VM requirements have been granted transitional no-action relief from full compliance with the VM rules until September 2017 and the other regulators provided guidance indicating that they would take a risk-based approach to examining compliance with the VM rules after the March 1 effective date. Such margin requirements are expected to result in more stringent collateral requirements and to affect other aspects of Aflac's derivatives activity.

The Dodd-Frank Act also established a Federal Insurance Office (FIO) under the U.S. Treasury Department to monitor all aspects of the insurance industry and of lines of business other than certain health insurance, certain long-term care insurance and crop insurance. Traditionally, U.S. insurance companies have been regulated primarily by

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state insurance departments. In December 2013, the FIO released a report entitled "How To Modernize And Improve The System Of Insurance Regulation In The United States." The report was required by the Dodd-Frank Act, and included 18 recommended areas of near-term reform for the states, including addressing capital adequacy and safety/soundness issues, reform of insurer resolution practices, and reform of marketplace regulation. The report also listed nine recommended areas for direct federal involvement in insurance regulation. Some of the recommendations outlined in the FIO report released in December 2013 have been implemented. The National Association of Registered Agents and Brokers Reform Act, signed into law in January 2015, simplifies the agent and broker licensing process across state lines. The FIO has also engaged with the supervisory colleges to monitor financial stability and identify regulatory gaps for large national and internationally active insurers. The new presidential administration in the United States and Congress have stated proposals to reform or repeal certain provisions of the Dodd-Frank Act. We cannot predict with any degree of certainty what impact, if any, such proposals will have on our U.S. business, financial condition, or results of operations.

Under state insurance guaranty association laws and similar laws in international jurisdictions, we are subject to assessments, based on the share of business we write in the relevant jurisdiction, for certain obligations of insolvent insurance companies to policyholders and claimants. In the United States, some states permit member insurers to recover assessments paid through full or partial premium tax offsets. The Company's policy is to accrue assessments when the entity for which the insolvency relates has met its state of domicile's statutory definition of insolvency, the amount of the loss is reasonably estimable and the related premium upon which the assessment is based is written. In most states, the definition is met with a declaration of financial insolvency by a court of competent jurisdiction.

Aflac U.S. Investments

The level of investment income is affected by available cash flow from operations, the timing of investing the cash flow, yields on new investments, and other factors.

Historically, Aflac U.S. has invested primarily in investment grade corporate bonds. As part of the Company's portfolio management and asset allocation process, Aflac U.S. recently purchased other asset classes such as high yield corporate bonds, middle market loan receivables, commercial mortgage loans and infrastructure debt.

The following table details the investment purchases for Aflac U.S.

	Three Months Ended March 31,
(In millions)	2017		2016
Fixed maturities:
Other fixed maturities	$	260	$	104
Infrastructure debt	5		0
Equities	2		66
Other investments:
Middle market loans	51		111
Commercial mortgage loans	0		13
Total Aflac U.S. Purchases	$	318	$	294

See Note 3 of the Notes to the Consolidated Financial Statements and Notes 1 and 3 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for more information regarding loans and loans receivables.

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The following table presents the results of Aflac's U.S. investment yields for the periods ended March 31.

	Three Months
	2017			2016
Total purchases for period (in millions) (1)	$	318		$	294
New money yield (1), (2)	4.33		%	4.67		%
Return on average invested assets (3)	4.99			5.02
Portfolio book yield, end of period (1)	5.56		%	5.74		%

⁽¹⁾ Includes fixed maturities and perpetual securities, loan receivables, and equities

⁽²⁾ Reported on a gross yield basis; excludes investment expenses and external management fees

⁽³⁾ Net of investment expenses, year-to-date number reflected on a quarterly average basis

The decrease in the Aflac U.S. new money yield for the three-month period ended March 31, 2017 was primarily due to differences in asset allocation compared to the prior comparable period. See Notes 3 and 5 of the Notes to the Consolidated Financial Statements and the Analysis of Financial Condition section of this MD&A for additional information on our investments.

ANALYSIS OF FINANCIAL CONDITION

Our financial condition has remained strong in the functional currencies of our operations. The yen/dollar exchange rate at the end of each period is used to translate yen-denominated balance sheet items to U.S. dollars for reporting purposes.

The following table demonstrates the effect of the change in the yen/dollar exchange rate by comparing select balance sheet items as reported at March 31, 2017, with the amounts that would have been reported had the exchange rate remained unchanged from December 31, 2016.

Impact of Foreign Exchange on Balance Sheet Items

(In millions)	As   Reported			Exchange Effect			Net of         Exchange Effect(1)
Yen/dollar exchange rate(2)		112.19						116.49
Investments and cash		$	120,503		$	2,864		$	117,639
Deferred policy acquisition costs		9,255			223			9,032
Policy liabilities		97,624			3,223			94,401

⁽¹⁾Amounts excluding foreign currency changes on U.S. dollar-denominated items (a non-U.S. GAAP measure) were determined using the same yen/dollar exchange rate for the current period as the comparable period in the prior year.

⁽²⁾The exchange rate at March 31, 2017, was 112.19 yen to one dollar, or 3.8%stronger than the December 31, 2016, exchange rate of 116.49.

Investments

Our investment philosophy is to fulfill our fiduciary responsibility to invest assets in a prudent manner to meet the present and future needs of our policyholders’ contractual obligations while maximizing the long-term financial return on assets consistent with the company goal of maximizing long-term shareholder value within defined risk appetites, limits, and maintaining adequate liquidity.

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The following table details investment securities by segment.

Investments by Segment

		Aflac Japan						Aflac U.S.
(In millions)	March 31, 2017			December 31, 2016			March 31, 2017			December 31, 2016
Securities available for sale, at fair value:
Fixed maturities		$	62,850		$	59,903		$	13,585		$	13,250
Perpetual securities		1,713			1,577			57			56
Equity securities		1,218			1,185			129			124
Total available for sale		65,781			62,665			13,771			13,430
Securities held to maturity, at amortized cost:
Fixed maturities		34,401			33,350			0			0
Total held to maturity		34,401			33,350			0			0
Other investments:
Commercial mortgage loans		$	761		$	745		$	109		$	110
Middle market loans		165			74			274			245
Short-term investments		139			88			0			0
Policy loans		186			174			10			10
Other		41			0			10			0
Total other investments		1,292			1,081			403			365
Total investment securities		$	101,474		$	97,096		$	14,174		$	13,795
Cash and cash equivalents		1,177			1,313			1,457			1,428
Total investments and cash (1)		$	102,651		$	98,409		$	15,631		$	15,223

⁽¹⁾Excludes investments and cash held by the Parent Company and other business segments of $2,221 in 2017 and $2,729 in 2016.

See the Loans and Loan Receivables section in Note 3 of the Notes to the Consolidated Financial Statements for further discussion of these investments.

Cash and cash equivalents totaled $4.2 billion, or 3.5% of of total investments and cash, as of March 31, 2017, compared with $4.9 billion, or 4.2%, at December 31, 2016. For a discussion of the factors affecting our cash balance, see the Operating Activities, Investing Activities and Financing Activities subsections of this MD&A.

For additional information concerning our investments, see Notes 3, 4, and 5 of the Notes to the Consolidated Financial Statements.

The ratings of our securities referenced in the table below are based on the ratings designations provided by major Nationally Recognized Statistical Rating Organizations (NRSROs) (Moody's, S&P and Fitch) or, if not rated, are determined based on our internal analysis of such securities. For investment-grade securities where the ratings assigned by the major credit agencies are not equivalent, we use the second lowest rating that is assigned. For a description of the ratings methodology that we use when a security is below investment grade or split-rated, see "Investments, Below-Investment-Grade and Split-Rated Securities" in the Analysis of Financial Condition section of this MD&A.

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The distributions of debt and perpetual securities we own, by credit rating, were as follows:

Composition of Securities Portfolio by Credit Rating

		March 31, 2017						December 31, 2016
	Amortized Cost			Fair       Value			Amortized Cost			Fair       Value
AAA		1.2	%		1.2	%		2.0	%		1.9	%
AA		4.7			4.7			5.0			5.0
A		64.8			66.5			63.1			65.2
BBB		24.5			23.4			24.6			23.2
BB or lower		4.8			4.2			5.3			4.7
Total		100.0	%		100.0	%		100.0	%		100.0	%

As of March 31, 2017, our direct and indirect exposure to securities in our investment portfolio that were guaranteed by third parties was immaterial both individually and in the aggregate.

The following table presents the 10 largest unrealized loss positions in our portfolio as of March 31, 2017.

(In millions)	Credit Rating		Amortized Cost			Fair Value			Unrealized     Loss
Diamond Offshore Drilling Inc.		BB		$	142		$	99		$	(43	)
Noble Holdings International Ltd.		B		99			69			(30		)
Deutsche Postbank AG		BB		214			192			(22		)
AXA (1)		BBB		291			270			(21		)
Investcorp Capital Limited		BB		380			361			(19		)
Microsoft Corp.		AAA		234			217			(17		)
Kommunal Lanspensjonskasse (KLP) (1)		BBB		219			202			(17		)
Baker Hughes Inc.		BBB		123			107			(16		)
National Oilwell Varco Inc.		BBB		98			82			(16		)
Oracle Corp.		A		213			200			(13		)

⁽¹⁾ Includes perpetual security

Generally, declines in fair values can be a result of changes in interest rates, yen/dollar exchange rate, and changes in net spreads driven by a broad market move or a change in the issuer's underlying credit quality. As we believe these issuers have the ability to continue making timely payments of principal and interest, we view these changes in fair value to be temporary and do not believe it is necessary to impair the carrying value of these securities. See the Unrealized Investment Gains and Losses section in Note 3 of the Notes to the Consolidated Financial Statements for further discussions of unrealized losses related to financial institutions, including perpetual securities, and other corporate investments.

Securities by Type of Issuance

We have investments in both publicly and privately issued securities. Our ability to sell either type of security is a function of overall market liquidity which is impacted by, among other things, the amount of outstanding securities of a particular issuer or issuance, trading history of the issue or issuer, overall market conditions, and idiosyncratic events affecting the specific issue or issuer.

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The following table details investment securities by type of issuance.

Investment Securities by Type of Issuance

		March 31, 2017						December 31, 2016
(In millions)	Amortized Cost			Fair    Value			Amortized Cost			Fair   Value
Publicly issued securities:
Fixed maturities		$	79,535		$	89,560		$	75,406		$	86,132
Perpetual securities		52			78			51			75
Equity securities		1,243			1,339			1,196			1,300
Total publicly issued		80,830			90,977			76,653			87,507
Privately issued securities: (1)
Fixed maturities		25,127			28,440			24,307			27,649
Perpetual securities		1,511			1,692			1,455			1,558
Equity securities		9			10			7			9
Total privately issued		26,647			30,142			25,769			29,216
Total investment securities		$	107,477		$	121,119		$	102,422		$	116,723

⁽¹⁾ Includes Rule 144A securities

The perpetual securities we hold were largely issued by banks that are integral to the financial markets of the sovereign country of the issuer. As a result of the issuer's position within the economy of the sovereign country, our perpetual securities may be subject to a higher risk of nationalization of their issuers in connection with capital injections from an issuer's sovereign government. We cannot be assured that such capital support will extend to all levels of an issuer's capital structure. In addition, certain governments or regulators may consider imposing interest and principal payment restrictions on issuers of hybrid securities to preserve cash and preserve the issuer's capital. Beyond the cash flow impact that additional deferrals would have on our portfolio, such deferrals could result in ratings downgrades of the affected securities, which in turn could result in a reduction of fair value of the securities and increase our regulatory capital requirements. We consider these factors in our credit review process.

The following table details our privately issued investment securities.

Privately Issued Securities

(Amortized cost, in millions)	March 31, 2017				December 31, 2016
Privately issued securities as a percentage of total investment securities		24.8		%		25.2		%
Privately issued securities held by Aflac Japan		$	23,912			$	23,104
Privately issued securities held by Aflac Japan as a percentage of total investment securities		22.2		%		22.6		%

Reverse-Dual Currency Securities⁽¹⁾ 

(Amortized cost, in millions)	March 31, 2017				December 31, 2016
Privately issued reverse-dual currency securities		$	5,844			$	5,628
Publicly issued collateral structured as reverse-dual currency securities		1,400				1,349
Total reverse-dual currency securities		$	7,244			$	6,977
Reverse-dual currency securities as a percentage of total investment securities		6.7		%		6.8		%

⁽¹⁾ Principal payments in yen and interest payments in dollars

Aflac Japan has a portfolio of privately issued securities to better match liability characteristics and secure higher yields than those available on Japanese government or other public corporate bonds.Aflac Japan’s investments in yen-denominated privately issued securities consist primarily of non-Japanese issuers, are rated investment grade at

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purchase and have longer maturities, thereby allowing us to improve our asset/liability matching and our overall investment returns. These securities are generally either privately negotiated arrangements or issued under medium-term note programs and have standard documentation commensurate with credit ratings of the issuer, except when internal credit analysis indicates that additional protective and/or event-risk covenants were required. Many of these investments have protective covenants appropriate to the specific investment. These may include a prohibition of certain activities by the borrower, maintenance of certain financial measures, and specific conditions impacting the payment of our notes.

Below-Investment-Grade and Split-Rated Securities

We use specific criteria to judge the credit quality of both existing and prospective investments. The ratings referenced in the tables below are based on the ratings designations provided by the major credit rating agencies(Moody's, S&P, and Fitch) or, if not rated, are determined based on our internal credit analysis of such securities. When the ratings issued by the rating agencies differ, we utilize the second lowest rating, regardless of how many of the three rating agencies actually rated the instrument. Split-rated securities are those where the ratings are not equivalent and one or more of the ratings is investment grade and one or more is below investment grade. For these split-rated securities, if there are only two ratings assigned by the credit rating agencies, we take the lower below-investment-grade rating. If there are three ratings assigned, and two of the three are below investment grade, we consider it a below-investment grade security. If there are three ratings and two are investment grade, we consider it an investment grade security unless our evaluation and assessment shows a below-investment-grade rating is warranted despite two of the three rating agencies rating it investment grade.

Our portfolio of below-investment-grade securities includes debt securities purchased while the issuer was rated investment grade plus other loans and bonds purchased as part of an allocation to that segment of the market. The following is our below-investment-grade exposure in accordance with the above described rating methodology.

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Below-Investment-Grade Investments

	March 31, 2017									December 31, 2016
(In millions)	Par Value		Amortized Cost		Fair Value		Unrealized Gain (Loss)			Par Value		Amortized Cost		Fair Value		Unrealized Gain(Loss)
Investcorp Capital Limited	$	380	$	380	$	361	$	(19	)	$	368	$	368	$	346	$	(22	)
Navient Corp.	297		158		195		37			287		152		197		45
Republic of Tunisia	267		157		178		21			318		191		264		73
KLM Royal Dutch Airlines (1)	267		196		219		23			257		189		213		24
Barclays Bank PLC (1)	242		158		230		72			236		152		221		69
Deutsche Postbank AG	214		214		192		(22		)	206		206		179		(27		)
Telecom Italia SpA	178		178		221		43			172		172		212		40
Generalitat de Catalunya	143		52		108		56			154		57		111		54
Diamond Offshore Drilling Inc.	124		142		99		(43		)	124		141		96		(45		)
IKB Deutsche Industriebank AG	116		49		98		49			112		47		91		44
Alcoa, Inc.	100		83		100		17			100		80		97		17
Noble Holdings International Ltd.	95		99		69		(30		)	95		98		68		(30		)
Petrobras International Finance Company	91		90		89		(1		)	91		90		83		(7		)
EMC Corp.	85		86		78		(8		)	85		86		76		(10		)
Teck Resources Ltd.	70		75		68		(7		)	70		73		66		(7		)
Transocean Inc.	68		72		61		(11		)	68		72		57		(15		)
CF Industries Inc.	60		59		57		(2		)	60		59		54		(5		)
Votorantim OverseasTrading IV Ltd.	50		49		55		6			50		49		54		5
UPM-Kymmene	*		*		*		*			180		178		188		10
Cenovus Energy Inc.	*		*		*		*			75		78		71		(7		)
Other Issuers (below $50 million in par value)	333		325		322		(3		)	333		321		309		(12		)
Subtotal (2)	3,180		2,622		2,800		178			3,441		2,859		3,053		194
Senior secured bank loans	1,651		1,719		1,654		(65		)	1,758		1,855		1,764		(91		)
High yield corporate bonds	614		614		629		15			614		602		624		22
Middle market loans, net of reserves (3)	446		439		440		1			324		319		320		1
Grand Total	$	5,891	$	5,394	$	5,523	$	129		$	6,137	$	5,635	$	5,761	$	126

* Investment grade at respective reporting date

⁽¹⁾ Includes perpetual security

⁽²⁾ Securities initially purchased as investment grade, but have subsequently been downgraded to below investment grade

⁽³⁾ Middle market loans are carried at amortized cost

We invest in senior secured bank loans and middle market loans primarily to U.S. corporate borrowers, most of which have below-investment-grade ratings. The bank loan and middle market loan investment programs are managed externally by third party firms specializing in this asset class and require a minimum average portfolio rating of low BB and a minimum single investment rating of low B from one of the NRSROs. The objectives of these programs include enhancing the yield on invested assets, achieving further diversification of credit risk, and mitigating the risk of rising interest rates and hedge costs through the acquisition of floating rate assets. Our investments in these programs totaled $2.3 billion at March 31, 2017 and December 31, 2016, respectively, on an amortized cost basis.

The Company maintains an allocation to higher yielding corporate bonds within the Aflac Japan and Aflac U.S. portfolios. Most of these securities were rated below-investment-grade at the time of purchase, but we also purchased several that were rated investment grade which, because of market pricing, offer yields commensurate with below-investment-grade risk profiles. The objective of this allocation was to enhance our yield on invested assets and further diversify our credit risk. All investments must have a minimum rating of low BB using our above described rating methodology and are managed by our internal credit portfolio management team.

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Investments in Certain European Countries

We own debt of various European issuers including corporate and government-related borrowers. Most European countries have seen improvement in their economies since the European debt crisis which has helped stabilized credit quality among European issuers. To support sustainable economic growth, the European Central Bank (ECB) in 2015 launched a quantitative easing (QE) stimulus program that was recently extended to December 2017, with reduced purchases to start in April 2017.

The 2016 referendum in the United Kingdom (UK) in favor of the UK withdrawing from the European Union (EU) (Brexit) has added a new level of uncertainty to Europe’s economic recovery, although financial markets have stabilized after initially reacting to Brexit with increased volatility. We cannot estimate the ultimate impact of Brexit, which may include changes to the economies of the UK and other EU countries, policy action by the UK government, the Bank of England, the EU, or the ECB, or an increase in economic isolationism throughout Europe and the rest of the world.

We continue to monitor the European situation closely. Additionally, some of our European fixed-maturity investments contain covenants that we believe mitigate our risk. These may include put options that allow us to return our holdings to the issuer at a predetermined price, usually par, should the issuer be downgraded to below investment grade by a rating agency. Additionally, these covenants may include restrictions on the ability of the issuer to incur additional debt, sell assets, or provide collateral for indebtedness. As of March 31, 2017, all of the European issuers in our portfolios were current on their obligations to us, and we believe they have the ability to meet their obligations to us.

Hedging Activities

Aflac Japan’s U.S. Dollar-Denominated Investments

Most of Aflac Japan's cash, investments, and liabilities are yen-denominated.  However, Aflac Japan also owns U.S. dollar-denominated investments, a portion of which we hedge with foreign currency forwards and options.  As of March 31, 2017, the cost or amortized cost of yen-denominated investments and U.S. dollar-denominated investments in Aflac Japan was $72.4 billion and $22.8 billion, respectively. As of March 31, 2017, we had hedged $16.4 billion of the U.S. dollar-denominated investments, with the remaining amount of the U.S. dollar-denominated investments being unhedged.

Net Investment Hedge

Our investment in Aflac Japan is affected by changes in the yen/dollar exchange rate. To mitigate this exposure, we have taken several courses of action. First, Aflac Japan maintains certain unhedged U.S. dollar-denominated securities, which serve as an economic currency hedge of a portion of our investment in Aflac Japan. Second, we have designated the majority of the Parent Company’s yen-denominated liabilities (notes payable and loans) as non-derivative hedging instruments and certain foreign currency forwards and options as derivative hedges of our net investment in Aflac Japan. We make our net investment hedge designation at the beginning of each quarter. If the total of the designated Parent Company non-derivative and derivatives notional is equal to or less than our net investment in Aflac Japan, the hedge is deemed to be effective, and the exchange effect on the yen-denominated liabilities and the change in estimated fair value of the derivatives are reported in the unrealized foreign currency component of other comprehensive income. We estimate that if the designated net investment hedge positions exceeded our net investment in Aflac Japan by 10 billion yen, we would report a foreign exchange gain/loss of approximately $1 million for every 1% yen weakening/strengthening in the end-of-period yen/dollar exchange rate. Our net investment hedge was effective during the three-month periods ended March 31, 2017 and 2016, respectively.

The yen net asset figure calculated for hedging purposes differs from the yen-denominated net asset position as discussed in the Currency Risk section of Item 7A., Quantitative and Qualitative Disclosures about Market Risk, in the 2016 Annual Report. As disclosed in that section, the consolidation of the underlying assets in certain VIEs requires that we derecognize our yen-denominated investment in the VIE and recognize the underlying fixed-maturity or perpetual securities and cross-currency swaps. While these U.S. dollar investments will create foreign currency fluctuations, the combination of the U.S. dollar-denominated investment and the cross-currency swap economically creates a yen-denominated investment that qualifies for inclusion as a component of our investment in Aflac Japan. Similarly, the combination of the U.S. corporate bonds and the foreign currency forwards and options that we have entered into, as discussed in the Aflac Japan Investment subsection of MD&A, economically creates a yen-denominated investment that qualifies for inclusion as a component of our investment in Aflac Japan.

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The dollar values of our yen-denominated net assets, including economic yen-denominated investments for net investment hedging purposes as discussed above, are summarized as follows (translated at end-of-period exchange rates):

(In millions)	March 31, 2017				December 31, 2016
Aflac Japan net assets		$	16,431			$	16,215
Aflac Japan unhedged U.S. dollar-denominated net assets		(9,912		)		(9,694		)
Consolidated yen-denominated net assets (liabilities)		$	6,519			$	6,521

For the hedge of our net investment in Aflac Japan, we have designated certain of the Parent Company's yen-denominated liabilities, certain unhedged U.S. dollar investments and foreign currency forwards and options as a hedge of our net investment in Aflac Japan. Our consolidated yen-denominated net asset position was partially hedged at $2.0 billion as of March 31, 2017, compared with $1.3 billion as of December 31, 2016.

See Note 4 of the Notes to the Consolidated Financial Statements for additional information on our hedging activities.

Deferred Policy Acquisition Costs

The following table presents deferred policy acquisition costs by segment.

(In millions)	March 31, 2017			December 31, 2016			% Change
Aflac Japan		$	6,028		$	5,765		4.6	%	(1)
Aflac U.S.		3,227			3,228			0.0
Total		$	9,255		$	8,993		2.9	%

⁽¹⁾Aflac Japan’s deferred policy acquisition costs increased .7% in yen during the three months ended March 31, 2017.

See Note 6 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for additional information on our deferred policy acquisition costs.

Policy Liabilities

The following table presents policy liabilities by segment.

(In millions)	March 31, 2017				December 31, 2016				% Change
Aflac Japan		$	87,966			$	84,141			4.5	%	(1)
Aflac U.S.		10,300				10,212				.9
Other		107				91				17.6
Intercompany eliminations(2)		(749		)		(718		)		4.3
Total		$	97,624			$	93,726			4.2	%

⁽¹⁾ Aflac Japan’s policy liabilities increased .7% in yen during the three months ended March 31, 2017.

⁽²⁾ Elimination entry necessary due to recapture of a portion of policy liabilities ceded externally, as a result of the reinsurance retrocession transaction as described in Note 7 of the Notes to the Consolidated Financial Statements.

Notes Payable

Notes payable totaled $5.3 billion at March 31, 2017, compared with $5.4 billion as at December 31, 2016.

In January 2017, the Parent Company issued 60.0 billion yen of senior notes through a U.S. public debt offering. The notes bear interest at a fixed rate of .932% per annum, payable semi-annually, and have a 10-year maturity. These notes may only be redeemed before maturity, in whole but not in part, upon the occurrence of certain changes affecting U.S. taxation, as specified in the indenture governing the terms of the issuance.

In February 2017, the Parent Company extinguished $650 million of 2.65% senior notes upon their maturity.

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See Note 8 of the accompanying Notes to the Consolidated Financial Statements for additional information on our notes payable.

Benefit Plans

Aflac Japan and Aflac U.S. have various benefit plans. For additional information on our Japanese and U.S. plans, see Note 11 of the accompanying Notes to the Consolidated Financial Statements and Note 14 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

Policyholder Protection

Policyholder Protection Corporation

The Japanese insurance industry has a policyholder protection system that provides funds for the policyholders of insolvent insurers. Legislation enacted regarding the framework of the Life Insurance Policyholder Protection Corporation (LIPPC) included government fiscal measures supporting the LIPPC. On March 30, 2012, the Diet approved legislation to enhance the stability of the LIPPC by extending the government's fiscal support of the LIPPC through March 2017. On November 25, 2016, Japan's Diet passed legislation that again extends the government's fiscal support of the LIPPC through March 2022. Effective April 2014, the annual LIPPC contribution amount for the total life industry was lowered from 40 billion yen to 33 billion yen.

Guaranty Fund Assessments

Under state guaranty association laws, certain insurance companies can be assessed (up to prescribed limits) for certain obligations to the policyholders and claimants of impaired or insolvent insurance companies that write the same line or similar lines of business. The amount of the guaranty fund assessment that an insurer is assessed is based on its proportionate share of premiums in that state.

As of March 31, 2017, the Company has estimated and recognized the impact of our share of guaranty fund assessments resulting from the liquidation of a long-term care insurer. See Note 12 of the Notes to the Consolidated Financial Statements for further information on the assessment.

Off-Balance Sheet Arrangements

As of March 31, 2017, we had no material letters of credit, standby letters of credit, guarantees or standby repurchase obligations. See Note 15 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report, for information on material unconditional purchase obligations that are not recorded on our balance sheet.

CAPITAL RESOURCES AND LIQUIDITY

Aflac provides the primary sources of liquidity to the Parent Company through dividends and management fees. The following table presents the amounts provided for the three-month periods ending March 31.

Liquidity Provided by Aflac to Parent Company

(In millions)	2017		2016
Dividends declared or paid by Aflac	$	400	$	0
Management fees paid by Aflac	80		60

The primary uses of cash by the Parent Company are shareholder dividends, the repurchase of its common stock and interest on its outstanding indebtedness and operating expenses. The Parent Company's sources and uses of cash are reasonably predictable and are not expected to change materially in the future. For additional information, see the Financing Activities subsection of this MD&A.

The Parent Company also accesses debt security markets to provide additional sources of capital. In August 2016, we filed a shelf registration statement with Japanese regulatory authorities that allows us to conduct public offerings of bonds in Japan, including yen-denominated Samurai notes, up to 200 billion yen or its equivalent through August 2018. The shelf registration statement is for possible public offerings in Japan, but the bonds issued under the shelf may be transferred by the bondholders to U.S. persons in compliance with U.S. law. We filed a shelf registration statement with the SEC in May

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2015 that allows us to issue an indefinite amount of senior and subordinated debt, in one or more series, from time to time until May 2018. We believe outside sources for additional debt and equity capital, if needed, will continue to be available. For additional information, see Note 8 of the Notes to the Consolidated Financial Statements.

The principal sources of cash for our insurance operations are premiums and investment income. The primary uses of cash by our insurance operations are investments, policy claims, commissions, operating expenses, income taxes and payments to the Parent Company for management fees and dividends. Both the sources and uses of cash are reasonably predictable.

When making an investment decision, our first consideration is based on product needs. Our investment objectives provide for liquidity through the purchase of investment-grade debt securities. These objectives also take into account duration matching, and because of the long-term nature of our business, we have adequate time to react to changing cash flow needs.

As a result of policyholder aging, claims payments are expected to gradually increase over the life of a policy. Therefore, future policy benefit reserves are accumulated in the early years of a policy and are designed to help fund future claims payments. We expect our future cash flows from premiums and our investment portfolio to be sufficient to meet our cash needs for benefits and expenses.

The Parent Company and Aflac have a 364-day uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $100 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. Borrowings under the financing agreement will mature no later than three months after the last drawdown date of October 14, 2017. As of March 31, 2017, we did not have any borrowings outstanding under our $100 million credit agreement.

The Parent Company has a three-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 100.0 billion yen on a revolving basis. Borrowings bear interest at a rate per annum equal to the Tokyo interbank market rate (TIBOR) plus, at our option, either (a) the applicable TIBOR margin during the period from the closing date to the commitment termination date or (b) the applicable TIBOR margin during the term out period. The applicable margin ranges between .35% and .75% during the period from the closing date to the commitment termination date and .70% and 1.50% during the term out period, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company is required to pay a facility fee on the commitments ranging between .30% and .50%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under this credit agreement may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company, and will expire on the earlier of (a) March 31, 2019, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. The credit facility requires compliance with certain financial covenants on a quarterly basis. As of March 31, 2017, we did not have any borrowings outstanding under our 100.0 billion yen revolving credit agreement.

The Parent Company and Aflac have a five-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 55.0 billion yen or the equivalent of yen in U.S. dollars on a revolving basis. This credit agreement provides for borrowings in Japanese yen or the equivalent of Japanese yen in U.S. dollars on a revolving basis. Borrowings bear interest at a rate per annum equal to, at our option, either (a) a eurocurrency rate determined by reference to the LIBOR for the interest period relevant to such borrowing adjusted for certain additional costs or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus ½ of 1%, (2) the rate of interest for such day announced by Mizuho Bank, Ltd. as its prime rate and (3) the eurocurrency rate for an interest period of one month plus 1.00%, in each case plus an applicable margin. The applicable margin ranges between .79% and 1.275% for eurocurrency rate borrowings and 0.0% and .275% for base rate borrowings, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company and Aflac are required to pay a facility fee on the commitments ranging between .085% and .225%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under the amended and restated credit facility may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company and Aflac. The amended and restated credit facility requires compliance with certain financial covenants on a quarterly basis and will expire on the earlier of (a) September 18, 2020, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. As of March 31, 2017, we did not have any borrowings outstanding under our 55.0 billion yen revolving credit agreement.

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The Parent Company and Aflac have an uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $50 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. As of March 31, 2017, we did not have any borrowings outstanding under our $50 million credit agreement.

Our financial statements convey our financing arrangements during the periods presented. We have not engaged in material intra-period short-term financings during the periods presented that are not otherwise reported in our balance sheet. We were in compliance with all of the covenants of our notes payable and lines of credit at March 31, 2017. We have not entered into transactions involving the transfer of financial assets with an obligation to repurchase financial assets that have been accounted for as a sale under applicable accounting standards, including securities lending transactions. See Notes 3 and 4 of the Notes to the Consolidated Financial Statements and Notes 1, 3, and 4 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report, for more information on our securities lending and derivative activities. With the exception of disclosed activities in those referenced footnotes, we do not have a known trend, demand, commitment, event or uncertainty that would reasonably result in our liquidity increasing or decreasing by a material amount. Our cash and cash equivalents include unrestricted cash on hand, money market instruments, and other debt instruments with a maturity of 90 days or less when purchased, all of which has minimal market, settlement or other risk exposure.

Consolidated Cash Flows

We translate cash flows for Aflac Japan’s yen-denominated items into U.S. dollars using weighted-average exchange rates. In periods when the yen weakens, translating yen into dollars causes fewer dollars to be reported. When the yen strengthens, translating yen into dollars causes more dollars to be reported.

The following table summarizes consolidated cash flows by activity for the three-month periods ended March 31.

(In millions)	2017			2016
Operating activities	$	1,757		$	1,331
Investing activities	(1,527		)	(1,487		)
Financing activities	(876		)	(766		)
Exchange effect on cash and cash equivalents	(8		)	21
Net change in cash and cash equivalents	$	(654	)	$	(901	)

Operating Activities

The following table summarizes operating cash flows by source for the three-month periods ended March 31. 

(In millions)	2017		2016
Aflac Japan	$	1,311	$	1,042
Aflac U.S. and other operations	446		289
Total	$	1,757	$	1,331

Investing Activities

Operating cash flow is primarily used to purchase debt securities to meet future policy obligations. The following table summarizes investing cash flows by source for the three-month periods ended March 31.

(In millions)	2017			2016
Aflac Japan	$	(1,191	)	$	(1,129	)
Aflac U.S. and other operations	(336		)	(358		)
Total	$	(1,527	)	$	(1,487	)

Prudent portfolio management dictates that we attempt to match the duration of our assets with the duration of our liabilities. Currently, when our fixed-maturity securities and perpetual securities mature, the proceeds may be reinvested at a yield below that required for the accretion of policy benefit liabilities on policies issued in earlier years. However, the long-term nature of our business and our strong cash flows provide us with the ability to minimize the effect of mismatched durations and/or yields identified by various asset adequacy analyses. When needed or when market

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opportunities arise, we dispose of selected fixed-maturity and perpetual securities that are available for sale to improve the duration matching of our assets and liabilities, improve future investment yields, and/or re-balance our portfolio. As a result, dispositions before maturity can vary significantly from year to year. Dispositions before maturity were approximately 2% and .4% of the year-to-date average investment portfolio of fixed maturities and perpetual securities available for sale during the three-month periods ended March 31, 2017 and 2016, respectively.

Financing Activities

Consolidated cash used by financing activities was $876 million in the first three months of 2017, compared with consolidated cash used by financing activities of $766 million for the same period of 2016.

In January 2017, the Parent Company issued 60.0 billion yen of senior notes through a U.S. public debt offering. The notes bear interest at a fixed rate of .932% per annum, payable semi-annually, and have a 10-year maturity. These notes may only be redeemed before maturity, in whole but not in part, upon the occurrence of certain changes affecting U.S. taxation, as specified in the indenture governing the terms of the issuance.

In February 2017, the Parent Company extinguished $650 million of 2.65% senior notes upon their maturity.

Cash returned to shareholders through dividends and treasury stock purchases was $776 million during the three-month period ended March 31, 2017, compared with $779 million during the three-month period ended March 31, 2016.

We were in compliance with all of the covenants of our notes payable and lines of credit at March 31, 2017.

The following tables present a summary of treasury stock activity during the three-month periods ended March 31.

Treasury Stock Purchased

(In millions of dollars and thousands of shares)	2017		2016
Treasury stock purchases	$	610	$	612
Number of shares purchased:
Open market	8,493		10,152
Other	144		189
Total shares purchased	8,637		10,341

Treasury Stock Issued

(In millions of dollars and thousands of shares)	2017		2016
Stock issued from treasury:
Cash financing	$	11	$	7
Noncash financing	14		18
Total stock issued from treasury	$	25	$	25
Number of shares issued	395		486

During the first three months of 2017, we repurchased 8.5 million shares of our common stock for $600 million as part of our share repurchase program. As of March 31, 2017, a remaining balance of 18.3 million shares of our common stock was available for purchase under share repurchase authorizations by our board of directors. We currently plan to repurchase $1.3 billion to $1.5 billion of our common stock in 2017, front-end loaded in the first half of the year, assuming stable capital conditions and absent compelling alternatives.

Cash dividends paid to shareholders were $.43 per share in the first quarter of 2017, compared with $.41 per share in the first quarter of 2016. The following table presents the dividend activity for the three-month periods ended March 31.

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(In millions)	2017		2016
Dividends paid in cash	$	166	$	167
Dividends through issuance of treasury shares	7		6
Total dividends to shareholders	$	173	$	173

In April 2017, the board of directors declared the second quarter cash dividend of $.43 per share, an increase of 4.9% compared with the same period in 2016. The dividend is payable on June 1, 2017, to shareholders of record at the close of business on May 24, 2017.

Regulatory Restrictions

Aflac and CAIC are domiciled in Nebraska and are subject to its regulations. A life insurance company’s statutory capital and surplus is determined according to rules prescribed by the National Association of Insurance Commissioners (NAIC), as modified by the insurance department in the insurance company’s state of domicile. Statutory accounting rules are different from U.S. GAAP and are intended to emphasize policyholder protection and company solvency. Similar laws apply in New York, the domiciliary jurisdiction of the Parent Company's other insurance subsidiary, Aflac New York. The continued long-term growth of our business may require increases in the statutory capital and surplus of our insurance operations. Aflac’s insurance operations may secure additional statutory capital through various sources, such as internally generated statutory earnings, equity contributions by the Parent Company from funds generated through debt or equity offerings, or reinsurance transactions. The NAIC’s risk-based capital (RBC) formula is used by insurance regulators to help identify inadequately capitalized insurance companies. The RBC formula quantifies insurance risk, business risk, asset risk and interest rate risk by weighing the types and mixtures of risks inherent in the insurer’s operations. As of March 31, 2017, Aflac’s RBC ratio remains high and reflects a strong capital and surplus position. The maximum amount of dividends that can be paid to the Parent Company by Aflac without prior approval of Nebraska's director of insurance is the greater of the net income from operations, which excludes net realized investment gains, for the previous year determined under statutory accounting principles, or 10% of statutory capital and surplus as of the previous year-end. Dividends declared by Aflac during 2017 in excess of $2.8 billion would require such approval.

In addition to limitations and restrictions imposed by U.S. insurance regulators, Japan’s Financial Services Agency (FSA) may not allow profit repatriations from Aflac Japan if the transfers would cause Aflac Japan to lack sufficient financial strength for the protection of policyholders. The FSA maintains its own solvency standard which is quantified through the solvency margin ratio (SMR). Aflac Japan's SMR is sensitive to interest rate, credit spread, and foreign exchange rate changes, therefore we continue to evaluate alternatives for reducing this sensitivity. In the event of a rapid change in market risk conditions causing SMR to decline, we have two senior unsecured revolving credit facilities in the amounts of 100 billion yen and 55 billion yen, respectively, and a committed reinsurance facility in the amount of approximately 110 billion yen as a capital contingency plan. (See Notes 8 and 9 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for additional information on our capital contingency plan.) We have already undertaken various measures to mitigate the sensitivity of Aflac Japan's SMR. For example, we employ policy reserve matching (PRM) investment strategies, which is a Japan-specific accounting treatment that reduces SMR interest rate sensitivity since PRM-designated investments are carried at amortized cost consistent with corresponding liabilities. For U.S. GAAP, PRM investments are categorized as available-for-sale. We also use foreign currency derivatives to hedge a portion of our U.S. dollar-denominated investments. In the first quarter of 2015, Aflac Japan entered into a quota share arrangement to cede a portion of hospital benefits of one of our closed products. Under this coinsurance indemnity type of reinsurance, Aflac Japan released approximately 130 billion yen of FSA reserves. (See Notes 3, 4 and 8 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for additional information on our investment strategies, hedging activities, and reinsurance, respectively.) As of March 31, 2017, Aflac Japan's SMR remains high and reflects a strong capital position. The FSA has been conducting field testing with the insurance industry concerning the introduction of an economic value-based solvency regime. The field testing will assist the FSA in determining if an economic value-based solvency regime in Japan will be appropriate for the insurance industry.

Payments are made from Aflac Japan to the Parent Company for management fees and to Aflac U.S. for allocated expenses and remittances of earnings. The following table details Aflac Japan remittances for the three-month periods ended March 31.

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Aflac Japan Remittances

(In millions of dollars and billions of yen)	2017		2016
Aflac Japan management fees paid to Parent Company	$	28	$	13
Expenses allocated to Aflac Japan (in dollars)	32		33
Aflac Japan profit remittances to Aflac U.S. (in dollars)	275		219
Aflac Japan profit remittances to Aflac U.S. (in yen)	31.3		25.0

For additional information on regulatory restrictions on dividends, profit repatriations and other transfers, see Note 13 of the Notes to the Consolidated Financial Statements and the Regulatory Restrictions subsection of MD&A, both in the 2016 Annual Report.

Other

For information regarding commitments and contingent liabilities, see Note 12 of the Notes to the Consolidated Financial Statements.

Additional Information

Investors should note that we announce material financial information in our SEC filings, press releases and public conference calls. In accordance with SEC guidance, we may also use the Investor Relations section of our website (http://investors.aflac.com) to communicate with investors about the Company. It is possible that the financial and other information we post there could be deemed to be material information. The information on our website is not part of this document.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are exposed primarily to the following types of market risks: currency risk, interest rate risk, credit risk and equity risk. We regularly monitor our market risks and use a variety of strategies to manage our exposure to these market risks. A description of our market risk exposures may be found under “Quantitative and Qualitative Disclosures About Market Risk” in Part II, Item 7A, of the 2016 Annual Report. There have been no material changes to our market risk exposures from the market risk exposures previously disclosed in the 2016 Annual Report.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

The Company’s management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this quarterly report (the “Evaluation Date”). Based on such evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that, as of the Evaluation Date, the Company’s disclosure controls and procedures are effective.

Changes in Internal Control Over Financial Reporting

There have not been any changes in the Company’s internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) during the first fiscal quarter of 2017 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

During the first three months of 2017, we repurchased shares of Aflac common stock as follows:

Period	Total Number of Shares Purchased		Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum     Number of     Shares that     May Yet Be     Purchased     Under the     Plans or     Programs
January 1 - January 31	3,819,299		$	69.94	3,819,299	22,934,155
February 1 - February 28	1,988,420		70.03		1,853,000	21,081,155
March 1 - March 31	2,825,614		72.12		2,821,009	18,260,146
Total	8,633,333	(2)	$	70.67	8,493,308	18,260,146	(1)

⁽¹⁾The total remaining shares available for purchase at March 31, 2017, consisted of 18,260,146 shares related to a 40,000,000 share repurchase authorization by the board of directors announced in 2015.

⁽²⁾During the first three months of 2017, 140,025 shares were purchased in connection with income tax withholding obligations related to the vesting of restricted-share-based awards during the period.

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Item 6. Exhibits

(a)	EXHIBIT INDEX
	3.0	-	Articles of Incorporation, as amended – incorporated by reference from Form 10-Q for June 30, 2008, Exhibit 3.0 (File No. 001-07434).
	3.1	-	Bylaws of the Corporation, as amended and restated – incorporated by reference from Form 8-K dated November 10, 2015, Exhibit 3.1 (File No. 001-07434).
	4.0	-	There are no instruments with respect to long-term debt not being registered in which the total amount of securities authorized exceeds 10% of the total assets of Aflac Incorporated and its subsidiaries on a consolidated basis. We agree to furnish a copy of any long-term debt instrument to the Securities and Exchange Commission upon request.
	4.1	-	Indenture, dated as of May 21, 2009, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee – incorporated by reference from Form 8-K dated May 21, 2009, Exhibit 4.1 (File No. 001-07434).
	4.2	-	Second Supplemental Indenture, dated as of December 17, 2009, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 6.900% Senior Note due 2039) – incorporated by reference from Form 8-K dated December 14, 2009, Exhibit 4.1 (File No. 001-07434).
	4.3	-	Third Supplemental Indenture, dated as of August 9, 2010, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 6.45% Senior Note due 2040) - incorporated by reference from Form 8-K dated August 4, 2010, Exhibit 4.1 (File No. 001-07434).
	4.4	-	Fifth Supplemental Indenture, dated as of February 10, 2012, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 2.65% Senior Note due 2017) - incorporated by reference from Form 8-K dated February 8, 2012, Exhibit 4.1 (File No. 001-07434).
	4.5	-	Sixth Supplemental Indenture, dated as of February 10, 2012, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 4.00% Senior Note due 2022) - incorporated by reference from Form 8-K dated February 8, 2012, Exhibit 4.2 (File No. 001-07434).
	4.6	-	Seventh Supplemental Indenture, dated as of July 31, 2012, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 2.65% Senior Note due 2017) - incorporated by reference from Form 8-K dated July 27, 2012, Exhibit 4.1 (File No. 001-07434).
	4.7	-	Eighth Supplemental Indenture, dated as of June 10, 2013, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 3.625% Senior Note due 2023) - incorporated by reference from Form 8-K dated June 10, 2013, Exhibit 4.1 (File No. 001-07434).
	4.8	-	Ninth Supplemental Indenture, dated as of November 7, 2014, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 3.625% Senior Note due 2024) - incorporated by reference from Form 8-K dated November 4, 2014, Exhibit 4.1 (File No. 001-07434).
	4.9	-	Tenth Supplemental Indenture, dated as of March 12, 2015, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 2.40% Senior Note due 2020) - incorporated by reference from Form 8-K dated March 9, 2015, Exhibit 4.1 (File No. 001-07434).
	4.10	-	Eleventh Supplemental Indenture, dated as of March 12, 2015, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 3.25% Senior Note due 2025) - incorporated by reference from Form 8-K dated March 9, 2015, Exhibit 4.2 (File No. 001-07434).
	4.11	-	Twelfth Supplemental Indenture, dated as of September 19, 2016, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 2.875% Senior Note due 2026) - incorporated by reference from Form 8-K dated September 19, 2016, Exhibit 4.1 (File No. 001-07434).
	4.12	-	Thirteenth Supplemental Indenture, dated as of September 19, 2016, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 4.000% Senior Note due 2046) - incorporated by reference from Form 8-K dated September 19, 2016, Exhibit 4.2 (File No. 001-07434).
	4.13	-	Fourteenth Supplemental Indenture, dated as of January 25, 2017, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of .932% Senior Note due 2027) – incorporated by reference from Form 8-K dated January 25, 2017, Exhibit 4.1 (File No. 001-07434).

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4.14	-	Subordinated Indenture, dated as of September 26, 2012, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee - incorporated by reference from Form 8-K dated September 26, 2012, Exhibit 4.1 (File No. 001-07434).
4.15	-	First Supplemental Indenture, dated as of September 26, 2012, between Aflac Incorporated and The Bank of New York Mellon Trust Company, N.A., as trustee (including the form of 5.50% Subordinated Debenture due 2052) - incorporated by reference from Form 8-K dated September 26, 2012, Exhibit 4.2 (File No. 001-07434).
10.0*	-	American Family Corporation Retirement Plan for Senior Officers, as amended and restated October 1, 1989 – incorporated by reference from 1993 Form 10-K, Exhibit 10.2 (File No. 001-07434).
10.1*	-	Amendment to American Family Corporation Retirement Plan for Senior Officers, dated December 8, 2008 – incorporated by reference from 2008 Form 10-K, Exhibit 10.1 (File No. 001-07434).
10.2*		Second Amendment to the American Family Corporation Retirement Plan for Senior Officers, dated November 16, 2012 – incorporated by reference from Form 10-Q for September 30, 2016, Exhibit 10.2 (File No. 001-07434).
10.3*		Third Amendment to the American Family Corporation Retirement Plan for Senior Officers, dated October 18, 2016 – incorporated by reference from Form 10-Q for September 30, 2016, Exhibit 10.3 (File No. 001-07434).
10.4*	-	Aflac Incorporated Supplemental Executive Retirement Plan, as amended and restated January 1, 2009 – incorporated by reference from 2008 Form 10-K, Exhibit 10.5 (File No. 001-07434).
10.5*	-	First Amendment to the Aflac Incorporated Supplemental Executive Retirement Plan, as amended and restated January 1, 2009 – incorporated by reference from 2012 Form 10-K, Exhibit 10.3 (File No. 001-07434).
10.6*	-	Second Amendment to the Aflac Incorporated Supplemental Executive Retirement Plan, as amended and restated January 1, 2009 - incorporated by reference from 2014 Form 10-K, Exhibit 10.4 (File No. 001-07434).
10.7*	-	Aflac Incorporated Executive Deferred Compensation Plan, as amended and restated, effective September 1, 2015 – incorporated by reference from Form 10-Q for September 30, 2015, Exhibit 10.5 (File No. 001-07434).
10.8*	-	First Amendment to the Aflac Incorporated Executive Deferred Compensation Plan, as amended and restated, effective September 1, 2015 – incorporated by reference from Form 10-Q for September 30, 2016, Exhibit 10.8 (File No. 001-07434).
10.9*	-	Second Amendment to the Aflac Incorporated Executive Deferred Compensation Plan, as amended and restated, effective September 1, 2015.
10.10*	-	Aflac Incorporated 2013 Management Incentive Plan - incorporated by reference from the 2012 Proxy Statement, Appendix B (File No. 001-07434).
10.11*	-	Aflac Incorporated 2018 Management Incentive Plan - incorporated by reference from the 2017 Proxy Statement, Appendix B (File No. 001-07434).
10.12*	-	1999 Aflac Associate Stock Bonus Plan, amended and restated as of January 1, 2013 - incorporated by reference from Form 10-Q for March 31, 2013, Exhibit 10.10 (File No. 001-07434).
10.13*	-	Aflac Incorporated 1997 Stock Option Plan – incorporated by reference from the 1997 Shareholders’ Proxy Statement, Appendix B (File No. 001-07434).
10.14*	-	Form of Officer Stock Option Agreement (Non-Qualifying Stock Option) under the Aflac Incorporated 1997 Stock Option Plan – incorporated by reference from Form 8-K dated January 28, 2005, Exhibit 10.5 (File No. 001-07434).
10.15*	-	Form of Officer Stock Option Agreement (Incentive Stock Option) under the Aflac Incorporated 1997 Stock Option Plan – incorporated by reference from Form 8-K dated January 28, 2005, Exhibit 10.6 (File No. 001-07434).
10.16*	-	Notice of grant of stock options and stock option agreement to officers under the Aflac Incorporated 1997 Stock Option Plan – incorporated by reference from Form 8-K dated January 28, 2005, Exhibit 10.7 (File No. 001-07434).
10.17*	-	2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 – incorporated by reference from the 2012 Proxy Statement, Appendix A (File No. 001-07434).
10.18*	-	Form of Non-Employee Director Stock Option Agreement (NQSO) under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.13 (File No. 001-07434).
10.19*	-	Notice of grant of stock options to non-employee director under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.14 (File No. 001-07434).

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10.20*	-	Form of Non-Employee Director Restricted Stock Award Agreement under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.15 (File No. 001-07434).
10.21*	-	Notice of restricted stock award to non-employee director under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.16 (File No. 001-07434).
10.22*	-	U.S. Form of Employee Restricted Stock Award Agreement under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.17 (File No. 001-07434).
10.23*	-	Japan Form of Employee Restricted Stock Award Agreement under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.18 (File No. 001-07434).
10.24*	-	Notice of time based restricted stock award under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 – incorporated by reference from Form 10-Q for June 30, 2013, Exhibit 10.22 (File No. 001-07434).
10.25*	-	Notice of performance based restricted stock award under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.20 (File No. 001-07434).
10.26*	-	U.S. Form of Employee Stock Option Agreement (Non-Qualifying Stock Option) under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.21 (File No. 001-07434).
10.27*	-	Japan Form of Employee Stock Option Agreement (Non-Qualifying Stock Option) under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.22 (File No. 001-07434).
10.28*	-	U.S. Form of Employee Stock Option Agreement (Incentive Stock Option) under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.23 (File No. 001-07434).
10.29*	-	U.S. Notice of grant of stock options under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 – incorporated by reference from Form 10-Q for June 30, 2013, Exhibit 10.28 (File No. 001-07434).
10.30*	-	Japan Notice of grant of stock options under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 – incorporated by reference from Form 10-Q for June 30, 2013, Exhibit 10.29 (File No. 001-07434).
10.31*	-	Japan Form of Restricted Stock Unit Agreement under the 2004 Aflac Incorporated Long-Term Incentive Plan, as amended and restated March 14, 2012 - incorporated by reference from Form 10-Q for March 31, 2016, Exhibit 10.26 (File No. 001-07434).
10.32*	-	Aflac Incorporated Long-Term Incentive Plan, as amended and restated February 14, 2017 – incorporated by reference from the 2017 Proxy Statement, Appendix A (File No. 001-07434).
10.33*	-	Aflac Incorporated Retirement Plan for Directors Emeritus, as amended and restated, dated February 9, 2010 – incorporated by reference from 2009 Form 10-K, Exhibit 10.26 (File No. 001-07434).
10.34*	-	Amendment to Aflac Incorporated Retirement Plan for Directors Emeritus, as amended and restated, dated August 10, 2010 – incorporated by reference from Form 10-Q for September 30, 2010, Exhibit 10.27 (File No. 001-07434).
10.35*	-	Aflac Incorporated Employment Agreement with Daniel P. Amos, as amended and restated, dated August 20, 2015 - incorporated by reference from Form 10-Q for September 30, 2015, Exhibit 10.29 (File No. 001-07434).
10.36*	-	Aflac Incorporated Employment Agreement with Kriss Cloninger III, as amended and restated, dated August 20, 2015 - incorporated by reference from Form 10-Q for September 30, 2015, Exhibit 10.30 (File No. 001-07434).
10.37*	-	Aflac Employment Agreement with Paul S. Amos II, as amended and restated, dated August 19, 2015 - incorporated by reference from Form 10-Q for September 30, 2015, Exhibit 10.31 (File No. 001-07434).
10.38*	-	Aflac Employment Agreement with Eric M. Kirsch, as amended and restated, dated December 1, 2015 - incorporated by reference from Form 8-K dated December 1, 2015, Exhibit 10.1 (File No. 001-07434).
10.39*	-	Aflac Incorporated Employment Agreement with Frederick J. Crawford, effective June 30, 2015 – incorporated by reference from Form 8-K dated June 24, 2015, Exhibit 10.1 (File No. 001-07434).
11	-	Statement regarding the computation of per-share earnings for the Registrant.
12	-	Statement regarding the computation of ratio of earnings to fixed charges for the Registrant.
15	-	Letter from KPMG LLP regarding unaudited interim financial information.

92

31.1	-	Certification of CEO dated May 3, 2017, required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934.
31.2	-	Certification of CFO dated May 3, 2017, required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934.
32	-	Certification of CEO and CFO dated May 3, 2017, pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	-	XBRL Instance Document.(1)
101.SCH	-	XBRL Taxonomy Extension Schema.
101.CAL	-	XBRL Taxonomy Extension Calculation Linkbase.
101.DEF	-	XBRL Taxonomy Extension Definition Linkbase.
101.LAB	-	XBRL Taxonomy Extension Label Linkbase.
101.PRE	-	XBRL Taxonomy Extension Presentation Linkbase.

(1)

Includes the following materials contained in this Quarterly Report on Form 10-Q for the period ended March 31, 2017, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Statements of Earnings, (ii) Consolidated Statements of Comprehensive Income (Loss), (iii) Consolidated Balance Sheets, (iv) Consolidated Statements of Shareholders’ Equity, (v) Consolidated Statements of Cash Flows, (vi) Notes to the Consolidated Financial Statements

*

Management contract or compensatory plan or arrangement required to be filed as an exhibit pursuant to Item 6 of this report

93

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Aflac Incorporated
May 3, 2017	/s/ Frederick J. Crawford
	(Frederick J. Crawford)
	Executive Vice President, Chief Financial Officer
May 3, 2017	/s/ June Howard
	(June Howard)
	Senior Vice President, Financial Services; Chief Accounting Officer

94

EX-10.9

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 10.9

Exhibit A

SECOND AMENDMENT TO THE

AFLAC INCORPORATED EXECUTIVE DEFERRED COMPENSATION PLAN

(As amended and restated effective September 1, 2015)

THIS AMENDMENT to the Aflac Incorporated Executive Deferred Compensation Plan (the “Plan”) is effective as stated below.

WITNESSETH:

WHEREAS, Aflac Incorporated (the “Company”) has previously established the Plan for the benefit of its eligible employees and their beneficiaries; and

WHEREAS, pursuant to Section 10.1 of the Plan, the Administrative Committee of the Plan (the “Committee”) is authorized to amend the Plan; and

WHEREAS, the Committee wishes to amend the Plan to provide that the Committee may approve new participating companies under the Plan.

NOW, THEREFORE, the Plan is hereby amended as follows, effective as of the date of approval of this Amendment:

1. Section 1.36 is amended by deleting said section in its entirety and substituting in lieu thereof the following:

1.36Participating Company means, as of the Effective Date, each of (i) the Controlling Company, and (ii) each of its Affiliates that are designated by the Controlling Company on Exhibit A hereto as Participating Companies herein. In addition, any other Affiliate in the future may adopt the Plan with the consent of the Compensation Committee or the Administrative Committee, and such Affiliate’s name will be added to Exhibit A without the necessity of amending the Plan.

2. Except as specifically amended hereby, the Plan will remain in full form and effect.

EX-11

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 11

Aflac Incorporated and Subsidiaries

Computation of Earnings Per Share

Three Months Ended March 31,

	2017		2016
Numerator (In millions):
Basic and diluted: net earnings applicable to common stock	$	592	$	731
Denominator (In thousands):
Weighted-average outstanding shares used in the computation of earnings per share - basic	401,130		418,748
Dilutive effect of share-based awards	2,939		2,172
Weighted-average outstanding shares used in the computation of earnings per share - diluted	404,069		420,920
Earnings per share:
Basic	$	1.48	$	1.75
Diluted	1.47		1.74

EX-12

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 12

Aflac Incorporated and Subsidiaries

Ratio of Earnings to Fixed Charges

Three Months Ended March 31,

(In thousands)	2017		2016
Fixed charges:
Interest expense(1)	$	61,691	$	65,158
Interest on investment-type contracts	18,304		16,132
Rental expense deemed interest	122		135
Total fixed charges	$	80,117	$	81,425
Earnings before income tax(1)	$	898,471	$	1,117,154
Add back:
Total fixed charges	80,117		81,425
Total earnings before income tax and fixed charges	$	978,588	$	1,198,579
Ratio of earnings to fixed charges	12.2x		14.7x

⁽¹⁾Excludes interest expense on income tax liabilities

EX-15

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 15

May 3, 2017

Aflac Incorporated

Columbus, Georgia

Re: Registration Statement No. 333-197984 and 333-203839 on Form S-3; 333-135327, 333-161269, 333-202781, 333-158969, 333-27883, 333-200570, and 333-115105 on Form S-8

With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated May 3, 2017, related to our review of interim financial information.

Pursuant to Rule 436 under the Securities Act of 1933 (the Act), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG LLP

Atlanta, Georgia

EX-31.1

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 31.1

Certification of Chief Executive Officer

I, Daniel P. Amos, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aflac Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 3, 2017	/s/ Daniel P. Amos
		Daniel P. Amos
		Chairman and Chief Executive Officer

EX-31.2

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 31.2

Certification of Chief Financial Officer

I, Frederick J. Crawford, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aflac Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 3, 2017	/s/ Frederick J. Crawford
		Frederick J. Crawford
		Executive Vice President, Chief Financial Officer

EX-32

Aflac Incorporated 1st Quarter 2017 10-Q

EXHIBIT 32

Certification of CEO and CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Aflac Incorporated (the “Company”) for the quarterly period ended March 31, 2017, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Daniel P. Amos, as Chief Executive Officer of the Company, and Frederick J. Crawford, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Daniel P. Amos
Name:	Daniel P. Amos
Title:	Chief Executive Officer
Date:	May 3, 2017

/s/ Frederick J. Crawford
Name:	Frederick J. Crawford
Title:	Chief Financial Officer
Date:	May 3, 2017

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 25, 2017
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	AFL
Entity Registrant Name	AFLAC INC
Entity Central Index Key	0000004977
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		396,846,578

XML

Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Net premiums, principally supplemental health insurance	$ 4,638	$ 4,602
Net investment income	794	801
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(10)	(14)
Sales and redemptions	(7)	91
Derivative and other gains (losses)	(123)	(47)
Total realized investment gains (losses)	(140)	30
Other income (loss)	17	18
Total revenues	5,309	5,451
Benefits and expenses:
Benefits and claims, net	3,052	3,025
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	294	292
Insurance commissions	328	333
Insurance expenses	614	563
Interest expense	62	65
Other expenses	61	56
Total acquisition and operating expenses	1,359	1,309
Total benefits and expenses	4,411	4,334
Earnings before income taxes	898	1,117
Income taxes	306	386
Net earnings	$ 592	$ 731
Net earnings per share:
Basic (in dollars per share)	$ 1.48	$ 1.75
Diluted (in dollars per share)	$ 1.47	$ 1.74
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	401,130	418,748
Diluted (in shares)	404,069	420,920
Cash dividends per share	$ 0.43	$ 0.41

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings		$ 592	$ 731
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period		375	689
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period		(526)	2,689
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings		16	(77)
Unrealized gains (losses) on derivatives during period		2	3
Pension liability adjustment during period		(2)	(2)
Total other comprehensive income (loss) before income taxes		(135)	3,302
Income tax expense (benefit) related to items of other comprehensive income (loss)		(137)	991
Other comprehensive income (loss), net of income taxes	[1]	2	2,311
Total comprehensive income (loss)		$ 594	$ 3,042

[1] All amounts in the table above are net of tax.

XML

Consolidated Balance Sheets - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Securities held to maturity, at amortized cost:
Fixed maturities		$ 34,401	$ 33,350
Other Investments	[1]	1,701	1,450
Cash and cash equivalents		4,205	4,859
Total investments and cash		120,503	116,361
Receivables		618	669
Accrued investment income		723	754
Deferred policy acquisition costs		9,255	8,993
Property and equipment, at cost less accumulated depreciation		444	433
Other	[2]	2,107	2,609
Total assets		133,650	129,819
Insurance Loss Reserves [Abstract]
Future policy benefits		79,624	76,106
Unpaid policy claims		4,230	4,045
Unearned premiums		6,825	6,916
Other policyholders’ funds		6,945	6,659
Total policy liabilities		97,624	93,726
Income Taxes		5,626	5,387
Payables for return of cash collateral on loaned securities		1,482	526
Notes payable		5,250	5,360
Other	[3]	3,328	4,338
Total liabilities		113,310	109,337
Shareholders’ equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2017 and 2016; issued 671,683 shares in 2017 and 671,249 shares in 2016		67	67
Additional paid-in capital		2,008	1,976
Retained earnings		26,400	25,981
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(1,650)	(1,983)
Unrealized gain (losses) on investment securities		4,474	4,805
Unrealized gains (losses) on derivatives		(22)	(24)
Pension liability adjustment		(170)	(168)
Treasury stock, at average cost		(10,767)	(10,172)
Total shareholders’ equity		20,340	20,482
Total liabilities and shareholders’ equity		133,650	129,819
Investments Other Than Consolidated Variable Interest Entities
Securities available for sale, at fair value:
Fixed maturities		72,113	68,778
Perpetual securities		1,555	1,425
Equity securities		271	265
Securities held to maturity, at amortized cost:
Fixed maturities		34,401	33,350
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities		4,964	4,982
Perpetual securities		215	208
Equity securities		$ 1,078	$ 1,044

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

[2] Includes $146 in 2017 and $127 in 2016 of derivatives from consolidated variable interest entities

[3] Includes $125 in 2017 and $146 in 2016 of derivatives from consolidated variable interest entities

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Securities held to maturity, fixed maturities, fair value	$ 40,923	$ 40,021
Common stock, par value (in dollars per share)	$ 0.1	$ 0.1
Common stock, shares authorized (in shares)	1,900,000,000	1,900,000,000
Common stock, shares issued (in shares)	671,683,000	671,249,000
Asset derivatives	$ 580	$ 1,207
Liability derivatives	1,099	1,998
Investments Other Than Consolidated Variable Interest Entities
Securities available for sale, fixed maturities, amortized cost	66,118	62,195
Securities available for sale, perpetual securities, amortized cost	1,317	1,269
Securities available for sale, equity securities, cost	239	231
Securities held to maturity, fixed maturities, fair value	40,923	40,021
Variable Interest Entity, Consolidated
Securities available for sale, fixed maturities, amortized cost	4,143	4,168
Securities available for sale, perpetual securities, amortized cost	246	237
Securities available for sale, equity securities, cost	1,013	972
Asset derivatives	146	127
Liability derivatives	125	146
Commercial mortgage and middle market loans | Variable Interest Entity, Consolidated
Other investments held in unit trust, net of reserves, amortized cost	$ 926	$ 819

XML

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common stock:	Additional paid-in capital:	Retained earnings:	Accumulated other comprehensive income (loss):	Treasury stock:
Balance, beginning of period at Dec. 31, 2015		$ 67	$ 1,828	$ 24,007	$ 625	$ (8,819)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			10
Share-based compensation			21
Net earnings	$ 731			731
Dividends to shareholders				(173)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					612
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					1,698
Unrealized gains (losses) on derivatives during period, net of income taxes					2
Pension liability adjustment during period, net of income taxes					(1)
Purchases of treasury stock						(612)
Treasury stock reissued			7			18
Balance, end of period at Mar. 31, 2016	20,021	67	1,866	24,565	2,936	(9,413)
Balance, beginning of period at Dec. 31, 2016	20,482	67	1,976	25,981	2,630	(10,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			10
Share-based compensation			12
Net earnings	592			592
Dividends to shareholders				(173)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					333
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					(331)
Unrealized gains (losses) on derivatives during period, net of income taxes					2
Pension liability adjustment during period, net of income taxes					(2)
Purchases of treasury stock						(610)
Treasury stock reissued			10			15
Balance, end of period at Mar. 31, 2017	$ 20,340	$ 67	$ 2,008	$ 26,400	$ 2,632	$ (10,767)

XML

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net earnings	$ 592	$ 731
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	106	32
Increase in deferred policy acquisition costs	(41)	(37)
Increase in policy liabilities	666	919
Change in income tax liabilities	271	(367)
Realized investment (gains) losses	140	(30)
Other, net	23	83
Net cash provided (used) by operating activities	1,757	1,331
Securities available for sale:
Fixed maturities sold	1,385	266
Fixed maturities matured or called	204	408
Perpetual securities matured or called	0	35
Equity securities sold	155	0
Securities held to maturity:
Fixed maturities matured or called	228	277
Costs of investments acquired:
Available for sale fixed maturities acquired	(3,726)	(1,911)
Available for sale equity securities acquired	(157)	(364)
Other investments, net	(203)	(123)
Settlement of derivatives, net	(44)	273
Cash received (pledged or returned) as collateral, net	654	(189)
Other, net	(23)	(159)
Net cash provided (used) by investing activities	(1,527)	(1,487)
Cash flows from financing activities:
Purchases of treasury stock	(610)	(612)
Proceeds from borrowings	524	0
Principal payments under debt obligations	(654)	0
Dividends paid to shareholders	(166)	(167)
Change in investment-type contracts, net	18	45
Treasury stock reissued	11	7
Other, net	1	(39)
Net cash provided (used) by financing activities	(876)	(766)
Effect of exchange rate changes on cash and cash equivalents	(8)	21
Net change in cash and cash equivalents	(654)	(901)
Cash and cash equivalents, beginning of period	4,859	4,350
Cash and cash equivalents, end of period	4,205	3,449
Supplemental disclosures of cash flow information:
Income taxes paid	58	779
Interest paid	47	54
Noncash interest	15	12
Impairment losses included in realized investment losses	10	14
Capital lease obligations incurred	2	1
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	6	8
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	7	6
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 1	$ 4

XML

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of Business

Aflac Incorporated (the Parent Company) and its subsidiaries (collectively, the Company) primarily sell supplemental health and life insurance in the United States and Japan. The Company's insurance business is marketed and administered through American Family Life Assurance Company of Columbus (Aflac), which operates in the United States (Aflac U.S.) and as a branch in Japan (Aflac Japan). American Family Life Assurance Company of New York (Aflac New York) is a wholly owned subsidiary of Aflac. Most of Aflac's policies are individually underwritten and marketed through independent agents. Additionally, Aflac U.S. markets and administers group products through Continental American Insurance Company (CAIC), branded as Aflac Group Insurance. Our insurance operations in the United States and our branch in Japan service the two markets for our insurance business. Aflac Japan's revenues, including realized gains and losses on its investment portfolio, accounted for 69% and 74% of the Company's total revenues in the three-month periods ended March 31, 2017, and 2016, respectively. The percentage of the Company's total assets attributable to Aflac Japan was 84% at March 31, 2017, compared with 83% at December 31, 2016.

Basis of Presentation

We prepare our financial statements in accordance with U.S. generally accepted accounting principles (GAAP). These principles are established primarily by the Financial Accounting Standards Board (FASB). In these Notes to the Consolidated Financial Statements, references to U.S. GAAP issued by the FASB are derived from the FASB Accounting Standards Codification^TM (ASC). The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates when recording transactions resulting from business operations based on currently available information. The most significant items on our balance sheet that involve a greater degree of accounting estimates and actuarial determinations subject to changes in the future are the valuation of investments and derivatives, deferred policy acquisition costs, liabilities for future policy benefits and unpaid policy claims, and income taxes. These accounting estimates and actuarial determinations are sensitive to market conditions, investment yields, mortality, morbidity, commission and other acquisition expenses, and terminations by policyholders. As additional information becomes available, or actual amounts are determinable, the recorded estimates will be revised and reflected in operating results. Although some variability is inherent in these estimates, we believe the amounts provided are adequate.

The unaudited consolidated financial statements include the accounts of the Parent Company, its subsidiaries and those entities required to be consolidated under applicable accounting standards. All material intercompany accounts and transactions have been eliminated.

In the opinion of management, the accompanying unaudited consolidated financial statements of the Company contain all adjustments, consisting of normal recurring accruals, which are necessary to fairly present the consolidated balance sheets as of March 31, 2017 and December 31, 2016, the consolidated statements of earnings and comprehensive income (loss), shareholders' equity and cash flows for the three-month periods ended March 31, 2017 and 2016. Results of operations for interim periods are not necessarily indicative of results for the entire year. As a result, these financial statements should be read in conjunction with the financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2016 (2016 Annual Report).

Reclassifications: Certain reclassifications have been made to prior-year amounts to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity.

Prior year foreign currency transaction gains and losses have been reclassified from Other income (loss) to Realized investment gains (losses) - Derivative and other gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity. This change in classification was made to reflect that the major source of our foreign currency transaction gains and losses is directly or indirectly a result of our investment activity.

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Consolidation - Interests Held through Related Parties That Are under Common Control: In October 2016, the FASB issued amendments which clarify the consolidation guidance on how a reporting entity that is the single decision maker of a variable interest entity (VIE) should treat indirect interests in the entity held through related parties that are under common control with the reporting entity when determining whether it is the primary beneficiary of that VIE. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting: In March 2016, the FASB issued amendments which simplify several aspects for share-based payment award transactions, including income tax consequences, classification of awards as either liability or equities, and classification on the statement of cash flows. We adopted this guidance as of January 1, 2017.

The amendment requires prospective recognition of excess tax benefits and deficiencies in the income statement, rather than in paid-in capital. As a result of applying this requirement, we believe that recognition of excess tax benefits will increase volatility in our statement of operations but the adoption of this guidance did not have a significant impact on our statement of financial position, operations, or disclosures. 

The amendment also requires all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) to be recognized as income tax expense or benefit in the income statement. The guidance requires modified retrospective transition for settlements on all outstanding awards (both historical and future) that did not give rise to an excess benefit to be recorded through retained earnings on a cumulative-effect basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Additionally, the amendment requires that the minimum statutory tax withholding for all outstanding liability awards be reclassified at the date of adoption to equity (assuming equity classification results from the guidance change), and as a cumulative-effect adjustment to equity be recorded on a modified retrospective basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

The guidance requires certain reclassifications of balances on the statement of cash flows to or from operating and financing activities. The reclassification guidance did not have a significant impact on our statement of cash flows.

The amendment allows an entity to elect whether to use estimates of forfeitures, or to account for forfeitures as they occur, using modified retrospective application. We have made an entity-wide accounting policy election to estimate the number of awards that are expected to vest (consistent with our prior policy). The election and adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Investments - Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting: In March 2016, the FASB issued amendments whicheliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. Per the amendments, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments also require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Contingent Put and Call Options in Debt Instruments: In March 2016, the FASB issued amendments which clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is related to interest rates or credit risks. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships: In March 2016, the FASB issued amendments which clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria remain intact. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Financial Services - Insurance - Disclosures about Short-Duration Contracts:In May 2015, the FASB issued updated guidance requiring enhanced disclosures by all insurance entities that issue short-duration contracts. The amendments require insurance entities to disclose for annual reporting periods information about the liability for unpaid claims and claim adjustment expenses. The amendments also require insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate the liability for unpaid claims and claim adjustment expenses. In addition, the amendments require insurance entities to disclose for annual and interim reporting periods a roll-forward of the liability for unpaid claims and claim adjustment expenses. For health insurance claims, the amendments require the disclosure of the total of incurred-but-not-reported liabilities and expected development on reported claims included in the liability for unpaid claims and claim adjustment expenses. We adopted this guidance as of December 31, 2016, and have no insurance contracts classified as short-duration. The adoption of this guidance did not have a significant impact on our disclosures.

Presentation of Financial Statements - Going Concern - Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern:In August 2014, the FASB issued this amendment that provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. The new guidance requires a formal assessment of going concern by management based on criteria prescribed in the new guidance. We adopted this guidance as of December 31, 2016. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures, and no substantial doubt currently exists about the Company’s ability to continue as a going concern.

Accounting Pronouncements Pending Adoption

Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued amendments to shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount. The amendments are effective for public business entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, or disclosures.

Compensation-Retirement Benefit: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost: In March 2017, the FASB issued amendments requiring that an employer report the service cost component of net periodic pension cost and net periodic postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic pension cost and net periodic postretirement benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments in this update also allow only the service cost component to be eligible for capitalization when applicable. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets: In February 2017, the FASB issued amendments clarifying that the accounting guidance for derecognition of nonfinancial assets does not apply to the derecognition of businesses, nonprofit activities or financial assets that meet the definition of "in substance nonfinancial assets." The new guidance defines an "in substance nonfinancial asset" to be an asset or group of assets for which substantially all of the fair value consists of nonfinancial assets and the group or subsidiary is not a business. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Earlier adoption is permitted for fiscal years beginning after December 15, 2016, including interim periods therein. An entity is required to apply the amendments at the same time that it applies the FASB amendments for Revenue from Contracts with Customers. We are evaluating the impact of adoption of this guidance on our financial position, results of operations, disclosures, and statements of cash flows.

Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment: In January 2017, the FASB issued amendments simplifying the subsequent measurement of goodwill. An entity, under this update, is no longer required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, the entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The amendments are effective for public business entities that are U.S. SEC filers for annual or any interim goodwill impairment tests in fiscal years beginning after Dec. 15, 2019. Early adoption is permitted for any goodwill impairment tests performed on testing dates after January 1, 2017. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Business Combinations - Clarifying the Definition of a Business: In January 2017, the FASB issued amendments clarifying when a set of assets and activities is a business. The amendments provide a screen to determine when a set of assets and activities is not a business. The amendments are effective for public business entities beginning after December 15, 2017, including interim periods within those periods. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Statement of Cash Flows - Restricted Cash: In November 2016, the FASB issued amendments requiring that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, disclosures or statement of cash flows.

Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory: In October 2016, the FASB issued amendments that require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments are effective for public business entities for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted. We are evaluating the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments: In August 2016, the FASB issued amendments that provide guidance on eight specific statement of cash flows classification issues. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted for any interim or annual period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

Financial Instruments - Credit Losses - Measurement of Credit Losses on Financial Instruments: In June 2016, the FASB issued amendments that require a financial asset (or a group of financial assets) measured on an amortized cost basis to be presented net of an allowance for credit losses in order to reflect the amount expected to be collected on the financial asset(s). The measurement of expected credit losses is amended by replacing the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform about a credit loss. Credit losses on available-for-sale debt securities will continue to be measured in a manner similar to current U.S. GAAP. However, the amendments require that credit losses be presented as an allowance rather than as a writedown. Other amendments include changes to the balance sheet presentation and interest income recognition of purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. The amendments are effective for public companies for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Companies may early adopt this guidance as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, loans and loan receivables and reinsurance recoverables (See Notes 3 and 7 for current balances of instruments in scope). We are continuing to evaluate the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Leases: In February 2016, the FASB issued updated guidance for accounting for leases. Per the amendments, lessees will be required to recognize all leases on the balance sheet, with the exception of short-term leases. A lease liability will be recorded for the obligation of a lessee to make lease payments arising from a lease. A right-of-use asset, will be recorded which represents the lessee’s right to use, or to control the use of, a specified asset for a lease term. Under the new guidance, lessor accounting is largely unchanged. The amendments are effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We have identified certain operating leases in scope of this guidance to include office space and equipment leases (See Note 15 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for current balances of leases in scope). The leases within scope of this guidance will increase our right-of-use assets recorded on our financial position, however we estimate leases within scope of the guidance to represent less than 1% of our total assets as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

Financial Instruments - Overall - Recognition and Measurement of Financial Assets and Financial Liabilities: In January 2016, the FASB issued guidance to address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The main provisions require that equity investments be measured at fair value with changes recognized in net income; that changes in instrument-specific credit risk for financial liabilities that are measured under the fair value option be recognized in other comprehensive income; and that entities would make the assessment of the ability to realize a deferred tax asset (DTA) related to an available-for-sale (AFS) debt security in combination with the entity's other DTAs. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is not permitted, with the exception of the own credit provision if an entity has elected to measure a liability at fair value. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, perpetual securities and equity securities (See Note 3 for current balances of instruments in scope). We estimate that the impact of this guidance will increase volatility in our statement of operations and we are continuing to evaluate the impact of this guidance on our statement of financial position, operations and disclosures.

Revenue from Contracts with Customers: In May 2014, the FASB issued updated guidance that affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g., insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB deferred the effective date for this standard to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods. We have identified revenue in scope of this guidance to include certain revenues associated with affiliated entities in support of our operations. We estimate the revenue within scope of the guidance to represent less than 1% of our total revenues as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

Recent accounting guidance not discussed above is not applicable, did not have, or is not expected to have a material impact to our business. 

For additional information on new accounting pronouncements and recent accounting guidance and their impact, if any, on our financial position or results of operations, see Note 1 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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BUSINESS SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

BUSINESS SEGMENT INFORMATION

BUSINESS SEGMENT INFORMATION

The Company consists of two reportable insurance business segments: Aflac Japan and Aflac U.S., both of which sell supplemental health and life insurance. Operating business segments that are not individually reportable and business activities, including reinsurance retrocession activities, not included in Aflac Japan or Aflac U.S. are included in the "Other business segments" category.

We do not allocate corporate overhead expenses to business segments. Consistent with U.S. GAAP accounting guidance for segment reporting, we evaluate and manage our business segments using a financial performance measure called pretax operating earnings. Our definition of operating earnings includes interest cash flows associated with notes payable and hedge costs related to foreign currency denominated investments, but excludes certain items that cannot be predicted or that are outside of management's control, such as realized investment gains and losses from securities transactions, impairments, and certain derivative and foreign currency activities; nonrecurring items; and other non-operating income (loss) from net earnings. Nonrecurring and other non-operating items consist of infrequent events and activity not associated with the normal course of the Company’s insurance operations and do not reflect Aflac’s underlying business performance. We exclude income taxes related to operations to arrive at pretax operating earnings. Information regarding operations by segment follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Revenues:
Aflac Japan:
Net earned premiums	$	3,194		$	3,179
Net investment income, less amortized hedge costs (1)	557			590
Other income	10			8
Total Aflac Japan	3,761			3,777
Aflac U.S.:
Net earned premiums	1,390			1,367
Net investment income	178			174
Other income	1			3
Total Aflac U.S.	1,569			1,544
Other business segments	67			65
Total business segment revenues	5,397			5,386
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Corporate	87			67
Intercompany eliminations and other	(66		)	(42		)
Total revenues	$	5,309		$	5,451

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total revenues.

	Three Months Ended March 31,
(In millions)	2017			2016
Pretax earnings:
Aflac Japan (1)	$	769		$	806
Aflac U.S.	310			332
Other business segments	0			3
Total business segment pretax operating earnings	1,079			1,141
Interest expense, noninsurance operations	(29		)	(29		)
Corporate and eliminations	(23		)	(35		)
Pretax operating earnings	1,027			1,077
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Other non-operating income (loss) (3)	(20		)	0
Total earnings before income taxes	$	898		$	1,117
Income taxes applicable to pretax operating earnings	$	351		$	372
Effect of foreign currency translation on after-tax operating earnings	5			13

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from pretax operating earnings when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total earnings before income taxes.

Assets were as follows:

(In millions)	March 31, 2017				December 31, 2016
Assets:
Aflac Japan		$	112,023			$	107,858
Aflac U.S.		19,817				19,453
Other business segments		338				270
Total business segment assets		132,178				127,581
Corporate		26,024				26,476
Intercompany eliminations		(24,552		)		(24,238		)
Total assets		$	133,650			$	129,819

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INVESTMENTS

3 Months Ended

Mar. 31, 2017

Investments [Abstract]

INVESTMENTS

INVESTMENTS

Investment Holdings

The amortized cost for our investments in debt and perpetual securities, the cost for equity securities and the fair values of these investments are shown in the following tables.

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	26,311		$	3,203		$	366		$	29,148
Municipalities		281			26			12			295
Mortgage- and asset-backed securities		272			32			0			304
Public utilities		1,637			324			6			1,955
Sovereign and supranational		846			133			6			973
Banks/financial institutions		3,039			414			83			3,370
Other corporate		3,429			596			16			4,009
Total yen-denominated		35,815			4,728			489			40,054
U.S. dollar-denominated:
U.S. government and agencies		161			11			0			172
Municipalities		901			133			7			1,027
Mortgage- and asset-backed securities		184			16			0			200
Public utilities		5,296			669			77			5,888
Sovereign and supranational		326			87			0			413
Banks/financial institutions		2,680			513			18			3,175
Other corporate		24,898			1,972			722			26,148
Total U.S. dollar-denominated		34,446			3,401			824			37,023
Total fixed maturities		70,261			8,129			1,313			77,077
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,315			208			50			1,473
Other corporate		196			23			0			219
U.S. dollar-denominated:
Banks/financial institutions		52			26			0			78
Total perpetual securities		1,563			257			50			1,770
Equity securities:
Yen-denominated		668			63			10			721
U.S. dollar-denominated		584			55			11			628
Total equity securities		1,252			118			21			1,349
Total securities available for sale		$	73,076		$	8,504		$	1,384		$	80,196

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	21,493		$	5,114		$	0		$	26,607
Municipalities		363			104			0			467
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,324			376			7			3,693
Sovereign and supranational		2,702			307			0			3,009
Banks/financial institutions		3,650			204			24			3,830
Other corporate		2,839			446			0			3,285
Total yen-denominated		34,401			6,553			31			40,923
Total securities held to maturity		$	34,401		$	6,553		$	31		$	40,923

	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	22,857		$	3,359		$	160		$	26,056
Municipalities		246			29			8			267
Mortgage- and asset-backed securities		1,096			33			8			1,121
Public utilities		1,533			318			3			1,848
Sovereign and supranational		862			186			5			1,043
Banks/financial institutions		2,673			403			74			3,002
Other corporate		3,192			623			3			3,812
Total yen-denominated		32,459			4,951			261			37,149
U.S dollar-denominated:
U.S. government and agencies		148			10			0			158
Municipalities		894			142			8			1,028
Mortgage- and asset-backed securities		196			20			0			216
Public utilities		5,205			690			60			5,835
Sovereign and supranational		335			91			0			426
Banks/financial institutions		2,570			507			16			3,061
Other corporate		24,556			2,021			690			25,887
Total U.S. dollar-denominated		33,904			3,481			774			36,611
Total fixed maturities		66,363			8,432			1,035			73,760
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,266			128			49			1,345
Other corporate		189			24			0			213
U.S. dollar-denominated:
Banks/financial institutions		51			24			0			75
Total perpetual securities		1,506			176			49			1,633
Equity securities:
Yen-denominated		624			83			2			705
U.S. dollar-denominated		579			31			6			604
Total equity securities		1,203			114			8			1,309
Total securities available for sale		$	69,072		$	8,722		$	1,092		$	76,702

	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	20,702		$	5,338		$	0		$	26,040
Municipalities		350			107			0			457
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,201			358			23			3,536
Sovereign and supranational		2,602			283			8			2,877
Banks/financial institutions		3,731			195			26			3,900
Other corporate		2,734			452			7			3,179
Total yen-denominated		33,350			6,735			64			40,021
Total securities held to maturity		$	33,350		$	6,735		$	64		$	40,021

The methods of determining the fair values of our investments in fixed-maturity securities, perpetual securities and equity securities are described in Note 5.

During the first three months of 2017 and 2016, respectively, we did not reclassify any investments from the held-to-maturity category to the available-for-sale category.

Contractual and Economic Maturities

The contractual maturities of our investments in fixed maturities at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Available for sale:
Due in one year or less		$	145		$	161		$	74		$	77
Due after one year through five years		3,561			3,788			664			716
Due after five years through 10 years		9,846			10,093			3,128			3,324
Due after 10 years		43,392			48,447			8,462			9,421
Mortgage- and asset-backed securities		316			361			43			47
Total fixed maturities available for sale		$	57,260		$	62,850		$	12,371		$	13,585
Held to maturity:
Due after one year through five years		$	2,086		$	2,193		$	0		$	0
Due after five years through 10 years		1,645			1,813			0			0
Due after 10 years		30,640			36,884			0			0
Mortgage- and asset-backed securities		30			33			0			0
Total fixed maturities held to maturity		$	34,401		$	40,923		$	0		$	0

At March 31, 2017, the Parent Company and other business segments had portfolios of available-for-sale fixed-maturity securities totaling $630 million at amortized cost and $642 million at fair value, which are not included in the table above.

Expected maturities may differ from contractual maturities because some issuers have the right to call or prepay obligations with or without call or prepayment penalties.

The majority of our perpetual securities are subordinated to other debt obligations of the issuer, but rank higher than the issuer's equity securities. Perpetual securities have characteristics of both debt and equity investments, along with unique features that create economic maturity dates for the securities. Although perpetual securities have no contractual maturity date, they have stated interest coupons that were fixed at their issuance and subsequently change to a floating short-term interest rate after some period of time. The instruments are generally callable by the issuer at the time of changing from a fixed coupon rate to a new variable rate of interest, which is determined by the combination of some market index plus a fixed amount of basis points. The net effect is to create an expected maturity date for the instrument. The economic maturities of our investments in perpetual securities, which were all reported as available for sale at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Due in one year or less		$	90		$	87		$	0		$	0
Due after one year through five years		196			219			0			0
Due after 10 years		1,238			1,407			39			57
Total perpetual securities available for sale		$	1,524		$	1,713		$	39		$	57

Investment Concentrations

Our process for investing in credit-related investments begins with an independent approach to underwriting each issuer's fundamental credit quality. We evaluate independently those factors which we believe could influence an issuer's ability to make payments under the contractual terms of our instruments. This includes a thorough analysis of a variety of items including the issuer's country of domicile (including political, legal, and financial considerations); the industry in which the issuer competes (with an analysis of industry structure, end-market dynamics, and regulation); company specific issues (such as management, assets, earnings, cash generation, and capital needs); and contractual provisions of the instrument (such as financial covenants and position in the capital structure). We further evaluate the investment considering broad business and portfolio management objectives, including asset/liability needs, portfolio diversification, and expected income.

Investment exposures that individually exceeded 10% of shareholders' equity were as follows:

	March 31, 2017			December 31, 2016
(In millions)	Credit Rating	Amortized Cost	Fair Value	Credit Rating	Amortized Cost	Fair Value
Japan National Government(1)	A	$47,131	$54,971	A	$42,931	$51,345

⁽¹⁾Japan Government Bonds (JGBs) or JGB-backed securities

Realized Investment Gains and Losses

Information regarding pretax realized gains and losses from investments is as follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Realized investment gains (losses):
Fixed maturities:
Available for sale:
Gross gains from sales	$	12		$	2
Gross losses from sales(1)	(15		)	(4		)
Net gains (losses) from redemptions(1)	(29		)	83
Other-than-temporary impairment losses(1)	(4		)	(12		)
Total fixed maturities	(36		)	69
Perpetual securities:
Available for sale:
Net gains (losses) from redemptions	0			10			(1)
Other-than-temporary impairment losses	0			(2		)	(1)
Total perpetual securities	0			8
Equity securities:
Net gains (losses) from redemptions	25			0
Other-than-temporary impairment losses	(6		)	0
Total equity securities	19			0
Derivatives and other:
Derivative gains (losses)	(52		)	(4		)
Foreign currency gains (losses)	(71		)	(43		)
Total derivatives and other	(123		)	(47		)
Total realized investment gains (losses)	$	(140	)	$	30

⁽¹⁾ Primarily driven by foreign exchange

Unrealized Investment Gains and Losses

Effect on Shareholders’ Equity

The net effect on shareholders’ equity of unrealized gains and losses from investment securities was as follows:

(In millions)	March 31, 2017				December 31, 2016
Unrealized gains (losses) on securities available for sale		$	7,120			$	7,630
Deferred income taxes		(2,646		)		(2,825		)
Shareholders’ equity, unrealized gains (losses) on investment securities		$	4,474			$	4,805

Gross Unrealized Loss Aging

The following tables show the fair values and gross unrealized losses of our available-for-sale and held-to-maturity investments that were in an unrealized loss position, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position.

	March 31, 2017
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	5,940		$	366		$	5,940		$	366		$	0		$	0
Municipalities:
U.S. dollar-denominated		45			7			0			0			45			7
Yen-denominated		132			12			132			12			0			0
Public utilities:
U.S. dollar-denominated		1,642			77			1,124			37			518			40
Yen-denominated		325			13			127			6			198			7
Sovereign and supranational:
Yen-denominated		39			6			39			6			0			0
Banks/financial institutions:
U.S. dollar-denominated		390			18			309			6			81			12
Yen-denominated		1,531			107			646			34			885			73
Other corporate:
U.S. dollar-denominated		10,690			722			7,046			272			3,644			450
Yen-denominated		415			16			415			16			0			0
Total fixed maturities		21,149			1,344			15,778			755			5,371			589
Perpetual securities:
Yen-denominated		409			50			0			0			409			50
Total perpetual securities		409			50			0			0			409			50
Equity securities:
U.S. dollar-denominated		131			11			117			8			14			3
Yen-denominated		208			10			172			5			36			5
Total equity securities		339			21			289			13			50			8
Total		$	21,897		$	1,415		$	16,067		$	768		$	5,830		$	647

	December 31, 2016
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	3,958		$	160		$	3,958		$	160		$	0		$	0
Municipalities:
U.S. dollar-denominated		44			8			0			0			44			8
Yen-denominated		105			8			105			8			0			0
Mortgage- and asset- backed securities:
Yen-denominated		713			8			713			8			0			0
Public utilities:
U.S. dollar-denominated		1,265			60			790			32			475			28
Yen-denominated		635			26			347			14			288			12
Sovereign and supranational:
Yen-denominated		244			13			38			5			206			8
Banks/financial institutions:
U.S. dollar-denominated		268			16			238			10			30			6
Yen-denominated		1,521			100			636			19			885			81
Other corporate:
U.S. dollar-denominated		10,462			690			7,252			346			3,210			344
Yen-denominated		321			10			321			10			0			0
Total fixed maturities		19,536			1,099			14,398			612			5,138			487
Perpetual securities:
Yen-denominated		479			49			85			1			394			48
Total perpetual securities		479			49			85			1			394			48
Equity securities:
U.S. dollar-denominated		211			6			211			6			0			0
Yen-denominated		49			2			49			2			0			0
Total equity securities		260			8			260			8			0			0
Total		$	20,275		$	1,156		$	14,743		$	621		$	5,532		$	535

Analysis of Securities in Unrealized Loss Positions

The unrealized losses on our fixed maturity or perpetual securities investments have been primarily related to general market changes in interest rates, foreign exchange rates, and/or the levels of credit spreads rather than specific concerns with the issuer's ability to pay interest and repay principal. The unrealized losses on our investments in equity securities are primarily related to foreign exchange rates, general market conditions which reflect prospects for the economy as a whole, or specific information pertaining to an industry or an individual company.

For any significant declines in fair value of our fixed income or perpetual securities, we perform a more focused review of the related issuers' credit profile. For corporate issuers, we evaluate their assets, business profile including industry dynamics and competitive positioning, financial statements and other available financial data. For non-corporate issuers, we analyze all sources of credit support, including issuer-specific factors. We utilize information available in the public domain and, for certain private placement issuers, from consultations with the issuers directly. We also consider ratings from Nationally Recognized Statistical Rating Organizations (NRSROs), as well as the specific characteristics of the security we own including seniority in the issuer's capital structure, covenant predictions, or other relevant features. From these reviews, we evaluate the issuers' continued ability to service our investment through payment of interest and principal.

For any significant declines in fair value of our equity securities, we review the severity of the security’s decline in fair value coupled with the length of time the fair value of the security has been below cost. We also perform a more focused review of the financial condition and near-term prospects of the issuer as well as general market conditions reflecting the prospects for the economy as a whole, and determine whether we have the intent to hold the securities until they recover in value.

Assuming no credit-related factors develop, unrealized gains and losses on fixed maturities and perpetual securities are expected to diminish as investments near maturity. Based on our credit analysis, we believe that the issuers of our fixed maturity and perpetual security investments in the sectors shown in the table above have the ability to service their obligations to us.

Other Investments

The table below reflects the composition of the carrying value for other investments as of the periods presented.

(In millions)	March 31, 2017			December 31, 2016
Other investments:
Commercial mortgage loans		$	870		$	855
Middle market loans		439			319
Short-term investments		141			89
Policy loans		197			184
Other		54			3
Total other investments		$	1,701		$	1,450

Loans and Loan Receivables

We classify our commercial mortgage loans (CMLs) and middle market loans (MMLs) as held-for-investment and include them in the other investments line on the consolidated balance sheets. We carry them on the balance sheet at amortized cost less an estimated allowance for loan losses. Our loan allowance for losses is established using both specific and general allowances. The specific allowance is used on an individual loan basis for those impaired loans where we expect to incur a loss. The general allowance is used for loans grouped by similar risk characteristics where a loan-specific or market-specific risk has not been identified, but for which we anticipate to incur a loss. As of March 31, 2017 and December 31, 2016, our allowance for loan losses was $4 million and $3 million, respectively. As of March 31, 2017 and December 31, 2016, we had no loans that were past due in regards to principal and/or interest payments. Additionally, we held no loans that were on nonaccrual status or considered impaired as of March 31, 2017 and December 31, 2016. We had no troubled debt restructurings during the three months ended March 31, 2017 and 2016.

Middle Market Loans

The carrying value for middle market loans included an unfunded amount of $135 million and $91 million, as of March 31, 2017, and December 31, 2016, respectively, that is reflected in other liabilities on the consolidated balance sheets.

As of March 31, 2017, we had commitments of $658 million to fund potential future loan originations related to this investment program, inclusive of loans held in unit trust structures. These commitments are contingent upon the availability of middle market loans that meet our underwriting criteria.

Commercial Mortgage Loans

As of March 31, 2017, we had $18 million in outstanding commitments to fund commercial mortgage loans, inclusive of loans held in unit trust structures. These commitments are contingent on the final underwriting and due diligence to be performed.

Variable Interest Entities (VIEs)

As a condition of our involvement or investment in a VIE, we enter into certain protective rights and covenants that preclude changes in the structure of the VIE that would alter the creditworthiness of our investment or our beneficial interest in the VIE.

For those VIEs other than certain unit trust structures, our involvement is passive in nature. We are not, nor have we been, required to purchase any securities issued in the future by these VIEs.

Our ownership interest in VIEs is limited to holding the obligations issued by them. We have no direct or contingent obligations to fund the limited activities of these VIEs, nor do we have any direct or indirect financial guarantees related to the limited activities of these VIEs. We have not provided any assistance or any other type of financing support to any of the VIEs we invest in, nor do we have any intention to do so in the future. For those VIEs in which we hold debt obligations, the weighted-average lives of our notes are very similar to the underlying collateral held by these VIEs where applicable.

We also utilize unit trust structures in our Aflac Japan segment to invest in various asset classes. As the sole investor of these VIEs, we are required to consolidate these entities under U.S. GAAP.

Our risk of loss related to our interests in any of our VIEs is limited to the carrying value of the related investments held in the VIE.

VIEs - Consolidated

The following table presents the cost or amortized cost, fair value and balance sheet caption in which the assets and liabilities of consolidated VIEs are reported.

Investments in Consolidated Variable Interest Entities

	March 31, 2017						December 31, 2016
(In millions)	Cost or Amortized Cost			Fair Value			Cost or Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,143		$	4,964		$	4,168		$	4,982
Perpetual securities, available for sale		246			215			237			208
Equity securities		1,013			1,078			972			1,044
Other investments (1)		926			906			819			789
Other assets (2)		146			146			127			127
Total assets of consolidated VIEs		$	6,474		$	7,309		$	6,323		$	7,150
Liabilities:
Other liabilities (2)		$	125		$	125		$	146		$	146
Total liabilities of consolidated VIEs		$	125		$	125		$	146		$	146

⁽¹⁾ Consists of CMLs and MMLs

⁽²⁾ Consist entirely of derivatives

We are substantively the only investor in the consolidated VIEs listed in the table above. As the sole investor in these VIEs, we have the power to direct the activities of a variable interest entity that most significantly impact the entity's economic performance and are therefore considered to be the primary beneficiary of the VIEs that we consolidate. We also participate in substantially all of the variability created by these VIEs. The activities of these VIEs are limited to holding invested assets and foreign currency, and/or credit default swaps (CDS), as appropriate, and utilizing the cash flows from these securities to service our investment. Neither we nor any of our creditors are able to obtain the underlying collateral of the VIEs unless there is an event of default or other specified event. For those VIEs that contain a swap, we are not a direct counterparty to the swap contracts and have no control over them. Our loss exposure to these VIEs is limited to our original investment. Our consolidated VIEs do not rely on outside or ongoing sources of funding to support their activities beyond the underlying collateral and swap contracts, if applicable. With the exception of our investment in unit trust structures, the underlying collateral assets and funding of our consolidated VIEs are generally static in nature and the underlying collateral and the reference corporate entities covered by any CDS contracts were all investment grade at the time of issuance.

Investments in Unit Trust Structures

We invest through unit trust structures in yen-denominated public equity securities, U.S. dollar-denominated public equity securities, bank loans, commercial mortgage loans, infrastructure debt, and middle market loans in which we are the only investor, requiring us to consolidate these trusts under U.S. GAAP. The yen-denominated and U.S. dollar-denominated equity securities, bank loans and certain infrastructure debt are classified as available-for-sale in the financial statements. The commercial mortgage loans, middle market loans and certain infrastructure debt that meets the criteria to be classified as a loan are classified as loans held for investment and reflected in other investments on the consolidated balance sheets at amortized cost.

VIEs-Not Consolidated

The table below reflects the amortized cost, fair value and balance sheet caption in which our investment in VIEs not consolidated are reported.

Investments in Variable Interest Entities Not Consolidated

	March 31, 2017						December 31, 2016
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,823		$	5,354		$	4,729		$	5,261
Perpetual securities, available for sale		178			230			172			200
Fixed maturities, held to maturity		2,660			3,039			2,563			2,948
Other investments		52			52			1			1
Total investments in VIEs not consolidated		$	7,713		$	8,675		$	7,465		$	8,410

The VIEs that we are not required to consolidate are investments that are in the form of debt obligations from the VIEs that are irrevocably and unconditionally guaranteed by their corporate parents or sponsors. These VIEs are the primary financing vehicles used by their corporate sponsors to raise financing in the capital markets. The variable interests created by these VIEs are principally or solely a result of the debt instruments issued by them. We do not have the power to direct the activities that most significantly impact the entity's economic performance, nor do we have the obligation to absorb losses of the entity or the right to receive benefits from the entity. As such, we are not the primary beneficiary of these VIEs and are therefore not required to consolidate them. These VIE investments comprise securities from 149 separate issuers with an average credit rating of BBB as of March 31, 2017, compared with 145 separate issuers with an average credit rating of BBB as of December 31, 2016.

Securities Lending and Pledged Securities

We lend fixed-maturity securities to financial institutions in short-term security-lending transactions. These short-term security-lending arrangements increase investment income with minimal risk. Our security lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be 102% or more of the fair value of the loaned securities. These securities continue to be carried as investment assets on our balance sheet during the terms of the loans and are not reported as sales. We receive cash or other securities as collateral for such loans. For loans involving unrestricted cash or securities as collateral, the collateral is reported as an asset with a corresponding liability for the return of the collateral.

Details of our securities lending activities were as follows:

Securities Lending Transactions Accounted for as Secured Borrowings
March 31, 2017
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Japan government and agencies	$	0	$	885	$	885
Public utilities	87		0		87
Banks/financial institutions	38		0		38
Other corporate	472		0		472
Total borrowings	$	597	$	885	$	1,482
Gross amount of recognized liabilities for securities lending transactions					$	1,482
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

Securities Lending Transactions Accounted for as Secured Borrowings
December 31, 2016
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Public utilities	$	62	$	0	$	62
Banks/financial institutions	34		0		34
Other corporate	430		0		430
Total borrowings	$	526	$	0	$	526
Gross amount of recognized liabilities for securities lending transactions					$	526
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

We did not have any repurchase agreements or repurchase-to-maturity transactions outstanding as of March 31, 2017 and December 31, 2016, respectively.

Certain fixed-maturity securities can be pledged as collateral as part of derivative transactions, or pledged to support state deposit requirements or certain investment programs. For additional information regarding pledged securities related to derivative transactions, see Note 4.

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DERIVATIVE INSTRUMENTS

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS

Our freestanding derivative financial instruments have historically consisted of: (1) foreign currency swaps and credit default swaps that are associated with investments in special-purpose entities, including VIEs where we are the primary beneficiary; (2) foreign currency forwards and options used in hedging foreign exchange risk on U.S. dollar-denominated investments in Aflac Japan's portfolio; (3) foreign currency forwards and options used to hedge foreign exchange risk from our net investment in Aflac Japan and economically hedge certain portions of forecasted cash flows denominated in yen; (4) swaps associated with our notes payable, consisting of cross-currency interest rate swaps, also referred to as foreign currency swaps, associated with certain senior notes and our subordinated debentures; and (5) options on interest rate swaps (or interest rate swaptions) and futures used to hedge interest rate risk for certain available-for-sale securities. We do not use derivative financial instruments for trading purposes, nor do we engage in leveraged derivative transactions. Some of our derivatives are designated as cash flow hedges, fair value hedges or net investment hedges; however, other derivatives do not qualify for hedge accounting or we elect not to designate them as an accounting hedge. We utilize a net investment hedge to mitigate foreign exchange exposure resulting from our net investment in Aflac Japan. In addition to designating derivatives as hedging instruments, we have designated the majority of the Parent Company's yen-denominated liabilities (notes payable and loans) as nonderivative hedging instruments for this net investment hedge.

Derivative Types

We enter into foreign currency swaps pursuant to which we exchange an initial principal amount in one currency for an initial principal amount of another currency, with an agreement to re-exchange the currencies at a future date at an agreed upon exchange rate. There may also be periodic exchanges of payments at specified intervals based on the agreed upon rates and notional amounts. Foreign currency swaps are used primarily in the consolidated VIEs in our Aflac Japan portfolio to convert foreign-denominated cash flows to yen, the functional currency of Aflac Japan, in order to minimize cash flow fluctuations. We also use foreign currency swaps to economically convert certain of our U.S. dollar-denominated senior note and subordinated debenture principal and interest obligations into yen-denominated obligations.

Foreign currency forwards and options are executed for the Aflac Japan segment in order to hedge the currency risk on the carrying value of certain U.S. dollar-denominated investments. The average maturity of these forwards and options can change depending on factors such as market conditions and types of investments being held. In forward transactions, Aflac Japan agrees with another party to buy a fixed amount of yen and sell a corresponding amount of U.S. dollars at a specified future date. Aflac Japan also executes foreign currency option transactions in a collar strategy, where Aflac Japan agrees with another party to simultaneously purchase a fixed amount of U.S. dollar put options and sell U.S. dollar call options. The combination of these two actions results in no net premium being paid (i.e. a costless or zero-cost collar). The foreign currency forwards and options are used in fair value hedging relationships to mitigate the foreign exchange risk associated with U.S. dollar-denominated investments supporting yen-denominated liabilities.

Foreign currency forwards and options are also used to hedge the currency risk associated with the net investment in Aflac Japan. In these forward transactions, Aflac agrees with another party to buy a fixed amount of U.S. dollars and sell a corresponding amount of yen at a specified future date. In the option transactions, we use a combination of foreign currency options to protect expected future cash flows by simultaneously purchasing yen put options (options that protect against a weakening yen) and selling yen call options (options that limit participation in a strengthening yen). The combination of these two actions results in no net premium being paid (i.e. a costless or zero-cost collar).

The only CDS that we currently hold relates to components of an investment in a VIE and is used to assume credit risk related to an individual security. This CDS contract entitles the consolidated VIE to receive periodic fees in exchange for an obligation to compensate the derivative counterparties should the referenced security issuer experience a credit event, as defined in the contract.

Interest rate swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Typically, at the time a swap is entered into, the cash flow streams exchanged by the counterparties are equal in value. No cash or principal payments are exchanged at the inception of the contract. Interest rate swaps are primarily used to convert interest receipts on floating-rate fixed-maturity securities contracts to fixed rates. These derivatives are predominantly used to better match cash receipts from assets with cash disbursements required to fund liabilities.

Interest rate swaptions are options on interest rate swaps. Interest rate collars are combinations of two swaption positions and are executed in order to hedge certain U.S. dollar-denominated available-for-sale securities that are held in the Aflac Japan segment. We use collars to protect against significant changes in the fair value associated with our U.S. dollar-denominated available-for-sale securities due to interest rates. In order to maximize the efficiency of the collars while minimizing cost, we set the strike price on each collar so that the premium paid for the ‘payer leg’ is offset by the premium received for having sold the ‘receiver leg.'

Periodically, we may enter into other derivative transactions depending on general economic conditions.

Derivative Balance Sheet Classification

The tables below summarize the balance sheet classification of our derivative fair value amounts, as well as the gross asset and liability fair value amounts. The fair value amounts presented do not include income accruals. The notional amount of derivative contracts represents the basis upon which pay or receive amounts are calculated and are not reflective of exposure or credit risk.

		March 31, 2017										December 31, 2016
(In millions)				Asset Derivatives			Liability Derivatives							Asset Derivatives			Liability Derivatives
Hedge Designation/ Derivative Type	Notional Amount			Fair Value			Fair Value				Notional Amount			Fair Value			Fair Value
Cash flow hedges:
Foreign currency swaps		$	75		$	0		$	(6	)		$	75		$	0		$	(10	)
Total cash flow hedges		75			0			(6		)		75			0			(10		)
Fair value hedges:
Foreign currency forwards		9,705			10			(428		)		10,965			0			(759		)
Foreign currency options		5,560			5			(4		)		4,224			2			(32		)
Total fair value hedges		15,265			15			(432		)		15,189			2			(791		)
Net investment hedge:
Foreign currency forwards		236			0			(4		)		209			5			(2		)
Foreign currency options		924			20			(18		)		843			41			(17		)
Total net investment hedge		1,160			20			(22		)		1,052			46			(19		)
Non-qualifying strategies:
Foreign currency swaps		5,890			318			(218		)		6,266			490			(220		)
Foreign currency forwards		11,972			225			(421		)		21,218			667			(956		)
Foreign currency options		0			0			0				41			0			(2		)
Credit default swaps		89			2			0				86			2			0
Total non-qualifying strategies		17,951			545			(639		)		27,611			1,159			(1,178		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)
Balance Sheet Location
Other assets		$	14,115		$	580		$	0			$	18,329		$	1,207		$	0
Other liabilities		20,336			0			(1,099		)		25,598			0			(1,998		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

Cash Flow Hedges

Certain of our consolidated VIEs have foreign currency swaps that qualify for hedge accounting treatment. For those that have qualified, we have designated the derivative as a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset (“cash flow” hedge). We expect to continue this hedging activity for a weighted-average period of approximately nine years. The remaining derivatives in our consolidated VIEs that have not qualified for hedge accounting are included in “non-qualifying strategies.”

Fair Value Hedges

We designate and account for certain foreign currency forwards and options as fair value hedges when they meet the requirements for hedge accounting. These foreign currency forwards and options hedge the foreign currency exposure of certain U.S. dollar-denominated investments. We recognize gains and losses on these derivatives and the related hedged items in current earnings within derivative and other gains (losses). The change in the fair value of the foreign currency forwards related to the changes in the difference between the spot rate and the forward price is excluded from the assessment of hedge effectiveness. The change in fair value of the foreign currency option related to the time value of the option is excluded from the assessment of hedge effectiveness.

We designate and account for interest rate swaptions as fair value hedges when they meet the requirements for hedge accounting. These interest rate swaptions hedge the interest rate exposure of certain U.S. dollar-denominated fixed maturity securities within the investment portfolio of our Aflac Japan segment. We recognize gains and losses on these derivatives and the related hedged items in current earnings within derivative and other gains (losses). The change in the fair value of the interest rate swaptions related to the time value of the option is excluded from the assessment of hedge effectiveness.

The following table presents the gains and losses on derivatives and the related hedged items in fair value hedges.

Fair Value Hedging Relationships

(In millions)		Hedging Derivatives								Hedged Items
Hedging Derivatives	Hedged Items	Total Gains (Losses)			Gains (Losses) Excluded from Effectiveness Testing			Gains (Losses) Included in Effectiveness Testing		Gains (Losses)			Ineffectiveness Recognized for Fair Value Hedge
Three Months Ended March 31, 2017:
Foreign currency forwards	Fixed-maturity and equity securities	$	341		$	(48	)	$	389	$	(372	)	$	17
Foreign currency options	Fixed-maturity securities	24			13			11		(10		)	1
Three Months Ended March 31, 2016:
Foreign currency forwards	Fixed-maturity securities	$	857		$	(44	)	$	901	$	(882	)	$	19
Foreign currency options	Fixed-maturity securities	(1		)	(1		)	0		0			0

Net Investment Hedge

Our investment in Aflac Japan is affected by changes in the yen/dollar exchange rate. To mitigate this exposure, we have designated the Parent Company's yen-denominated liabilities (see Note 8) as non-derivative hedges and designated foreign currency forwards and options as derivative hedges of the foreign currency exposure of our net investment in Aflac Japan.

As of March 31, 2017, we had foreign exchange forwards and options as part of a hedge on 130.1 billion yen of future profit repatriation from Aflac Japan.

Our net investment hedge was effective during the three-month periods ended March 31, 2017 and 2016, respectively.

Non-qualifying Strategies

For our derivative instruments in consolidated VIEs that do not qualify for hedge accounting treatment, all changes in their fair value are reported in current period earnings within derivative and other gains (losses). The amount of gain or loss recognized in earnings for our VIEs is attributable to the derivatives in those investment structures. While the change in value of the swaps is recorded through current period earnings, the change in value of the available-for-sale fixed-maturity or perpetual securities associated with these swaps is recorded through other comprehensive income.

We have cross-currency interest rate swap agreements related to our $550 million senior notes due March 2020, $350 million senior notes due February 2022, $700 million senior notes due June 2023, $750 million senior notes due November 2024, $450 million senior notes due March 2025, and $500 million subordinated debentures due September 2052. Changes in the values of these swaps are recorded through current period earnings. For additional information regarding these swaps, see Note 8 in this report and Note 9 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

In 2016, we began using foreign exchange forwards to mitigate the currency risk of our U.S. dollar-denominated middle market loan and commercial mortgage loan portfolios held within the Aflac Japan segment. As of March 31, 2017, the outstanding derivative notional amounts associated with these U.S. dollar-denominated middle market loans and commercial mortgage loans were approximately $198 million and $780 million, respectively. We have not elected to apply hedge accounting for these middle market loans and commercial mortgage loans. The change in fair value of the foreign exchange forwards and the foreign currency remeasurement of the middle market loans and commercial mortgage loans are each recorded through current period earnings, and generally offset each other.

Impact of Derivatives and Hedging Instruments

The following table summarizes the impact to realized investment gains (losses) and other comprehensive income (loss) from all derivatives and hedging instruments.

	Three Months Ended March 31,
	2017								2016
(In millions)	Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)				Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)
Qualifying hedges:
Cash flow hedges:
Foreign currency swaps		$	0			$	2			$	0			$	3
Total cash flow hedges		0				2				0				3
Fair value hedges:
Foreign currency forwards(2)		(31		)		0				(25		)		0
Foreign currency options(2)		14				0				(1		)		0
Total fair value hedges		(17		)		0				(26		)		0
Net investment hedge:
Non-derivative hedging instruments		0				(17		)		0				(15		)
Foreign currency forwards		0				(9		)		0				(50		)
Foreign currency options		0				(23		)		0				(16		)
Total net investment hedge		0				(49		)		0				(81		)
Non-qualifying strategies:
Foreign currency swaps		(8		)		0				10				0
Foreign currency forwards		(27		)		0				11				0
Credit default swaps		0				0				1				0
Total non-qualifying strategies		(35		)		0				22				0
Total		$	(52	)		$	(47	)		$	(4	)		$	(78	)

⁽¹⁾ Cash flow hedge items are recorded as unrealized gains (losses) on derivatives and net investment hedge items are recorded in the unrealized foreign currency translation gains (losses) line in the consolidated statement of comprehensive income (loss).

⁽²⁾ Impact shown net of effect of hedged items (see Fair Value Hedges section of this Note 4 for further detail)

We reclassified a de minimis amount from accumulated other comprehensive income (loss) into earnings related to our designated cash flow hedges for the three-month periods ended March 31, 2017 and 2016. There was no gain orloss reclassified from accumulated other comprehensive income (loss) into earnings related to the net investment hedge for the three-month periods ended March 31, 2017 and 2016. As of March 31, 2017, deferred gains and losses on derivative instruments recorded in accumulated other comprehensive income that are expected to be reclassified to earnings during the next twelve months were immaterial.

Credit Risk Assumed through Derivatives

For the foreign currency and credit default swaps associated with our VIE investments for which we are the primary beneficiary, we bear the risk of foreign exchange loss due to counterparty default even though we are not a direct counterparty to those contracts. We are a direct counterparty to the foreign currency swaps that we have entered into in connection with certain of our senior notes and subordinated debentures; foreign currency forwards; foreign currency options; and interest rate swaptions, and therefore we are exposed to credit risk in the event of nonperformance by the counterparties in those contracts. The risk of counterparty default for our VIE swaps, foreign currency swaps, certain foreign currency forwards, foreign currency options and interest rate swaptions is mitigated by collateral posting requirements that counterparties to those transactions must meet. As of March 31, 2017, there were 16 counterparties to our derivative agreements, with five comprising 67% of the aggregate notional amount. The counterparties to these derivatives are financial institutions with the following credit ratings:

	March 31, 2017										December 31, 2016
(In millions)	Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value				Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value
Counterparties' credit rating:
AA		$	6,391		$	125		$	(172	)		$	6,844		$	247		$	(308	)
A		27,619			449			(862		)		36,019			900			(1,621		)
BBB		441			6			(65		)		1,064			60			(69		)
Total		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

We engage in derivative transactions directly with unaffiliated third parties under International Swaps and Derivatives Association, Inc. (ISDA) agreements and other documentation. Most of the ISDA agreements also include Credit Support Annexes (CSAs) provisions, which generally provide for two-way collateral postings at the first dollar of exposure. We mitigate the risk that counterparties to transactions might be unable to fulfill their contractual obligations by monitoring counterparty credit exposure and collateral value while generally requiring that collateral be posted at the outset of the transaction. In addition, a significant portion of the derivative transactions have provisions that give the counterparty the right to terminate the transaction upon a downgrade of Aflac’s financial strength rating. The actual amount of payments that we could be required to make, depends on market conditions, the fair value of outstanding affected transactions, and other factors prevailing at and after the time of the downgrade.

Collateral posted by us to third parties for derivative transactions can generally be repledged or resold by the counterparties. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position by counterparty was approximately $640 million and $1.2 billion as of March 31, 2017 and December 31, 2016, respectively. We are generally allowed to sell or repledge collateral obtained from our derivative counterparties, although we do not typically exercise such rights. (See the Offsetting tables below for collateral posted or received as of the reported balance sheet dates.)

Offsetting of Financial Instruments and Derivatives

Some of the Company's derivative instruments are subject to enforceable master netting arrangements that provide for the net settlement of all derivative contracts between the Parent Company or Aflac and its respective counterparty in the event of default or upon the occurrence of certain termination events. Collateral support agreements with the master netting arrangements generally provide that the Company will receive or pledge financial collateral at the first dollar of exposure.

We have securities lending agreements with unaffiliated financial institutions that post collateral to us in return for the use of our fixed maturity securities (see Note 3). When we have entered into securities lending agreements with the same counterparty, the agreements generally provide for net settlement in the event of default by the counterparty. This right of set-off allows us to keep and apply collateral received if the counterparty failed to return the securities borrowed from us as contractually agreed.

The tables below summarize our derivatives and securities lending transactions, and as reflected in the tables, in accordance with U.S. GAAP, our policy is to not offset these financial instruments in the Consolidated Balance Sheets.

Offsetting of Financial Assets and Derivative Assets

March 31, 2017
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	434		$	0		$	434		$	(336	)	$	0		$	(97	)		$	1
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		146						146													146
Total derivative       assets		580			0			580			(336		)	0			(97		)		147
Securities lending    and similar    arrangements		1,445			0			1,445			0			0			(1,445		)		0
Total		$	2,025		$	0		$	2,025		$	(336	)	$	0		$	(1,542	)		$	147

December 31, 2016
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	1,080		$	0		$	1,080		$	(698	)	$	0		$	(382	)		$	0
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		127						127													127
Total derivative       assets		1,207			0			1,207			(698		)	0			(382		)		127
Securities lending    and similar    arrangements		513			0			513			0			0			(513		)		0
Total		$	1,720		$	0		$	1,720		$	(698	)	$	0		$	(895	)		$	127

Offsetting of Financial Liabilities and Derivative Liabilities

March 31, 2017
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(974	)		$	0		$	(974	)		$	336	$	527		$	23		$	(88	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(125		)					(125		)										(125		)
Total derivative       liabilities		(1,099		)		0			(1,099		)		336		527			23			(213		)
Securities lending    and similar    arrangements		(1,482		)		0			(1,482		)		1,445		0			0			(37		)
Total		$	(2,581	)		$	0		$	(2,581	)		$	1,781	$	527		$	23		$	(250	)

December 31, 2016
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(1,852	)		$	0		$	(1,852	)		$	698	$	1,130		$	21		$	(3	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(146		)					(146		)										(146		)
Total derivative       liabilities		(1,998		)		0			(1,998		)		698		1,130			21			(149		)
Securities lending    and similar    arrangements		(526		)		0			(526		)		513		0			0			(13		)
Total		$	(2,524	)		$	0		$	(2,524	)		$	1,211	$	1,130		$	21		$	(162	)

For additional information on our financial instruments, see the accompanying Notes 1, 3 and 5 and Notes 1, 3 and 5 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Fair Value Hierarchy

U.S. GAAP specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. These two types of inputs create three valuation hierarchy levels. Level 1 valuations reflect quoted market prices for identical assets or liabilities in active markets. Level 2 valuations reflect quoted market prices for similar assets or liabilities in an active market, quoted market prices for identical or similar assets or liabilities in non-active markets or model-derived valuations in which all significant valuation inputs are observable in active markets. Level 3 valuations reflect valuations in which one or more of the significant inputs are not observable in an active market.

The following tables present the fair value hierarchy levels of the Company's assets and liabilities that are measured and carried at fair value on a recurring basis.

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	28,457		$	863		$	0		$	29,320
Municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities		0			309			195			504
Public utilities		0			7,827			16			7,843
Sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions		0			6,521			24			6,545
Other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions		0			1,551			0			1,551
Other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities		1,339			6			4			1,349
Other assets:
Foreign currency swaps		0			174			144			318
Foreign currency forwards		0			235			0			235
Foreign currency options		0			25			0			25
Credit default swaps		0			0			2			2
Total other assets		0			434			146			580
Other investments		141			0			0			141
Cash and cash equivalents		4,205			0			0			4,205
Total assets		$	34,142		$	50,560		$	420		$	85,122
Liabilities:
Foreign currency swaps		$	0		$	99		$	125		$	224
Foreign currency forwards		0			853			0			853
Foreign currency options		0			22			0			22
Total liabilities		$	0		$	974		$	125		$	1,099

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	25,387		$	827		$	0		$	26,214
Municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities		0			7,667			16			7,683
Sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions		0			6,038			25			6,063
Other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions		0			1,420			0			1,420
Other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities		1,300			6			3			1,309
Other assets:
Foreign currency swaps		0			365			125			490
Foreign currency forwards		0			672			0			672
Foreign currency options		0			43			0			43
Credit default swaps		0			0			2			2
Total other assets		0			1,080			127			1,207
Other investments		276			0			0			276
Cash and cash equivalents		4,859			0			0			4,859
Total assets		$	31,822		$	50,853		$	369		$	83,044
Liabilities:
Foreign currency swaps		$	0		$	84		$	146		$	230
Foreign currency forwards		0			1,717			0			1,717
Foreign currency options		0			51			0			51
Total liabilities		$	0		$	1,852		$	146		$	1,998

U.S. GAAP requires disclosure of the fair value of certain financial instruments including those that are not carried at fair value. The carrying amounts for cash and cash equivalents, other investments (excluding loan receivables), receivables, accrued investment income, accounts payable, cash collateral and payables for security transactions approximated their fair values due to the nature of these instruments. Liabilities for future policy benefits and unpaid policy claims are not financial instruments as defined by U.S. GAAP.

The following tables present the carrying amount and fair value categorized by fair value hierarchy level for the Company's financial instruments that are not carried at fair value.

	March 31, 2017
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	21,493		$	26,607		$	0		$	0		$	26,607
Municipalities		363			0			467			0			467
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,324			0			3,693			0			3,693
Sovereign and supranational		2,702			0			3,009			0			3,009
Banks/financial institutions		3,650			0			3,830			0			3,830
Other corporate		2,839			0			3,285			0			3,285
Other investments (1)		1,309			0			0			1,288			1,288
Total assets		$	35,710		$	26,607		$	14,294		$	1,310		$	42,211
Liabilities:
Other policyholders’ funds		$	6,945		$	0		$	0		$	6,824		$	6,824
Notes payable (excluding capital leases)		5,230			0			5,226			266			5,492
Total liabilities		$	12,175		$	0		$	5,226		$	7,090		$	12,316

⁽¹⁾Excludes policy loans of $197 and equity method investments of $54, at carrying value

	December 31, 2016
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	20,702		$	26,040		$	0		$	0		$	26,040
Municipalities		350			0			457			0			457
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,201			0			3,536			0			3,536
Sovereign and supranational		2,602			0			2,877			0			2,877
Banks/financial institutions		3,731			0			3,900			0			3,900
Other corporate		2,734			0			3,179			0			3,179
Other investments		1,174			0			0			1,142			1,142
Total assets		$	34,524		$	26,040		$	13,959		$	1,164		$	41,163
Liabilities:
Other policyholders’ funds		$	6,659		$	0		$	0		$	6,540		$	6,540
Notes payable (excluding capital leases)		5,339			0			0			5,530			5,530
Total liabilities		$	11,998		$	0		$	0		$	12,070		$	12,070

Fair Value of Financial Instruments

Fixed maturities, perpetual securities, and equity securities

We determine the fair values of our fixed maturity securities, perpetual securities, and public and privately issued equity securities using the following approaches or techniques: price quotes and valuations from third party pricing vendors (including quoted market prices readily available from public exchange markets) and non-binding price quotes we obtain from outside brokers.

A third party pricing vendor has developed valuation models to determine fair values of privately issued securities to reflect the impact of the persistent economic environment and the changing regulatory framework. These models are discounted cash flow (DCF) valuation models, but also use information from related markets, specifically the CDS market to estimate expected cash flows. These models take into consideration any unique characteristics of the securities and make various adjustments to arrive at an appropriate issuer-specific loss adjusted credit curve. This credit curve is then used with the relevant recovery rates to estimate expected cash flows and modeling of additional features, including illiquidity adjustments, if necessary, to price the security by discounting those loss adjusted cash flows. In cases where a credit curve cannot be developed from the specific security features, the valuation methodology takes into consideration other market observable inputs, including: 1) the most appropriate comparable security(ies) of the issuer; 2) issuer-specific CDS spreads; 3) bonds or CDS spreads of comparable issuers with similar characteristics such as rating, geography, or sector; or 4) bond indices that are comparative in rating, industry, maturity and region.

The pricing data and market quotes we obtain from outside sources, including third party pricing services, are reviewed internally for reasonableness. If a fair value appears unreasonable, we will re-examine the inputs and assess the reasonableness of the pricing data with the vendor. Additionally, we may compare the inputs to relevant market indices and other performance measurements. The output of this analysis is presented to the Company's Valuation and Classification Subcommittee (VCS). Based on the analysis provided to the VCS, the valuation is confirmed or may be revised if there is evidence of a more appropriate estimate of fair value based on available market data. We have performed verification of the inputs and calculations in any valuation models to confirm that the valuations represent reasonable estimates of fair value.

The fixed maturities classified as Level 3 consist of securities for which there are limited or no observable valuation inputs. For Level 3 securities, we estimate the fair value of these securities by obtaining non-binding broker quotes from a limited number of brokers. These brokers base their quotes on a combination of their knowledge of the current pricing environment and market conditions. We consider these inputs to be unobservable. We also consider a variety of significant valuation inputs in the valuation process, including forward exchange rates, yen swap rates, dollar swap rates, interest rate volatilities, credit spread data on specific issuers, assumed default and default recovery rates, and certain probability assumptions. In obtaining these valuation inputs, we have determined that certain pricing assumptions and data used by our pricing sources are difficult to validate or corroborate by the market and/or appear to be internally developed rather than observed in or corroborated by the market. The use of these unobservable valuation inputs causes more subjectivity in the valuation process for these securities.

For the periods presented, we have not adjusted the quotes or prices we obtain from the pricing services and brokers we use.

The following tables present the pricing sources for the fair values of our fixed maturities, perpetual securities, and equity securities.

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	28,457		$	863		$	0		$	29,320
Total government and agencies		28,457			863			0			29,320
Municipalities:
Third party pricing vendor		0			1,322			0			1,322
Total municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities:
Third party pricing vendor		0			309			0			309
Broker/other		0			0			195			195
Total mortgage- and asset-backed securities		0			309			195			504
Public utilities:
Third party pricing vendor		0			7,827			0			7,827
Broker/other		0			0			16			16
Total public utilities		0			7,827			16			7,843
Sovereign and supranational:
Third party pricing vendor		0			1,386			0			1,386
Total sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions:
Third party pricing vendor		0			6,521			0			6,521
Broker/other		0			0			24			24
Total banks/financial institutions		0			6,521			24			6,545
Other corporate:
Third party pricing vendor		0			30,122			0			30,122
Broker/other		0			0			35			35
Total other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,551			0			1,551
Total banks/financial institutions		0			1,551			0			1,551
Other corporate:
Third party pricing vendor		0			219			0			219
Total other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities:
Third party pricing vendor		1,339			6			0			1,345
Broker/other		0			0			4			4
Total equity securities		1,339			6			4			1,349
Total securities available for sale		$	29,796		$	50,126		$	274		$	80,196

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,607		$	0		$	0		$	26,607
Total government and agencies		26,607			0			0			26,607
Municipalities:
Third party pricing vendor		0			467			0			467
Total municipalities		0			467			0			467
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,693			0			3,693
Total public utilities		0			3,693			0			3,693
Sovereign and supranational:
Third party pricing vendor		0			3,009			0			3,009
Total sovereign and supranational		0			3,009			0			3,009
Banks/financial institutions:
Third party pricing vendor		0			3,830			0			3,830
Total banks/financial institutions		0			3,830			0			3,830
Other corporate:
Third party pricing vendor		0			3,285			0			3,285
Total other corporate		0			3,285			0			3,285
Total securities held to maturity		$	26,607		$	14,294		$	22		$	40,923

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	25,387		$	827		$	0		$	26,214
Total government and agencies		25,387			827			0			26,214
Municipalities:
Third party pricing vendor		0			1,295			0			1,295
Total municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities:
Third party pricing vendor		0			1,139			0			1,139
Broker/other		0			0			198			198
Total mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities:
Third party pricing vendor		0			7,667			0			7,667
Broker/other		0			0			16			16
Total public utilities		0			7,667			16			7,683
Sovereign and supranational:
Third party pricing vendor		0			1,469			0			1,469
Total sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions:
Third party pricing vendor		0			6,038			0			6,038
Broker/other		0			0			25			25
Total banks/financial institutions		0			6,038			25			6,063
Other corporate:
Third party pricing vendor		0			29,699			0			29,699
Total other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,420			0			1,420
Total banks/financial institutions		0			1,420			0			1,420
Other corporate:
Third party pricing vendor		0			213			0			213
Total other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities:
Third party pricing vendor		1,300			6			0			1,306
Broker/other		0			0			3			3
Total equity securities		1,300			6			3			1,309
Total securities available for sale		$	26,687		$	49,773		$	242		$	76,702

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,040		$	0		$	0		$	26,040
Total government and agencies		26,040			0			0			26,040
Municipalities:
Third party pricing vendor		0			457			0			457
Total municipalities		0			457			0			457
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,536			0			3,536
Total public utilities		0			3,536			0			3,536
Sovereign and supranational:
Third party pricing vendor		0			2,877			0			2,877
Total sovereign and supranational		0			2,877			0			2,877
Banks/financial institutions:
Third party pricing vendor		0			3,900			0			3,900
Total banks/financial institutions		0			3,900			0			3,900
Other corporate:
Third party pricing vendor		0			3,179			0			3,179
Total other corporate		0			3,179			0			3,179
Total securities held to maturity		$	26,040		$	13,959		$	22		$	40,021

The following is a discussion of the determination of fair value of our remaining financial instruments.

Derivatives

We use derivative instruments to manage the risk associated with certain assets. However, the derivative instrument may not be classified in the same fair value hierarchy level as the associated asset. Inputs used to value derivatives include, but are not limited to, interest rates, credit spreads, foreign currency forward and spot rates, and interest volatility.

The fair values of the foreign currency forwards, options, and interest rate swaptions associated with certain investments; the foreign currency forwards and options used to hedge foreign exchange risk from our net investment in Aflac Japan and economically hedge certain portions of forecasted cash flows denominated in yen; and the foreign currency swaps associated with certain senior notes and our subordinated debentures are based on the amounts we would expect to receive or pay. The determination of the fair value of these derivatives is based on observable market inputs, therefore they are classified as Level 2.

For derivatives associated with VIEs where we are the primary beneficiary, we are not the direct counterparty to the swap contracts. As a result, the fair value measurements incorporate the credit risk of the collateral associated with the VIE. We receive valuations from a third party pricing vendor for these derivatives. Based on an analysis of these derivatives and a review of the methodology employed by the pricing vendor, we determined that due to the long duration of these swaps and the need to extrapolate from short-term observable data to derive and measure long-term inputs, certain inputs, assumptions and judgments are required to value future cash flows that cannot be corroborated by current inputs or current observable market data. As a result, the derivatives associated with our consolidated VIEs are classified as Level 3 of the fair value hierarchy.

Loan Receivables

Our loan receivables do not have readily determinable market prices and generally lack market liquidity. Fair values for loan receivables are determined based on the present value of expected future cash flows discounted at the applicable U.S. Treasury or London Interbank Offered Rate (LIBOR) yield plus an appropriate spread that considers other risk factors, such as credit and liquidity risk. These spreads are provided by the applicable asset managers based on their knowledge of the current loan pricing environment and market conditions. The spreads are a significant component of the pricing inputs and are generally considered unobservable. Therefore, these investments have been assigned a Level 3 within the fair value hierarchy. Loan receivables are included in other investments on the consolidated balance sheets.

Other policyholders' funds

The largest component of the other policyholders' funds liability is our annuity line of business in Aflac Japan. Our annuities have fixed benefits and premiums. For this product, we estimated the fair value to be equal to the cash surrender value. This is analogous to the value paid to policyholders on the valuation date if they were to surrender their policy. We periodically check the cash value against discounted cash flow projections for reasonableness. We consider our inputs for this valuation to be unobservable and have accordingly classified this valuation as Level 3.

Notes payable

As of March 31, 2017, the fair values of our publicly issued notes payable classified as Level 2 were obtained from third party pricing vendors. As of December 31, 2016, the fair values of these notes payable were obtained from a limited number of independent brokers and classified as Level 3 within the fair value hierarchy. We consider this current valuation technique to be an improvement from the previous valuation technique. The fair values of our yen-denominated loans approximate their carrying values.

Transfers between Hierarchy Levels and Level 3 Rollforward

There were no transfers between Level 1 and 2 for the three-month periods ended March 31, 2017 and 2016, respectively.

The following tables present the changes in fair value of our available-for-sale investments and derivatives classified as Level 3.

Three Months Ended March 31, 2017
	Fixed Maturities										Equity Securities			Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions			Other Corporate					Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	198		$	16	$	25		$	0	$	3		$	(21	)	$	2	$	223
Realized investment gains (losses) included    in earnings	0			0		0			0		0			38			0		38
Unrealized gains (losses) included in other    comprehensive income (loss)	6			0		(1		)	0		0			2			0		7
Purchases, issuances, sales and settlements:
Purchases	0			0		0			35		2			0			0		37
Issuances	0			0		0			0		0			0			0		0
Sales	0			0		0			0		(1		)	0			0		(1		)
Settlements	(9		)	0		0			0		0			0			0		(9		)
Transfers into Level 3	0			0		0			0		0			0			0		0
Transfers out of Level 3	0			0		0			0		0			0			0		0
Balance, end of period	$	195		$	16	$	24		$	35	$	4		$	19		$	2	$	295
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0		$	0	$	0		$	38		$	0	$	38

⁽¹⁾ Derivative assets and liabilities are presented net

Three Months Ended March 31, 2016
	Fixed Maturities							Equity Securities		Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions				Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	220		$	0	$	26	$	3	$	(192	)	$	1	$	58
Realized investment gains (losses) included    in earnings	0			0		0		0		125			1		126
Unrealized gains (losses) included in other    comprehensive income (loss)	21			0		0		0		4			0		25
Purchases, issuances, sales and settlements:
Purchases	0			0		0		0		0			0		0
Issuances	0			0		0		0		0			0		0
Sales	0			0		0		0		0			0		0
Settlements	(4		)	0		0		0		0			0		(4		)
Transfers into Level 3	0			0		0		0		0			0		0
Transfers out of Level 3	0			0		0		0		0			0		0
Balance, end of period	$	237		$	0	$	26	$	3	$	(63	)	$	2	$	205
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0	$	0	$	125		$	1	$	126

⁽¹⁾ Derivative assets and liabilities are presented net

Fair Value Sensitivity

Level 3 Significant Unobservable Input Sensitivity

The following tables summarize the significant unobservable inputs used in the valuation of our Level 3 available-for-sale investments and derivatives. Included in the tables are the inputs or range of possible inputs that have an effect on the overall valuation of the financial instruments.

March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	195	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		24		Consensus pricing	Offered quotes	N/A	(d)
Other corporate		35		Discounted cash flow	Historical volatility	N/A	(e)
Equity securities		4		Net asset value	Offered quotes	$1 - $728 ($8)
Other assets:
Foreign currency swaps		25		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		50		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	10 - 79 bps
		69		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	61.55% - 66.55%	(e)
					CDS spreads	48 bps
					Recovery rate	36.69%
Total assets		$	420

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices.

March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	106	Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		13		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	15 - 168 bps
		6		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Total liabilities		$	125

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	198	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		25		Consensus pricing	Offered quotes	N/A	(d)
Equity securities		3		Net asset value	Offered quotes	$1-$701 ($8)
Other assets:
Foreign currency swaps		16		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		29		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	16 - 88 bps
		80		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	52.18% - 56.07%	(e)
					CDS spreads	54 bps
					Recovery rate	36.69%
Total assets		$	369

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices

December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	113	Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		23		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	24 - 216 bps
		10		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Total liabilities		$	146

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

The following is a discussion of the significant unobservable inputs or valuation techniques used in determining the fair value of securities and derivatives classified as Level 3.

Net Asset Value

We hold certain unlisted equity securities whose fair value is derived based on the financial statements published by the investee. These securities do not trade on an active market and the valuations derived are dependent on the availability of timely financial reporting of the investee. Net asset value is an unobservable input in the determination of fair value ofequity securities.

Offered Quotes

In circumstances where our valuation model price is overridden because it implies a value that is not consistent with current market conditions, we will solicit bids from a limited number of brokers. We also receive unadjusted prices from brokers for our mortgage and asset-backed securities. These quotes are non-binding but are reflective of valuation best estimates at that particular point in time. Offered quotes are an unobservable input in the determination of fair value of mortgage- and asset-backed securities, certain banks/financial institutions, certain other corporate, and equity securities investments.

Interest Rates, CDS Spreads, Foreign Exchange Rates

The significant drivers of the valuation of the interest and foreign exchange swaps are interest rates, foreign exchange rates and CDS spreads. Our swaps have long maturities that increase the sensitivity of the swaps to interest rate fluctuations. Since most of our yen-denominated cross currency swaps are in a net liability position, an increase in interest rates will decrease the liabilities and increase the value of the swap.

Foreign exchange swaps also have a lump-sum final settlement of foreign exchange principal receivables at the termination of the swap. An increase in yen interest rates will decrease the value of the final settlement foreign exchange receivables and decrease the value of the swap, and an increase in U.S. dollar interest rates will increase the swap value.

A similar sensitivity pattern is observed for the foreign exchange rates. When the spot U.S. dollar/Japanese yen (USD/JPY) foreign exchange rate decreases and the swap is receiving a final exchange payment in JPY, the swap value will increase due to the appreciation of the JPY. Most of our swaps are designed to receive payments in JPY at the termination and will thus be impacted by the USD/JPY foreign exchange rate in this way. In cases where there is no final foreign exchange receivable in JPY and we are paying JPY as interest payments and receiving USD, a decrease in the foreign exchange rate will lead to a decrease in the swap value.

The extinguisher feature in most of our swaps results in a cessation of cash flows and no further payments between the parties to the swap in the event of a default on the referenced or underlying collateral. To price this feature, we apply the survival probability of the referenced entity to the projected cash flows. The survival probability uses the CDS spreads and recovery rates to adjust the present value of the cash flows. For extinguisher swaps with positive values, an increase in CDS spreads decreases the likelihood of receiving the final exchange payments and reduces the value of the swap.

Due to the long duration of these swaps and the need to extrapolate from short-term observable data to derive and measure long-term inputs, certain inputs, assumptions and judgments are required to value future cash flows that cannot be corroborated by current inputs or current observable market data.

Interest rates, CDS spreads, and foreign exchange rates are unobservable inputs in the determination of fair value of foreign currency swaps.

Base Correlations, CDS Spreads, Recovery Rates

Our remaining collateralized debt obligation (CDO) is a tranche on a basket of single-name credit default swaps. The risk in this synthetic CDO comes from the single-name CDS risk and the correlations between the single names. The valuation of synthetic CDOs is dependent on the calibration of market prices for interest rates, single name CDS default probabilities and base correlation using financial modeling tools. Since there is limited or no observable data available for this tranche, the base correlations must be obtained from commonly traded market tranches such as the CDX and iTraxx indices. From the historical prices of these indices, base correlations can be obtained to develop a pricing curve of CDOs with different seniorities. Since the reference entities of the market indices do not match those in the portfolio underlying the synthetic CDO to be valued, several processing steps are taken to map the CDO in our portfolio to the indices. With the base correlation determined and the appropriate spreads selected, a valuation is calculated. An increase in the CDS spreads in the underlying portfolio leads to a decrease in the value due to higher probability of defaults and losses. The impact on the valuation due to base correlation depends on a number of factors, including the riskiness between market tranches and the modeled tranche based on our portfolio and the equivalence between detachment points in these tranches. Generally speaking, an increase in base correlation will decrease the value of the senior tranches while increasing the value of junior tranches. This may result in a positive or negative value change.

The CDO tranche in our portfolio is a senior mezzanine tranche and, due to the low level of credit support for this type of tranche, exhibits equity-like behavior. As a result, an increase in recovery rates tends to cause its value to decrease.

Base correlations, CDS spreads, and recovery rates are unobservable inputs in the determination of fair value of credit default swaps.

For additional information on our investments and financial instruments, see the accompanying Notes 1, 3 and 4 and Notes 1, 3 and 4 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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POLICY LIABILITIES

3 Months Ended

Mar. 31, 2017

Insurance Loss Reserves [Abstract]

POLICY LIABILITIES

POLICY LIABILITIES

Changes in the liability for unpaid policy claims were as follows for the three-month periods ended March 31:

(In millions)	2017				2016
Unpaid supplemental health claims, beginning of year		$	3,707			$	3,548
Less reinsurance recoverables		27				26
Net balance, beginning of year		3,680				3,522
Add claims incurred during the year related to:
Current year		1,737				1,705
Prior years		(111		)		(142		)
Total incurred		1,626				1,563
Less claims paid during the year on claims incurred during:
Current year		505				493
Prior years		1,055				1,046
Total paid		1,560				1,539
Effect of foreign exchange rate changes on unpaid claims		80				136
Net balance, end of period		3,826				3,682
Add reinsurance recoverables		29				28
Unpaid supplemental health claims, end of period		3,855				3,710
Unpaid life claims, end of period		375				280
Total liability for unpaid policy claims		$	4,230			$	3,990

The incurred claims development related to prior years reflects favorable claims experience compared to previous estimates, primarily in our lines of business in Japan.

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REINSURANCE

3 Months Ended

Mar. 31, 2017

Reinsurance Disclosures [Abstract]

REINSURANCE

REINSURANCE

We enter into fixed quota-share coinsurance agreements with other companies in the normal course of business. For each of our reinsurance agreements, we determine whether the agreement provides indemnification against loss or liability relating to insurance risk in accordance with applicable accounting standards. Reinsurance premiums and benefits paid or provided are accounted for on bases consistent with those used in accounting for the original policies issued and the terms of the reinsurance contracts. Premiums and benefits are reported net of insurance ceded.

We have recorded a deferred profit liability related to reinsurance transactions. The remaining deferred profit liability of $919 million, as of March 31, 2017, included in future policy benefits in the consolidated balance sheet, is being amortized into income over the expected lives of the policies. We also have recorded a reinsurance recoverable for reinsurance transactions, which is included in other assets in the consolidated balance sheet and had a remaining balance of $900 million and $860 million as of March 31, 2017 and December 31, 2016, respectively. The increase in the reinsurance recoverable balance was driven by two aggregating factors: yen strengthening and the growth in reserves related to the business that has been reinsured as the policies age. The spot yen/dollar exchange rate strengthened by approximately 4%and ceded reserves increased approximately 1% from December 31, 2016 to March 31, 2017.

The following table reconciles direct premium income and direct benefits and claims to net amounts after the effect of reinsurance.

	Three Months Ended March 31,
(In millions)	2017				2016
Direct premium income		$	4,724			$	4,690
Ceded to other companies:
Ceded Aflac Japan closed blocks		(130		)		(134		)
Other		(12		)		(12		)
Assumed from other companies:
Retrocession activities		54				56
Other		2				2
Net premium income		$	4,638			$	4,602
Direct benefits and claims		$	3,129			$	3,103
Ceded benefits and change in reserves for future benefits:
Ceded Aflac Japan closed blocks		(122		)		(121		)
Eliminations		13				14
Other		(11		)		(10		)
Assumed from other companies:
Retrocession activities		54				53
Eliminations		(13		)		(14		)
Other		2				0
Benefits and claims, net		$	3,052			$	3,025

These reinsurance transactions are indemnity reinsurance that do not relieve us from our obligations to policyholders. In the event that the reinsurer is unable to meet their obligations, we remain liable for the reinsured claims.

As a part of our capital contingency plan, we entered into a committed reinsurance facility agreement on December 1, 2015 in the amount of approximately 110 billion yen. This reinsurance facility agreement was renewed in 2016 and is effective until December 31, 2017. There are also additional commitment periods of a one-year duration each which are automatically extended unless notification is received from the reinsurer within 60 days prior to the expiration. The reinsurer can withdraw from the committed facility if Aflac‘s Standard and Poor's (S&P) rating drops below BBB-. As of March 31, 2017, we have not executed a reinsurance treaty under this committed reinsurance facility.

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NOTES PAYABLE

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

NOTES PAYABLE

NOTES PAYABLE

A summary of notes payable follows:

(In millions)	March 31, 2017			December 31, 2016
2.65% senior notes paid February 2017		$	0		$	649
2.40% senior notes due March 2020		545			547
4.00% senior notes due February 2022		346			348
3.625% senior notes due June 2023		693			696
3.625% senior notes due November 2024		742			745
3.25% senior notes due March 2025		444			445
2.875% senior notes due October 2026		298			298
6.90% senior notes due December 2039		221			220
6.45% senior notes due August 2040		255			254
4.00% senior notes due October 2046		394			394
5.50% subordinated debentures due September 2052		495			486
Yen-denominated senior notes:
.932% senior notes due January 2027 (principal amount 60.0 billion yen)		531			0
Yen-denominated loans:
Variable interest rate loan due September 2021 (.31% in 2017 and 2016, principal amount 5.0 billion yen)		44			43
Variable interest rate loan due September 2023 (.46% in 2017 and 2016, principal amount 25.0 billion yen)		222			214
Capitalized lease obligations payable through 2024		20			21
Total notes payable		$	5,250		$	5,360

Amounts in the table above are reported net of debt issuance costs and issuance premiums or discounts, if applicable, that are being amortized over the life of the notes.

In January 2017, the Parent Company issued 60.0 billion yen of senior notes through a U.S. public debt offering. The notes bear interest at a fixed rate of .932% per annum, payable semi-annually, and have a 10-year maturity. These notes may only be redeemed before maturity, in whole but not in part, upon the occurrence of certain changes affecting U.S. taxation, as specified in the indenture governing the terms of the issuance.

In February 2017, the Parent Company extinguished $650 million of 2.65% senior notes upon their maturity.

The Parent Company and Aflac have a 364-day uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $100 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. Borrowings under the financing agreement will mature no later than three months after the last drawdown date of October 14, 2017. As of March 31, 2017, we did not have any borrowings outstanding under our $100 million credit agreement.

The Parent Company has a three-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 100.0 billion yen on a revolving basis. Borrowings bear interest at a rate per annum equal to the Tokyo interbank market rate (TIBOR) plus, at our option, either (a) the applicable TIBOR margin during the period from the closing date to the commitment termination date or (b) the applicable TIBOR margin during the term out period. The applicable margin ranges between .35% and .75% during the period from the closing date to the commitment termination date and .70% and 1.50% during the term out period, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company is required to pay a facility fee on the commitments ranging between .30% and .50%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under this credit agreement may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company, and will expire on the earlier of (a) March 31, 2019, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. The credit facility requires compliance with certain financial covenants on a quarterly basis. As of March 31, 2017, we did not have any borrowings outstanding under our 100.0 billion yen revolving credit agreement.

The Parent Company and Aflac have a five-year senior unsecured revolving credit facility agreement with a syndicate of financial institutions that provides for borrowings of up to 55.0 billion yen or the equivalent of yen in U.S. dollars on a revolving basis. This credit agreement provides for borrowings in Japanese yen or the equivalent of Japanese yen in U.S. dollars on a revolving basis. Borrowings bear interest at a rate per annum equal to, at our option, either (a) a eurocurrency rate determined by reference to the LIBOR for the interest period relevant to such borrowing adjusted for certain additional costs or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus ½ of 1%, (2) the rate of interest for such day announced by Mizuho Bank, Ltd. as its prime rate and (3) the eurocurrency rate for an interest period of one month plus 1.00%, in each case plus an applicable margin. The applicable margin ranges between .79% and 1.275% for eurocurrency rate borrowings and 0.0% and .275% for base rate borrowings, depending on the Parent Company’s debt ratings as of the date of determination. In addition, the Parent Company and Aflac are required to pay a facility fee on the commitments ranging between .085% and .225%, also based on the Parent Company’s debt ratings as of the date of determination. Borrowings under the amended and restated credit facility may be used for general corporate purposes, including a capital contingency plan for the operations of the Parent Company and Aflac. The amended and restated credit facility requires compliance with certain financial covenants on a quarterly basis and will expire on the earlier of (a) September 18, 2020, or (b) the date the commitments are terminated pursuant to an event of default, as such term is defined in the credit agreement. As of March 31, 2017, we did not have any borrowings outstanding under our 55.0 billion yen revolving credit agreement.

The Parent Company and Aflac have an uncommitted bilateral line of credit with a third party that provides for borrowings in the amount of $50 million. Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period. There are no related facility fees, upfront expenses or financial covenant requirements. Borrowings under this credit agreement may be used for general corporate purposes. As of March 31, 2017, we did not have any borrowings outstanding under our $50 million credit agreement.

We were in compliance with all of the covenants of our notes payable and lines of credit at March 31, 2017. No events of default or defaults occurred during the three-month period ended March 31, 2017.

For additional information, see Notes 4 and 9 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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SHAREHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2017

Stockholders' Equity Note [Abstract]

SHAREHOLDERS' EQUITY

SHAREHOLDERS’ EQUITY

The following table is a reconciliation of the number of shares of the Company's common stock for the three-month periods ended March 31.

(In thousands of shares)	2017		2016
Common stock - issued:
Balance, beginning of period	671,249		669,723
Exercise of stock options and issuance of restricted shares	434		678
Balance, end of period	671,683		670,401
Treasury stock:
Balance, beginning of period	265,439		245,343
Purchases of treasury stock:
Open market	8,493		10,152
Other	144		189
Dispositions of treasury stock:
Shares issued to AFL Stock Plan	(247	)	(311	)
Exercise of stock options	(128	)	(64	)
Other	(20	)	(111	)
Balance, end of period	273,681		255,198
Shares outstanding, end of period	398,002		415,203

Outstanding share-based awards are excluded from the calculation of weighted-average shares used in the computation of basic earnings per share (EPS). The following table presents the approximate number of share-based awards to purchase shares, on a weighted-average basis, that were considered to be anti-dilutive and were excluded from the calculation of diluted earnings per share for the following periods.

	Three Months Ended March 31,
(In thousands)	2017		2016
Anti-dilutive share-based awards		321		2,682

Share Repurchase Program

During the first three months of 2017, we repurchased 8.5 million shares of our common stock in the open market for $600 million as part of our share repurchase program. During the first three months of 2016, we repurchased 10.2 million shares of our common stock in the open market for $600 million as part of our share repurchase program. As of March 31, 2017, a remaining balance of 18.3 million shares of our common stock was available for purchase under share repurchase authorizations by our board of directors.

Reclassifications from Accumulated Other Comprehensive Income

The tables below are reconciliations of accumulated other comprehensive income by component for the following periods.

Changes in Accumulated Other Comprehensive Income

Three Months Ended March 31, 2017
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(1,983	)		$	4,805			$	(24	)		$	(168	)		$	2,630
Other comprehensive income (loss) before reclassification		333				(341		)		2				(4		)		(10		)
Amounts reclassified from accumulated other comprehensive income (loss)		0				10				0				2				12
Net current-period other comprehensive income (loss)		333				(331		)		2				(2		)		2
Balance, end of period		$	(1,650	)		$	4,474			$	(22	)		$	(170	)		$	2,632

All amounts in the table above are net of tax.

Three Months Ended March 31, 2016
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(2,196	)		$	2,986			$	(26	)		$	(139	)		$	625
Other comprehensive income (loss) before reclassification		612				1,748				2				(1		)		2,361
Amounts reclassified from accumulated other comprehensive income (loss)		0				(50		)		0				0				(50		)
Net current-period other comprehensive income (loss)		612				1,698				2				(1		)		2,311
Balance, end of period		$	(1,584	)		$	4,684			$	(24	)		$	(140	)		$	2,936

All amounts in the table above are net of tax.

The tables below summarize the amounts reclassified from each component of accumulated other comprehensive income based on source for the following periods.

Reclassifications Out of Accumulated Other Comprehensive Income

(In millions)	Three Months Ended March 31, 2017
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	(6	)	Sales and redemptions
		(10		)	Other-than-temporary impairment losses realized
		(16		)	Total before tax
		6			Tax (expense) or benefit(1)
		$	(10	)	Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		0			Acquisition and operating expenses(2)
		1			Tax (expense) or benefit(1)
		$	(2	)	Net of tax
Total reclassifications for the period		$	(12	)	Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

(In millions)	Three Months Ended March 31, 2016
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	91		Sales and redemptions
		(14		)	Other-than-temporary impairment losses realized
		77			Total before tax
		(27		)	Tax (expense) or benefit(1)
		$	50		Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		3			Acquisition and operating expenses(2)
		0			Tax (expense) or benefit(1)
		$	0		Net of tax
Total reclassifications for the period		$	50		Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

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SHARE-BASED COMPENSATION

3 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION

As of March 31, 2017, the Company has outstanding share-based awards under the Aflac Incorporated 2004 Long-Term Incentive Plan (as Amended and Restated March 14, 2012) (the “2004 Plan”). Share-based awards are designed to reward employees for their long-term contributions to the Company and provide incentives for them to remain with the Company. The number and frequency of share-based awards are based on competitive practices, operating results of the Company, government regulations, and other factors.

The 2004 Plan, as amended on March 14, 2012, allows for a maximum number of shares issuable over its term of 25 million shares including 12 million shares that may be awarded in respect of awards other than options or stock appreciation rights. If any awards granted under the 2004 Plan are forfeited or are terminated before being exercised or settled for any reason other than tax forfeiture, then the shares underlying the awards will again be available under the 2004 Plan.

The 2004 Plan allows awards to Company employees for incentive stock options (ISOs), non-qualifying stock options (NQSOs), restricted stock, restricted stock units, and stock appreciation rights. Non-employee directors are eligible for grants of NQSOs, restricted stock, and stock appreciation rights. As of March 31, 2017, approximately 8.0 million shares were available for future grants under this plan. The ISOs and NQSOs have a term of 10 years, and the share-based awards generally vest upon time-based conditions or time and performance-based conditions. Time-based vesting generally occurs after three years. Performance-based vesting conditions generally include the attainment of goals related to Company financial performance. As of March 31, 2017, the only performance-based awards issued and outstanding were restricted stock awards.

Stock options and stock appreciation rights granted under the amended 2004 Plan have an exercise price of at least 100% of the fair market value of the underlying stock on the grant date and have an expiration date no later than 10 years from the grant date. Time-based restricted stock awards, restricted stock units and stock options granted after January 1, 2017 vest on a ratable basis over three years, and awards granted prior to the amendment vest on a three-year cliff basis. The Compensation Committee of the Board of Directors has the discretion to determine vesting schedules.

Share-based awards granted to U.S.-based grantees are settled with authorized but unissued Company stock, while those issued to Japan-based grantees are settled with treasury shares.

The following table provides information on stock options outstanding and exercisable at March 31, 2017.

	Stock Option Shares (in thousands)		Weighted-Average Remaining Term (in years)		Aggregate Intrinsic Value (in millions)			Weighted-Average Exercise Price Per Share
Outstanding		6,245		4.9		$	119		$	53.38
Exercisable		4,504		3.4		102			49.72

We received cash from the exercise of stock options in the amount of $17 million during the first three months of 2017, compared with $10 million in the first three months of 2016. The tax benefit realized as a result of stock option exercises and restricted stock releases was $14 million in the first three months of 2017, compared with $13 million in the first three months of 2016.

As of March 31, 2017, total compensation cost not yet recognized in our financial statements related to restricted stock awards was $62 million, of which $29 million (973 thousand shares) was related to restricted stock awards with a performance-based vesting condition. We expect to recognize these amounts over a weighted-average period of approximately 1.7 years. There are no other contractual terms covering restricted stock awards once vested.

The following table summarizes restricted stock activity during the three-month period ended March 31.

(In thousands of shares)	Shares		Weighted-Average Grant-Date Fair Value Per Share
Restricted stock at December 31, 2016	1,868			$	61.76
Granted in 2017	489			71.97
Canceled in 2017	(4	)		65.05
Vested in 2017	(437	)		62.23
Restricted stock at March 31, 2017	1,916			$	64.12

In February 2017, the Company granted 253 thousand performance-based stock awards, which are contingent on the achievement of the Company's financial performance metrics and its market-based conditions. On the date of grant, the Company estimated the fair value of restricted stock awards with market-based conditions using a Monte Carlo simulation model. The model discounts the value of the stock at the assumed vesting date based on the risk-free interest rate. Based on estimates of actual performance versus the vesting thresholds, the calculated fair value percentage pay-out estimate will be updated each quarter.

The Company uses third-party analyses to assist in developing the assumptions used in, as well as calibrating, a Monte Carlo simulation model. The Company is responsible for determining the assumptions used in estimating the fair value of its share-based payment awards.

On January 1, 2017, we adopted accounting guidance related to employee share-based payment accounting, which requires an entity to elect whether to use estimates of forfeitures, or to account for forfeitures as they occur, using modified retrospective application. We have made an entity-wide accounting policy election to estimate the number of awards that are expected to vest (consistent with our prior policy). The election and adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

For additional information on our long-term share-based compensation plans and the types of share-based awards, see Note 12 of the Notes to the Consolidated Financial Statements included in the 2016 Annual Report.

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BENEFIT PLANS

3 Months Ended

Mar. 31, 2017

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

BENEFIT PLANS

BENEFIT PLANS

We have funded defined benefit plans in Japan and the United States, however the U.S. plan was frozen to new participants effective October 1, 2013. We also maintain non-qualified, unfunded supplemental retirement plans that provide defined pension benefits in excess of limits imposed by federal tax law for certain Japanese, U.S. and former employees, however the U.S. plan was frozen to new participants effective January 1, 2015. U.S. employees who are not participants in the defined benefit plan receive a nonelective 401(k) employer contribution.

We provide certain health care benefits for eligible U.S. retired employees, their beneficiaries and covered dependents ("other postretirement benefits"). The health care plan is contributory and unfunded. Effective January 1, 2014, employees eligible for benefits included the following: (1) active employees whose age plus service, in years, equaled or exceeded 80 (rule of 80); (2) active employees who were age 55 or older and have met the 15 years of service requirement; (3) active employees who would meet the rule of 80 in the next five years; (4) active employees who were age 55 or older and who would meet the 15 years of service requirement within the next five years; and (5) current retirees. For certain employees and former employees, additional coverage is provided for all medical expenses for life.

Pension and other postretirement benefit expenses, included in acquisition and operating expenses in the consolidated statement of earnings, included the following components:

	Three Months Ended March 31,
	Pension Benefits																Other
	Japan								U.S.								Postretirement Benefits
(In millions)	2017				2016				2017				2016				2017			2016
Components of net periodic benefit cost:
Service cost		$	5			$	4			$	6			$	6			$	0		$	0
Interest cost		1				2				8				8				0			0
Expected return on plan assets		(1		)		(1		)		(6		)		(6		)		0			0
Amortization of net actuarial loss		0				0				3				3				0			0
Amortization of prior service cost (credit)		0				0				0				0				0			(3		)
Net periodic (benefit) cost		$	5			$	5			$	11			$	11			$	0		$	(3	)

During the three months ended March 31, 2017, Aflac Japan contributed approximately $6 million (using the weighted-average yen/dollar exchange rate for the three-month period ending March 31, 2017) to the Japanese funded defined benefit plan, and Aflac U.S. did not make a contribution to the U.S. funded defined benefit plan.

For additional information regarding our Japanese and U.S. benefit plans, see Note 14 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report.

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COMMITMENTS AND CONTINGENT LIABILITIES

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENT LIABILITIES

COMMITMENTS AND CONTINGENT LIABILITIES

We are a defendant in various lawsuits considered to be in the normal course of business. Members of our senior legal and financial management teams review litigation on a quarterly and annual basis. The final results of any litigation cannot be predicted with certainty. Although some of this litigation is pending in states where large punitive damages, bearing little relation to the actual damages sustained by plaintiffs, have been awarded in recent years, we believe the outcome of pending litigation will not have a material adverse effect on our financial position, results of operations, or cash flows.

See Note 3 of the Notes to the Consolidated Financial Statements for details on investment commitments.

Guaranty Fund Assessments

The United States insurance industry has a policyholder protection system that is monitored and regulated by state insurance departments. These life and health insurance guaranty associations are state entities (in all 50 states as well as Puerto Rico and the District of Columbia) created to protect policyholders of an insolvent insurance company. All insurance companies (with limited exceptions) licensed to sell life or health insurance in a state must be members of that state’s guaranty association. Under state guaranty association laws, certain insurance companies can be assessed (up to prescribed limits) for certain obligations to the policyholders and claimants of impaired or insolvent insurance companies that write the same line or similar lines of business.

In 2009, the Pennsylvania Insurance Commissioner placed long-term care insurer Penn Treaty Network America Insurance Company and its subsidiary American Network Insurance Company (collectively referred to as Penn Treaty), neither of which is affiliated with Aflac, in rehabilitation and petitioned a state court for approval to liquidate Penn Treaty. A final order of liquidation was granted by a recognized judicial authority on March 1, 2017, and as a result, Penn Treaty is in the process of liquidation. We have estimated and recognized the impact of our share of guaranty fund assessments resulting from the liquidation using a discounted rate of 4.25%. We have recognized a discounted liability for the assessments of $62 million (undiscounted $94 million), offset by discounted premium tax credits of $48 million (undiscounted $74 million), for a net $14 million impact to net income as of March 31, 2017. We expect a majority of these assessments to be paid over the next year and a majority of the tax credits to be realized over the next five years. We use the most current cost estimate provided by the National Organization of Life and Health Guaranty Associations (NOLHGA) to calculate our estimated assessments and tax credits. To the extent Medicare part D related premiums are included in the industry premiums within the latest NOLHGA annual report, our assessments estimate will increase. Since this information is not available at this time, we cannot at this time estimate the extent of the increase, if any.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business and Basis of Presentation

Description of Business

Aflac Incorporated (the Parent Company) and its subsidiaries (collectively, the Company) primarily sell supplemental health and life insurance in the United States and Japan. The Company's insurance business is marketed and administered through American Family Life Assurance Company of Columbus (Aflac), which operates in the United States (Aflac U.S.) and as a branch in Japan (Aflac Japan). American Family Life Assurance Company of New York (Aflac New York) is a wholly owned subsidiary of Aflac. Most of Aflac's policies are individually underwritten and marketed through independent agents. Additionally, Aflac U.S. markets and administers group products through Continental American Insurance Company (CAIC), branded as Aflac Group Insurance. Our insurance operations in the United States and our branch in Japan service the two markets for our insurance business. Aflac Japan's revenues, including realized gains and losses on its investment portfolio, accounted for 69% and 74% of the Company's total revenues in the three-month periods ended March 31, 2017, and 2016, respectively. The percentage of the Company's total assets attributable to Aflac Japan was 84% at March 31, 2017, compared with 83% at December 31, 2016.

Basis of Presentation

We prepare our financial statements in accordance with U.S. generally accepted accounting principles (GAAP). These principles are established primarily by the Financial Accounting Standards Board (FASB). In these Notes to the Consolidated Financial Statements, references to U.S. GAAP issued by the FASB are derived from the FASB Accounting Standards Codification^TM (ASC). The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates when recording transactions resulting from business operations based on currently available information. The most significant items on our balance sheet that involve a greater degree of accounting estimates and actuarial determinations subject to changes in the future are the valuation of investments and derivatives, deferred policy acquisition costs, liabilities for future policy benefits and unpaid policy claims, and income taxes. These accounting estimates and actuarial determinations are sensitive to market conditions, investment yields, mortality, morbidity, commission and other acquisition expenses, and terminations by policyholders. As additional information becomes available, or actual amounts are determinable, the recorded estimates will be revised and reflected in operating results. Although some variability is inherent in these estimates, we believe the amounts provided are adequate.

The unaudited consolidated financial statements include the accounts of the Parent Company, its subsidiaries and those entities required to be consolidated under applicable accounting standards. All material intercompany accounts and transactions have been eliminated.

In the opinion of management, the accompanying unaudited consolidated financial statements of the Company contain all adjustments, consisting of normal recurring accruals, which are necessary to fairly present the consolidated balance sheets as of March 31, 2017 and December 31, 2016, the consolidated statements of earnings and comprehensive income (loss), shareholders' equity and cash flows for the three-month periods ended March 31, 2017 and 2016. Results of operations for interim periods are not necessarily indicative of results for the entire year. As a result, these financial statements should be read in conjunction with the financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2016 (2016 Annual Report).

Reclassifications

Reclassifications: Certain reclassifications have been made to prior-year amounts to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity.

Prior year foreign currency transaction gains and losses have been reclassified from Other income (loss) to Realized investment gains (losses) - Derivative and other gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on net earnings or total shareholders' equity. This change in classification was made to reflect that the major source of our foreign currency transaction gains and losses is directly or indirectly a result of our investment activity.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Consolidation - Interests Held through Related Parties That Are under Common Control: In October 2016, the FASB issued amendments which clarify the consolidation guidance on how a reporting entity that is the single decision maker of a variable interest entity (VIE) should treat indirect interests in the entity held through related parties that are under common control with the reporting entity when determining whether it is the primary beneficiary of that VIE. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting: In March 2016, the FASB issued amendments which simplify several aspects for share-based payment award transactions, including income tax consequences, classification of awards as either liability or equities, and classification on the statement of cash flows. We adopted this guidance as of January 1, 2017.

The amendment requires prospective recognition of excess tax benefits and deficiencies in the income statement, rather than in paid-in capital. As a result of applying this requirement, we believe that recognition of excess tax benefits will increase volatility in our statement of operations but the adoption of this guidance did not have a significant impact on our statement of financial position, operations, or disclosures. 

The amendment also requires all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) to be recognized as income tax expense or benefit in the income statement. The guidance requires modified retrospective transition for settlements on all outstanding awards (both historical and future) that did not give rise to an excess benefit to be recorded through retained earnings on a cumulative-effect basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Additionally, the amendment requires that the minimum statutory tax withholding for all outstanding liability awards be reclassified at the date of adoption to equity (assuming equity classification results from the guidance change), and as a cumulative-effect adjustment to equity be recorded on a modified retrospective basis. The adoption of these amendments in the guidance did not have a significant impact on our financial position, results of operations, or disclosures.

The guidance requires certain reclassifications of balances on the statement of cash flows to or from operating and financing activities. The reclassification guidance did not have a significant impact on our statement of cash flows.

The amendment allows an entity to elect whether to use estimates of forfeitures, or to account for forfeitures as they occur, using modified retrospective application. We have made an entity-wide accounting policy election to estimate the number of awards that are expected to vest (consistent with our prior policy). The election and adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Investments - Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting: In March 2016, the FASB issued amendments whicheliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. Per the amendments, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments also require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Contingent Put and Call Options in Debt Instruments: In March 2016, the FASB issued amendments which clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is related to interest rates or credit risks. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Derivatives and Hedging - Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships: In March 2016, the FASB issued amendments which clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria remain intact. We adopted this guidance as of January 1, 2017. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures.

Financial Services - Insurance - Disclosures about Short-Duration Contracts:In May 2015, the FASB issued updated guidance requiring enhanced disclosures by all insurance entities that issue short-duration contracts. The amendments require insurance entities to disclose for annual reporting periods information about the liability for unpaid claims and claim adjustment expenses. The amendments also require insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate the liability for unpaid claims and claim adjustment expenses. In addition, the amendments require insurance entities to disclose for annual and interim reporting periods a roll-forward of the liability for unpaid claims and claim adjustment expenses. For health insurance claims, the amendments require the disclosure of the total of incurred-but-not-reported liabilities and expected development on reported claims included in the liability for unpaid claims and claim adjustment expenses. We adopted this guidance as of December 31, 2016, and have no insurance contracts classified as short-duration. The adoption of this guidance did not have a significant impact on our disclosures.

Presentation of Financial Statements - Going Concern - Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern:In August 2014, the FASB issued this amendment that provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. The new guidance requires a formal assessment of going concern by management based on criteria prescribed in the new guidance. We adopted this guidance as of December 31, 2016. The adoption of this guidance did not have a significant impact on our financial position, results of operations, or disclosures, and no substantial doubt currently exists about the Company’s ability to continue as a going concern.

Description of Accounting Pronouncements Pending Adoption

Accounting Pronouncements Pending Adoption

Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued amendments to shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount. The amendments are effective for public business entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, or disclosures.

Compensation-Retirement Benefit: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost: In March 2017, the FASB issued amendments requiring that an employer report the service cost component of net periodic pension cost and net periodic postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic pension cost and net periodic postretirement benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments in this update also allow only the service cost component to be eligible for capitalization when applicable. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets: In February 2017, the FASB issued amendments clarifying that the accounting guidance for derecognition of nonfinancial assets does not apply to the derecognition of businesses, nonprofit activities or financial assets that meet the definition of "in substance nonfinancial assets." The new guidance defines an "in substance nonfinancial asset" to be an asset or group of assets for which substantially all of the fair value consists of nonfinancial assets and the group or subsidiary is not a business. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Earlier adoption is permitted for fiscal years beginning after December 15, 2016, including interim periods therein. An entity is required to apply the amendments at the same time that it applies the FASB amendments for Revenue from Contracts with Customers. We are evaluating the impact of adoption of this guidance on our financial position, results of operations, disclosures, and statements of cash flows.

Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment: In January 2017, the FASB issued amendments simplifying the subsequent measurement of goodwill. An entity, under this update, is no longer required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, the entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The amendments are effective for public business entities that are U.S. SEC filers for annual or any interim goodwill impairment tests in fiscal years beginning after Dec. 15, 2019. Early adoption is permitted for any goodwill impairment tests performed on testing dates after January 1, 2017. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Business Combinations - Clarifying the Definition of a Business: In January 2017, the FASB issued amendments clarifying when a set of assets and activities is a business. The amendments provide a screen to determine when a set of assets and activities is not a business. The amendments are effective for public business entities beginning after December 15, 2017, including interim periods within those periods. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, or disclosures.

Statement of Cash Flows - Restricted Cash: In November 2016, the FASB issued amendments requiring that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this guidance to have a significant impact on our financial position, results of operations, disclosures or statement of cash flows.

Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory: In October 2016, the FASB issued amendments that require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments are effective for public business entities for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted. We are evaluating the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments: In August 2016, the FASB issued amendments that provide guidance on eight specific statement of cash flows classification issues. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted for any interim or annual period. The adoption of this guidance is not expected to have a significant impact on our financial position, results of operations, disclosures, or statements of cash flows.

Financial Instruments - Credit Losses - Measurement of Credit Losses on Financial Instruments: In June 2016, the FASB issued amendments that require a financial asset (or a group of financial assets) measured on an amortized cost basis to be presented net of an allowance for credit losses in order to reflect the amount expected to be collected on the financial asset(s). The measurement of expected credit losses is amended by replacing the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform about a credit loss. Credit losses on available-for-sale debt securities will continue to be measured in a manner similar to current U.S. GAAP. However, the amendments require that credit losses be presented as an allowance rather than as a writedown. Other amendments include changes to the balance sheet presentation and interest income recognition of purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. The amendments are effective for public companies for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Companies may early adopt this guidance as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, loans and loan receivables and reinsurance recoverables (See Notes 3 and 7 for current balances of instruments in scope). We are continuing to evaluate the impact of adoption of this guidance on our financial position, results of operations and disclosures.

Leases: In February 2016, the FASB issued updated guidance for accounting for leases. Per the amendments, lessees will be required to recognize all leases on the balance sheet, with the exception of short-term leases. A lease liability will be recorded for the obligation of a lessee to make lease payments arising from a lease. A right-of-use asset, will be recorded which represents the lessee’s right to use, or to control the use of, a specified asset for a lease term. Under the new guidance, lessor accounting is largely unchanged. The amendments are effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We have identified certain operating leases in scope of this guidance to include office space and equipment leases (See Note 15 of the Notes to the Consolidated Financial Statements in the 2016 Annual Report for current balances of leases in scope). The leases within scope of this guidance will increase our right-of-use assets recorded on our financial position, however we estimate leases within scope of the guidance to represent less than 1% of our total assets as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

Financial Instruments - Overall - Recognition and Measurement of Financial Assets and Financial Liabilities: In January 2016, the FASB issued guidance to address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The main provisions require that equity investments be measured at fair value with changes recognized in net income; that changes in instrument-specific credit risk for financial liabilities that are measured under the fair value option be recognized in other comprehensive income; and that entities would make the assessment of the ability to realize a deferred tax asset (DTA) related to an available-for-sale (AFS) debt security in combination with the entity's other DTAs. The amendments are effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is not permitted, with the exception of the own credit provision if an entity has elected to measure a liability at fair value. We have identified certain financial instruments in scope of this guidance to include certain fixed maturity securities, perpetual securities and equity securities (See Note 3 for current balances of instruments in scope). We estimate that the impact of this guidance will increase volatility in our statement of operations and we are continuing to evaluate the impact of this guidance on our statement of financial position, operations and disclosures.

Revenue from Contracts with Customers: In May 2014, the FASB issued updated guidance that affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g., insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB deferred the effective date for this standard to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods. We have identified revenue in scope of this guidance to include certain revenues associated with affiliated entities in support of our operations. We estimate the revenue within scope of the guidance to represent less than 1% of our total revenues as of March 31, 2017. We estimate that the adoption of this guidance will not have a significant impact on our financial position, results of operations and disclosures.

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BUSINESS SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

	Three Months Ended March 31,
(In millions)	2017			2016
Revenues:
Aflac Japan:
Net earned premiums	$	3,194		$	3,179
Net investment income, less amortized hedge costs (1)	557			590
Other income	10			8
Total Aflac Japan	3,761			3,777
Aflac U.S.:
Net earned premiums	1,390			1,367
Net investment income	178			174
Other income	1			3
Total Aflac U.S.	1,569			1,544
Other business segments	67			65
Total business segment revenues	5,397			5,386
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Corporate	87			67
Intercompany eliminations and other	(66		)	(42		)
Total revenues	$	5,309		$	5,451

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total revenues.

Reconciliation of Operating Profit (Loss) from Segments to Consolidated

	Three Months Ended March 31,
(In millions)	2017			2016
Pretax earnings:
Aflac Japan (1)	$	769		$	806
Aflac U.S.	310			332
Other business segments	0			3
Total business segment pretax operating earnings	1,079			1,141
Interest expense, noninsurance operations	(29		)	(29		)
Corporate and eliminations	(23		)	(35		)
Pretax operating earnings	1,027			1,077
Realized investment gains (losses) (1), (2), (3)	(109		)	40
Other non-operating income (loss) (3)	(20		)	0
Total earnings before income taxes	$	898		$	1,117
Income taxes applicable to pretax operating earnings	$	351		$	372
Effect of foreign currency translation on after-tax operating earnings	5			13

⁽¹⁾ Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from pretax operating earnings when analyzing segment operations to conform to current year reporting.

⁽²⁾ Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

⁽³⁾Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total earnings before income taxes.

Reconciliation of Assets from Segment to Consolidated

Assets were as follows:

(In millions)	March 31, 2017				December 31, 2016
Assets:
Aflac Japan		$	112,023			$	107,858
Aflac U.S.		19,817				19,453
Other business segments		338				270
Total business segment assets		132,178				127,581
Corporate		26,024				26,476
Intercompany eliminations		(24,552		)		(24,238		)
Total assets		$	133,650			$	129,819

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INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2017

Available-for-sale Securities

The amortized cost for our investments in debt and perpetual securities, the cost for equity securities and the fair values of these investments are shown in the following tables.

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	26,311		$	3,203		$	366		$	29,148
Municipalities		281			26			12			295
Mortgage- and asset-backed securities		272			32			0			304
Public utilities		1,637			324			6			1,955
Sovereign and supranational		846			133			6			973
Banks/financial institutions		3,039			414			83			3,370
Other corporate		3,429			596			16			4,009
Total yen-denominated		35,815			4,728			489			40,054
U.S. dollar-denominated:
U.S. government and agencies		161			11			0			172
Municipalities		901			133			7			1,027
Mortgage- and asset-backed securities		184			16			0			200
Public utilities		5,296			669			77			5,888
Sovereign and supranational		326			87			0			413
Banks/financial institutions		2,680			513			18			3,175
Other corporate		24,898			1,972			722			26,148
Total U.S. dollar-denominated		34,446			3,401			824			37,023
Total fixed maturities		70,261			8,129			1,313			77,077
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,315			208			50			1,473
Other corporate		196			23			0			219
U.S. dollar-denominated:
Banks/financial institutions		52			26			0			78
Total perpetual securities		1,563			257			50			1,770
Equity securities:
Yen-denominated		668			63			10			721
U.S. dollar-denominated		584			55			11			628
Total equity securities		1,252			118			21			1,349
Total securities available for sale		$	73,076		$	8,504		$	1,384		$	80,196

	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities available for sale, carried at fair value:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	22,857		$	3,359		$	160		$	26,056
Municipalities		246			29			8			267
Mortgage- and asset-backed securities		1,096			33			8			1,121
Public utilities		1,533			318			3			1,848
Sovereign and supranational		862			186			5			1,043
Banks/financial institutions		2,673			403			74			3,002
Other corporate		3,192			623			3			3,812
Total yen-denominated		32,459			4,951			261			37,149
U.S dollar-denominated:
U.S. government and agencies		148			10			0			158
Municipalities		894			142			8			1,028
Mortgage- and asset-backed securities		196			20			0			216
Public utilities		5,205			690			60			5,835
Sovereign and supranational		335			91			0			426
Banks/financial institutions		2,570			507			16			3,061
Other corporate		24,556			2,021			690			25,887
Total U.S. dollar-denominated		33,904			3,481			774			36,611
Total fixed maturities		66,363			8,432			1,035			73,760
Perpetual securities:
Yen-denominated:
Banks/financial institutions		1,266			128			49			1,345
Other corporate		189			24			0			213
U.S. dollar-denominated:
Banks/financial institutions		51			24			0			75
Total perpetual securities		1,506			176			49			1,633
Equity securities:
Yen-denominated		624			83			2			705
U.S. dollar-denominated		579			31			6			604
Total equity securities		1,203			114			8			1,309
Total securities available for sale		$	69,072		$	8,722		$	1,092		$	76,702

Held-to-maturity Securities

	March 31, 2017
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair   Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	21,493		$	5,114		$	0		$	26,607
Municipalities		363			104			0			467
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,324			376			7			3,693
Sovereign and supranational		2,702			307			0			3,009
Banks/financial institutions		3,650			204			24			3,830
Other corporate		2,839			446			0			3,285
Total yen-denominated		34,401			6,553			31			40,923
Total securities held to maturity		$	34,401		$	6,553		$	31		$	40,923

	December 31, 2016
(In millions)	Cost or Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Yen-denominated:
Japan government and agencies		$	20,702		$	5,338		$	0		$	26,040
Municipalities		350			107			0			457
Mortgage- and asset-backed securities		30			2			0			32
Public utilities		3,201			358			23			3,536
Sovereign and supranational		2,602			283			8			2,877
Banks/financial institutions		3,731			195			26			3,900
Other corporate		2,734			452			7			3,179
Total yen-denominated		33,350			6,735			64			40,021
Total securities held to maturity		$	33,350		$	6,735		$	64		$	40,021

Investments Classified by Contractual Maturity Date

The contractual maturities of our investments in fixed maturities at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Available for sale:
Due in one year or less		$	145		$	161		$	74		$	77
Due after one year through five years		3,561			3,788			664			716
Due after five years through 10 years		9,846			10,093			3,128			3,324
Due after 10 years		43,392			48,447			8,462			9,421
Mortgage- and asset-backed securities		316			361			43			47
Total fixed maturities available for sale		$	57,260		$	62,850		$	12,371		$	13,585
Held to maturity:
Due after one year through five years		$	2,086		$	2,193		$	0		$	0
Due after five years through 10 years		1,645			1,813			0			0
Due after 10 years		30,640			36,884			0			0
Mortgage- and asset-backed securities		30			33			0			0
Total fixed maturities held to maturity		$	34,401		$	40,923		$	0		$	0

Economic Maturities of Investments in Perpetual Securities

The economic maturities of our investments in perpetual securities, which were all reported as available for sale at March 31, 2017, were as follows:

	Aflac Japan						Aflac U.S.
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair   Value
Due in one year or less		$	90		$	87		$	0		$	0
Due after one year through five years		196			219			0			0
Due after 10 years		1,238			1,407			39			57
Total perpetual securities available for sale		$	1,524		$	1,713		$	39		$	57

Investment Exposures Exceeding Ten Percent Shareholders Equity

Investment exposures that individually exceeded 10% of shareholders' equity were as follows:

	March 31, 2017			December 31, 2016
(In millions)	Credit Rating	Amortized Cost	Fair Value	Credit Rating	Amortized Cost	Fair Value
Japan National Government(1)	A	$47,131	$54,971	A	$42,931	$51,345

⁽¹⁾Japan Government Bonds (JGBs) or JGB-backed securities

Gain (Loss) on Investments

Information regarding pretax realized gains and losses from investments is as follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Realized investment gains (losses):
Fixed maturities:
Available for sale:
Gross gains from sales	$	12		$	2
Gross losses from sales(1)	(15		)	(4		)
Net gains (losses) from redemptions(1)	(29		)	83
Other-than-temporary impairment losses(1)	(4		)	(12		)
Total fixed maturities	(36		)	69
Perpetual securities:
Available for sale:
Net gains (losses) from redemptions	0			10			(1)
Other-than-temporary impairment losses	0			(2		)	(1)
Total perpetual securities	0			8
Equity securities:
Net gains (losses) from redemptions	25			0
Other-than-temporary impairment losses	(6		)	0
Total equity securities	19			0
Derivatives and other:
Derivative gains (losses)	(52		)	(4		)
Foreign currency gains (losses)	(71		)	(43		)
Total derivatives and other	(123		)	(47		)
Total realized investment gains (losses)	$	(140	)	$	30

Net Effect on Shareholders' Equity of Unrealized Gains and Losses from Investment Securities

The net effect on shareholders’ equity of unrealized gains and losses from investment securities was as follows:

(In millions)	March 31, 2017				December 31, 2016
Unrealized gains (losses) on securities available for sale		$	7,120			$	7,630
Deferred income taxes		(2,646		)		(2,825		)
Shareholders’ equity, unrealized gains (losses) on investment securities		$	4,474			$	4,805

Investments Gross Unrealized Loss Aging

The following tables show the fair values and gross unrealized losses of our available-for-sale and held-to-maturity investments that were in an unrealized loss position, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position.

	March 31, 2017
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	5,940		$	366		$	5,940		$	366		$	0		$	0
Municipalities:
U.S. dollar-denominated		45			7			0			0			45			7
Yen-denominated		132			12			132			12			0			0
Public utilities:
U.S. dollar-denominated		1,642			77			1,124			37			518			40
Yen-denominated		325			13			127			6			198			7
Sovereign and supranational:
Yen-denominated		39			6			39			6			0			0
Banks/financial institutions:
U.S. dollar-denominated		390			18			309			6			81			12
Yen-denominated		1,531			107			646			34			885			73
Other corporate:
U.S. dollar-denominated		10,690			722			7,046			272			3,644			450
Yen-denominated		415			16			415			16			0			0
Total fixed maturities		21,149			1,344			15,778			755			5,371			589
Perpetual securities:
Yen-denominated		409			50			0			0			409			50
Total perpetual securities		409			50			0			0			409			50
Equity securities:
U.S. dollar-denominated		131			11			117			8			14			3
Yen-denominated		208			10			172			5			36			5
Total equity securities		339			21			289			13			50			8
Total		$	21,897		$	1,415		$	16,067		$	768		$	5,830		$	647

	December 31, 2016
	Total						Less than 12 months						12 months or longer
(In millions)	Fair Value			Unrealized Losses			Fair Value			Unrealized Losses			Fair Value			Unrealized Losses
Fixed Maturities:
Japan government and agencies:
Yen-denominated		$	3,958		$	160		$	3,958		$	160		$	0		$	0
Municipalities:
U.S. dollar-denominated		44			8			0			0			44			8
Yen-denominated		105			8			105			8			0			0
Mortgage- and asset- backed securities:
Yen-denominated		713			8			713			8			0			0
Public utilities:
U.S. dollar-denominated		1,265			60			790			32			475			28
Yen-denominated		635			26			347			14			288			12
Sovereign and supranational:
Yen-denominated		244			13			38			5			206			8
Banks/financial institutions:
U.S. dollar-denominated		268			16			238			10			30			6
Yen-denominated		1,521			100			636			19			885			81
Other corporate:
U.S. dollar-denominated		10,462			690			7,252			346			3,210			344
Yen-denominated		321			10			321			10			0			0
Total fixed maturities		19,536			1,099			14,398			612			5,138			487
Perpetual securities:
Yen-denominated		479			49			85			1			394			48
Total perpetual securities		479			49			85			1			394			48
Equity securities:
U.S. dollar-denominated		211			6			211			6			0			0
Yen-denominated		49			2			49			2			0			0
Total equity securities		260			8			260			8			0			0
Total		$	20,275		$	1,156		$	14,743		$	621		$	5,532		$	535

Other Investments

The table below reflects the composition of the carrying value for other investments as of the periods presented.

(In millions)	March 31, 2017			December 31, 2016
Other investments:
Commercial mortgage loans		$	870		$	855
Middle market loans		439			319
Short-term investments		141			89
Policy loans		197			184
Other		54			3
Total other investments		$	1,701		$	1,450

Securities Lending Transactions Accounted for as Secured Borrowings

Details of our securities lending activities were as follows:

Securities Lending Transactions Accounted for as Secured Borrowings
March 31, 2017
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Japan government and agencies	$	0	$	885	$	885
Public utilities	87		0		87
Banks/financial institutions	38		0		38
Other corporate	472		0		472
Total borrowings	$	597	$	885	$	1,482
Gross amount of recognized liabilities for securities lending transactions					$	1,482
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

Securities Lending Transactions Accounted for as Secured Borrowings
December 31, 2016
Remaining Contractual Maturity of the Agreements
(In millions)	Overnight and Continuous(1)		Up to 30 days		Total
Securities lending transactions:
Public utilities	$	62	$	0	$	62
Banks/financial institutions	34		0		34
Other corporate	430		0		430
Total borrowings	$	526	$	0	$	526
Gross amount of recognized liabilities for securities lending transactions					$	526
Amounts related to agreements not included in offsetting disclosure in Note 4					$	0

⁽¹⁾ These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

Variable Interest Entity, Consolidated

Investments in Variable Interest Entities

VIEs - Consolidated

The following table presents the cost or amortized cost, fair value and balance sheet caption in which the assets and liabilities of consolidated VIEs are reported.

Investments in Consolidated Variable Interest Entities

	March 31, 2017						December 31, 2016
(In millions)	Cost or Amortized Cost			Fair Value			Cost or Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,143		$	4,964		$	4,168		$	4,982
Perpetual securities, available for sale		246			215			237			208
Equity securities		1,013			1,078			972			1,044
Other investments (1)		926			906			819			789
Other assets (2)		146			146			127			127
Total assets of consolidated VIEs		$	6,474		$	7,309		$	6,323		$	7,150
Liabilities:
Other liabilities (2)		$	125		$	125		$	146		$	146
Total liabilities of consolidated VIEs		$	125		$	125		$	146		$	146

Variable Interest Entity, Not Consolidated

Investments in Variable Interest Entities

VIEs-Not Consolidated

The table below reflects the amortized cost, fair value and balance sheet caption in which our investment in VIEs not consolidated are reported.

Investments in Variable Interest Entities Not Consolidated

	March 31, 2017						December 31, 2016
(In millions)	Amortized Cost			Fair Value			Amortized Cost			Fair Value
Assets:
Fixed maturities, available for sale		$	4,823		$	5,354		$	4,729		$	5,261
Perpetual securities, available for sale		178			230			172			200
Fixed maturities, held to maturity		2,660			3,039			2,563			2,948
Other investments		52			52			1			1
Total investments in VIEs not consolidated		$	7,713		$	8,675		$	7,465		$	8,410

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DERIVATIVE INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

		March 31, 2017										December 31, 2016
(In millions)				Asset Derivatives			Liability Derivatives							Asset Derivatives			Liability Derivatives
Hedge Designation/ Derivative Type	Notional Amount			Fair Value			Fair Value				Notional Amount			Fair Value			Fair Value
Cash flow hedges:
Foreign currency swaps		$	75		$	0		$	(6	)		$	75		$	0		$	(10	)
Total cash flow hedges		75			0			(6		)		75			0			(10		)
Fair value hedges:
Foreign currency forwards		9,705			10			(428		)		10,965			0			(759		)
Foreign currency options		5,560			5			(4		)		4,224			2			(32		)
Total fair value hedges		15,265			15			(432		)		15,189			2			(791		)
Net investment hedge:
Foreign currency forwards		236			0			(4		)		209			5			(2		)
Foreign currency options		924			20			(18		)		843			41			(17		)
Total net investment hedge		1,160			20			(22		)		1,052			46			(19		)
Non-qualifying strategies:
Foreign currency swaps		5,890			318			(218		)		6,266			490			(220		)
Foreign currency forwards		11,972			225			(421		)		21,218			667			(956		)
Foreign currency options		0			0			0				41			0			(2		)
Credit default swaps		89			2			0				86			2			0
Total non-qualifying strategies		17,951			545			(639		)		27,611			1,159			(1,178		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)
Balance Sheet Location
Other assets		$	14,115		$	580		$	0			$	18,329		$	1,207		$	0
Other liabilities		20,336			0			(1,099		)		25,598			0			(1,998		)
Total derivatives		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following table presents the gains and losses on derivatives and the related hedged items in fair value hedges.

Fair Value Hedging Relationships

(In millions)		Hedging Derivatives								Hedged Items
Hedging Derivatives	Hedged Items	Total Gains (Losses)			Gains (Losses) Excluded from Effectiveness Testing			Gains (Losses) Included in Effectiveness Testing		Gains (Losses)			Ineffectiveness Recognized for Fair Value Hedge
Three Months Ended March 31, 2017:
Foreign currency forwards	Fixed-maturity and equity securities	$	341		$	(48	)	$	389	$	(372	)	$	17
Foreign currency options	Fixed-maturity securities	24			13			11		(10		)	1
Three Months Ended March 31, 2016:
Foreign currency forwards	Fixed-maturity securities	$	857		$	(44	)	$	901	$	(882	)	$	19
Foreign currency options	Fixed-maturity securities	(1		)	(1		)	0		0			0

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

The following table summarizes the impact to realized investment gains (losses) and other comprehensive income (loss) from all derivatives and hedging instruments.

	Three Months Ended March 31,
	2017								2016
(In millions)	Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)				Realized Investment Gains (Losses)				Other Comprehensive Income (Loss)(1)
Qualifying hedges:
Cash flow hedges:
Foreign currency swaps		$	0			$	2			$	0			$	3
Total cash flow hedges		0				2				0				3
Fair value hedges:
Foreign currency forwards(2)		(31		)		0				(25		)		0
Foreign currency options(2)		14				0				(1		)		0
Total fair value hedges		(17		)		0				(26		)		0
Net investment hedge:
Non-derivative hedging instruments		0				(17		)		0				(15		)
Foreign currency forwards		0				(9		)		0				(50		)
Foreign currency options		0				(23		)		0				(16		)
Total net investment hedge		0				(49		)		0				(81		)
Non-qualifying strategies:
Foreign currency swaps		(8		)		0				10				0
Foreign currency forwards		(27		)		0				11				0
Credit default swaps		0				0				1				0
Total non-qualifying strategies		(35		)		0				22				0
Total		$	(52	)		$	(47	)		$	(4	)		$	(78	)

⁽¹⁾ Cash flow hedge items are recorded as unrealized gains (losses) on derivatives and net investment hedge items are recorded in the unrealized foreign currency translation gains (losses) line in the consolidated statement of comprehensive income (loss).

⁽²⁾ Impact shown net of effect of hedged items (see Fair Value Hedges section of this Note 4 for further detail)

Fair Value and Notional Amount of Derivatives with Counterparty Credit Risk

The counterparties to these derivatives are financial institutions with the following credit ratings:

	March 31, 2017										December 31, 2016
(In millions)	Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value				Notional Amount of Derivatives			Asset Derivatives Fair Value			Liability Derivatives Fair Value
Counterparties' credit rating:
AA		$	6,391		$	125		$	(172	)		$	6,844		$	247		$	(308	)
A		27,619			449			(862		)		36,019			900			(1,621		)
BBB		441			6			(65		)		1,064			60			(69		)
Total		$	34,451		$	580		$	(1,099	)		$	43,927		$	1,207		$	(1,998	)

Offsetting Assets

Offsetting of Financial Assets and Derivative Assets

March 31, 2017
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	434		$	0		$	434		$	(336	)	$	0		$	(97	)		$	1
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		146						146													146
Total derivative       assets		580			0			580			(336		)	0			(97		)		147
Securities lending    and similar    arrangements		1,445			0			1,445			0			0			(1,445		)		0
Total		$	2,025		$	0		$	2,025		$	(336	)	$	0		$	(1,542	)		$	147

December 31, 2016
										Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Assets			Gross Amount Offset in Balance Sheet			Net Amount of Assets Presented  in Balance Sheet			Financial Instruments				Securities Collateral		Cash Collateral Received				Net Amount
Derivative   assets:
Derivative       assets subject to a       master netting       agreement or       offsetting       arrangement		$	1,080		$	0		$	1,080		$	(698	)	$	0		$	(382	)		$	0
Derivative       assets not subject       to a master netting       agreement or       offsetting       arrangement		127						127													127
Total derivative       assets		1,207			0			1,207			(698		)	0			(382		)		127
Securities lending    and similar    arrangements		513			0			513			0			0			(513		)		0
Total		$	1,720		$	0		$	1,720		$	(698	)	$	0		$	(895	)		$	127

Offsetting Liabilities

Offsetting of Financial Liabilities and Derivative Liabilities

March 31, 2017
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(974	)		$	0		$	(974	)		$	336	$	527		$	23		$	(88	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(125		)					(125		)										(125		)
Total derivative       liabilities		(1,099		)		0			(1,099		)		336		527			23			(213		)
Securities lending    and similar    arrangements		(1,482		)		0			(1,482		)		1,445		0			0			(37		)
Total		$	(2,581	)		$	0		$	(2,581	)		$	1,781	$	527		$	23		$	(250	)

December 31, 2016
												Gross Amounts Not Offset in Balance Sheet
(In millions)	Gross Amount of Recognized Liabilities				Gross Amount Offset in Balance Sheet			Net Amount of Liabilities Presented  in Balance Sheet				Financial Instruments			Securities Collateral		Cash Collateral Pledged			Net Amount
Derivative   liabilities:
Derivative       liabilities subject       to a master netting       agreement or       offsetting       arrangement		$	(1,852	)		$	0		$	(1,852	)		$	698	$	1,130		$	21		$	(3	)
Derivative       liabilities not       subject to a       master netting       agreement or       offsetting       arrangement		(146		)					(146		)										(146		)
Total derivative       liabilities		(1,998		)		0			(1,998		)		698		1,130			21			(149		)
Securities lending    and similar    arrangements		(526		)		0			(526		)		513		0			0			(13		)
Total		$	(2,524	)		$	0		$	(2,524	)		$	1,211	$	1,130		$	21		$	(162	)

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FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Hierarchy, Assets and Liabilities Measured on Recurring Basis

The following tables present the fair value hierarchy levels of the Company's assets and liabilities that are measured and carried at fair value on a recurring basis.

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	28,457		$	863		$	0		$	29,320
Municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities		0			309			195			504
Public utilities		0			7,827			16			7,843
Sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions		0			6,521			24			6,545
Other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions		0			1,551			0			1,551
Other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities		1,339			6			4			1,349
Other assets:
Foreign currency swaps		0			174			144			318
Foreign currency forwards		0			235			0			235
Foreign currency options		0			25			0			25
Credit default swaps		0			0			2			2
Total other assets		0			434			146			580
Other investments		141			0			0			141
Cash and cash equivalents		4,205			0			0			4,205
Total assets		$	34,142		$	50,560		$	420		$	85,122
Liabilities:
Foreign currency swaps		$	0		$	99		$	125		$	224
Foreign currency forwards		0			853			0			853
Foreign currency options		0			22			0			22
Total liabilities		$	0		$	974		$	125		$	1,099

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies		$	25,387		$	827		$	0		$	26,214
Municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities		0			7,667			16			7,683
Sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions		0			6,038			25			6,063
Other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions		0			1,420			0			1,420
Other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities		1,300			6			3			1,309
Other assets:
Foreign currency swaps		0			365			125			490
Foreign currency forwards		0			672			0			672
Foreign currency options		0			43			0			43
Credit default swaps		0			0			2			2
Total other assets		0			1,080			127			1,207
Other investments		276			0			0			276
Cash and cash equivalents		4,859			0			0			4,859
Total assets		$	31,822		$	50,853		$	369		$	83,044
Liabilities:
Foreign currency swaps		$	0		$	84		$	146		$	230
Foreign currency forwards		0			1,717			0			1,717
Foreign currency options		0			51			0			51
Total liabilities		$	0		$	1,852		$	146		$	1,998

Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost

The following tables present the carrying amount and fair value categorized by fair value hierarchy level for the Company's financial instruments that are not carried at fair value.

	March 31, 2017
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	21,493		$	26,607		$	0		$	0		$	26,607
Municipalities		363			0			467			0			467
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,324			0			3,693			0			3,693
Sovereign and supranational		2,702			0			3,009			0			3,009
Banks/financial institutions		3,650			0			3,830			0			3,830
Other corporate		2,839			0			3,285			0			3,285
Other investments (1)		1,309			0			0			1,288			1,288
Total assets		$	35,710		$	26,607		$	14,294		$	1,310		$	42,211
Liabilities:
Other policyholders’ funds		$	6,945		$	0		$	0		$	6,824		$	6,824
Notes payable (excluding capital leases)		5,230			0			5,226			266			5,492
Total liabilities		$	12,175		$	0		$	5,226		$	7,090		$	12,316

⁽¹⁾Excludes policy loans of $197 and equity method investments of $54, at carrying value

	December 31, 2016
(In millions)	Carrying Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Assets:
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies		$	20,702		$	26,040		$	0		$	0		$	26,040
Municipalities		350			0			457			0			457
Mortgage and asset-backed securities		30			0			10			22			32
Public utilities		3,201			0			3,536			0			3,536
Sovereign and supranational		2,602			0			2,877			0			2,877
Banks/financial institutions		3,731			0			3,900			0			3,900
Other corporate		2,734			0			3,179			0			3,179
Other investments		1,174			0			0			1,142			1,142
Total assets		$	34,524		$	26,040		$	13,959		$	1,164		$	41,163
Liabilities:
Other policyholders’ funds		$	6,659		$	0		$	0		$	6,540		$	6,540
Notes payable (excluding capital leases)		5,339			0			0			5,530			5,530
Total liabilities		$	11,998		$	0		$	0		$	12,070		$	12,070

Fair Value Assets Available-for-Sale Securities Primary Pricing Sources

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	25,387		$	827		$	0		$	26,214
Total government and agencies		25,387			827			0			26,214
Municipalities:
Third party pricing vendor		0			1,295			0			1,295
Total municipalities		0			1,295			0			1,295
Mortgage- and asset-backed securities:
Third party pricing vendor		0			1,139			0			1,139
Broker/other		0			0			198			198
Total mortgage- and asset-backed securities		0			1,139			198			1,337
Public utilities:
Third party pricing vendor		0			7,667			0			7,667
Broker/other		0			0			16			16
Total public utilities		0			7,667			16			7,683
Sovereign and supranational:
Third party pricing vendor		0			1,469			0			1,469
Total sovereign and supranational		0			1,469			0			1,469
Banks/financial institutions:
Third party pricing vendor		0			6,038			0			6,038
Broker/other		0			0			25			25
Total banks/financial institutions		0			6,038			25			6,063
Other corporate:
Third party pricing vendor		0			29,699			0			29,699
Total other corporate		0			29,699			0			29,699
Total fixed maturities		25,387			48,134			239			73,760
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,420			0			1,420
Total banks/financial institutions		0			1,420			0			1,420
Other corporate:
Third party pricing vendor		0			213			0			213
Total other corporate		0			213			0			213
Total perpetual securities		0			1,633			0			1,633
Equity securities:
Third party pricing vendor		1,300			6			0			1,306
Broker/other		0			0			3			3
Total equity securities		1,300			6			3			1,309
Total securities available for sale		$	26,687		$	49,773		$	242		$	76,702

The following tables present the pricing sources for the fair values of our fixed maturities, perpetual securities, and equity securities.

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities available for sale, carried at fair value:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	28,457		$	863		$	0		$	29,320
Total government and agencies		28,457			863			0			29,320
Municipalities:
Third party pricing vendor		0			1,322			0			1,322
Total municipalities		0			1,322			0			1,322
Mortgage- and asset-backed securities:
Third party pricing vendor		0			309			0			309
Broker/other		0			0			195			195
Total mortgage- and asset-backed securities		0			309			195			504
Public utilities:
Third party pricing vendor		0			7,827			0			7,827
Broker/other		0			0			16			16
Total public utilities		0			7,827			16			7,843
Sovereign and supranational:
Third party pricing vendor		0			1,386			0			1,386
Total sovereign and supranational		0			1,386			0			1,386
Banks/financial institutions:
Third party pricing vendor		0			6,521			0			6,521
Broker/other		0			0			24			24
Total banks/financial institutions		0			6,521			24			6,545
Other corporate:
Third party pricing vendor		0			30,122			0			30,122
Broker/other		0			0			35			35
Total other corporate		0			30,122			35			30,157
Total fixed maturities		28,457			48,350			270			77,077
Perpetual securities:
Banks/financial institutions:
Third party pricing vendor		0			1,551			0			1,551
Total banks/financial institutions		0			1,551			0			1,551
Other corporate:
Third party pricing vendor		0			219			0			219
Total other corporate		0			219			0			219
Total perpetual securities		0			1,770			0			1,770
Equity securities:
Third party pricing vendor		1,339			6			0			1,345
Broker/other		0			0			4			4
Total equity securities		1,339			6			4			1,349
Total securities available for sale		$	29,796		$	50,126		$	274		$	80,196

Fair Value Assets Held-To-Maturity Securities Primary Pricing Sources

	December 31, 2016
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,040		$	0		$	0		$	26,040
Total government and agencies		26,040			0			0			26,040
Municipalities:
Third party pricing vendor		0			457			0			457
Total municipalities		0			457			0			457
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,536			0			3,536
Total public utilities		0			3,536			0			3,536
Sovereign and supranational:
Third party pricing vendor		0			2,877			0			2,877
Total sovereign and supranational		0			2,877			0			2,877
Banks/financial institutions:
Third party pricing vendor		0			3,900			0			3,900
Total banks/financial institutions		0			3,900			0			3,900
Other corporate:
Third party pricing vendor		0			3,179			0			3,179
Total other corporate		0			3,179			0			3,179
Total securities held to maturity		$	26,040		$	13,959		$	22		$	40,021

	March 31, 2017
(In millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
Securities held to maturity, carried at amortized cost:
Fixed maturities:
Government and agencies:
Third party pricing vendor		$	26,607		$	0		$	0		$	26,607
Total government and agencies		26,607			0			0			26,607
Municipalities:
Third party pricing vendor		0			467			0			467
Total municipalities		0			467			0			467
Mortgage- and asset-backed securities:
Third party pricing vendor		0			10			0			10
Broker/other		0			0			22			22
Total mortgage- and asset-backed securities		0			10			22			32
Public utilities:
Third party pricing vendor		0			3,693			0			3,693
Total public utilities		0			3,693			0			3,693
Sovereign and supranational:
Third party pricing vendor		0			3,009			0			3,009
Total sovereign and supranational		0			3,009			0			3,009
Banks/financial institutions:
Third party pricing vendor		0			3,830			0			3,830
Total banks/financial institutions		0			3,830			0			3,830
Other corporate:
Third party pricing vendor		0			3,285			0			3,285
Total other corporate		0			3,285			0			3,285
Total securities held to maturity		$	26,607		$	14,294		$	22		$	40,923

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

Transfers between Hierarchy Levels and Level 3 Rollforward

There were no transfers between Level 1 and 2 for the three-month periods ended March 31, 2017 and 2016, respectively.

The following tables present the changes in fair value of our available-for-sale investments and derivatives classified as Level 3.

Three Months Ended March 31, 2017
	Fixed Maturities										Equity Securities			Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions			Other Corporate					Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	198		$	16	$	25		$	0	$	3		$	(21	)	$	2	$	223
Realized investment gains (losses) included    in earnings	0			0		0			0		0			38			0		38
Unrealized gains (losses) included in other    comprehensive income (loss)	6			0		(1		)	0		0			2			0		7
Purchases, issuances, sales and settlements:
Purchases	0			0		0			35		2			0			0		37
Issuances	0			0		0			0		0			0			0		0
Sales	0			0		0			0		(1		)	0			0		(1		)
Settlements	(9		)	0		0			0		0			0			0		(9		)
Transfers into Level 3	0			0		0			0		0			0			0		0
Transfers out of Level 3	0			0		0			0		0			0			0		0
Balance, end of period	$	195		$	16	$	24		$	35	$	4		$	19		$	2	$	295
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0		$	0	$	0		$	38		$	0	$	38

⁽¹⁾ Derivative assets and liabilities are presented net

Three Months Ended March 31, 2016
	Fixed Maturities							Equity Securities		Derivatives (1)
(In millions)	Mortgage- and Asset- Backed Securities			Public Utilities		Banks/ Financial Institutions				Foreign Currency Swaps			Credit Default Swaps		Total
Balance, beginning of period	$	220		$	0	$	26	$	3	$	(192	)	$	1	$	58
Realized investment gains (losses) included    in earnings	0			0		0		0		125			1		126
Unrealized gains (losses) included in other    comprehensive income (loss)	21			0		0		0		4			0		25
Purchases, issuances, sales and settlements:
Purchases	0			0		0		0		0			0		0
Issuances	0			0		0		0		0			0		0
Sales	0			0		0		0		0			0		0
Settlements	(4		)	0		0		0		0			0		(4		)
Transfers into Level 3	0			0		0		0		0			0		0
Transfers out of Level 3	0			0		0		0		0			0		0
Balance, end of period	$	237		$	0	$	26	$	3	$	(63	)	$	2	$	205
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities still held at the end of the period included in realized investment gains (losses)	$	0		$	0	$	0	$	0	$	125		$	1	$	126

⁽¹⁾ Derivative assets and liabilities are presented net

Fair Value Inputs Assets Quantitative Information

December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	198	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		25		Consensus pricing	Offered quotes	N/A	(d)
Equity securities		3		Net asset value	Offered quotes	$1-$701 ($8)
Other assets:
Foreign currency swaps		16		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		29		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	16 - 88 bps
		80		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	52.18% - 56.07%	(e)
					CDS spreads	54 bps
					Recovery rate	36.69%
Total assets		$	369

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices

The following tables summarize the significant unobservable inputs used in the valuation of our Level 3 available-for-sale investments and derivatives. Included in the tables are the inputs or range of possible inputs that have an effect on the overall valuation of the financial instruments.

March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Assets:
Securities available for sale, carried at fair value:
Fixed maturities:
Mortgage- and asset-backed securities		$	195	Consensus pricing	Offered quotes	N/A	(d)
Public utilities		16		Discounted cash flow	Historical volatility	N/A	(d)
Banks/financial institutions		24		Consensus pricing	Offered quotes	N/A	(d)
Other corporate		35		Discounted cash flow	Historical volatility	N/A	(e)
Equity securities		4		Net asset value	Offered quotes	$1 - $728 ($8)
Other assets:
Foreign currency swaps		25		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		50		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	10 - 79 bps
		69		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Credit default swaps		2		Discounted cash flow	Base correlation	61.55% - 66.55%	(e)
					CDS spreads	48 bps
					Recovery rate	36.69%
Total assets		$	420

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

(d) N/A represents securities where we receive unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques or unobservable inputs.

(e) Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices.

Fair Value Inputs Liabilities Quantitative Information

December 31, 2016
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	113	Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	17 - 172 bps
					Foreign exchange rates	21.47%	(c)
		23		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					CDS spreads	24 - 216 bps
		10		Discounted cash flow	Interest rates (USD)	2.34% - 2.59%	(a)
					Interest rates (JPY)	.22% - .80%	(b)
					Foreign exchange rates	21.47%	(c)
Total liabilities		$	146

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

March 31, 2017
(In millions)	Fair Value			Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Liabilities:
Foreign currency swaps		$	106	Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	11 - 147 bps
					Foreign exchange rates	21.34%	(c)
		13		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					CDS spreads	15 - 168 bps
		6		Discounted cash flow	Interest rates (USD)	2.18% - 2.45%	(a)
					Interest rates (JPY)	.20% - .73%	(b)
					Foreign exchange rates	21.34%	(c)
Total liabilities		$	125

(a) Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

(b) Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

(c) Based on 10 year volatility of JPY/USD exchange rate

XML

POLICY LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2017

Insurance Loss Reserves [Abstract]

Schedule of Liability for Unpaid Claims Adjustment Expense

Changes in the liability for unpaid policy claims were as follows for the three-month periods ended March 31:

(In millions)	2017				2016
Unpaid supplemental health claims, beginning of year		$	3,707			$	3,548
Less reinsurance recoverables		27				26
Net balance, beginning of year		3,680				3,522
Add claims incurred during the year related to:
Current year		1,737				1,705
Prior years		(111		)		(142		)
Total incurred		1,626				1,563
Less claims paid during the year on claims incurred during:
Current year		505				493
Prior years		1,055				1,046
Total paid		1,560				1,539
Effect of foreign exchange rate changes on unpaid claims		80				136
Net balance, end of period		3,826				3,682
Add reinsurance recoverables		29				28
Unpaid supplemental health claims, end of period		3,855				3,710
Unpaid life claims, end of period		375				280
Total liability for unpaid policy claims		$	4,230			$	3,990

XML

REINSURANCE (Tables)

3 Months Ended

Mar. 31, 2017

Reinsurance Disclosures [Abstract]

Effects of Reinsurance

The following table reconciles direct premium income and direct benefits and claims to net amounts after the effect of reinsurance.

	Three Months Ended March 31,
(In millions)	2017				2016
Direct premium income		$	4,724			$	4,690
Ceded to other companies:
Ceded Aflac Japan closed blocks		(130		)		(134		)
Other		(12		)		(12		)
Assumed from other companies:
Retrocession activities		54				56
Other		2				2
Net premium income		$	4,638			$	4,602
Direct benefits and claims		$	3,129			$	3,103
Ceded benefits and change in reserves for future benefits:
Ceded Aflac Japan closed blocks		(122		)		(121		)
Eliminations		13				14
Other		(11		)		(10		)
Assumed from other companies:
Retrocession activities		54				53
Eliminations		(13		)		(14		)
Other		2				0
Benefits and claims, net		$	3,052			$	3,025

XML

NOTES PAYABLE (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

A summary of notes payable follows:

(In millions)	March 31, 2017			December 31, 2016
2.65% senior notes paid February 2017		$	0		$	649
2.40% senior notes due March 2020		545			547
4.00% senior notes due February 2022		346			348
3.625% senior notes due June 2023		693			696
3.625% senior notes due November 2024		742			745
3.25% senior notes due March 2025		444			445
2.875% senior notes due October 2026		298			298
6.90% senior notes due December 2039		221			220
6.45% senior notes due August 2040		255			254
4.00% senior notes due October 2046		394			394
5.50% subordinated debentures due September 2052		495			486
Yen-denominated senior notes:
.932% senior notes due January 2027 (principal amount 60.0 billion yen)		531			0
Yen-denominated loans:
Variable interest rate loan due September 2021 (.31% in 2017 and 2016, principal amount 5.0 billion yen)		44			43
Variable interest rate loan due September 2023 (.46% in 2017 and 2016, principal amount 25.0 billion yen)		222			214
Capitalized lease obligations payable through 2024		20			21
Total notes payable		$	5,250		$	5,360

Amounts in the table above are reported net of debt issuance costs and issuance premiums or discounts, if applicable, that are being amortized over the life of the notes.

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SHAREHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2017

Stockholders' Equity Note [Abstract]

Schedule of Common Stock Outstanding Roll Forward

The following table is a reconciliation of the number of shares of the Company's common stock for the three-month periods ended March 31.

(In thousands of shares)	2017		2016
Common stock - issued:
Balance, beginning of period	671,249		669,723
Exercise of stock options and issuance of restricted shares	434		678
Balance, end of period	671,683		670,401
Treasury stock:
Balance, beginning of period	265,439		245,343
Purchases of treasury stock:
Open market	8,493		10,152
Other	144		189
Dispositions of treasury stock:
Shares issued to AFL Stock Plan	(247	)	(311	)
Exercise of stock options	(128	)	(64	)
Other	(20	)	(111	)
Balance, end of period	273,681		255,198
Shares outstanding, end of period	398,002		415,203

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the approximate number of share-based awards to purchase shares, on a weighted-average basis, that were considered to be anti-dilutive and were excluded from the calculation of diluted earnings per share for the following periods.

	Three Months Ended March 31,
(In thousands)	2017		2016
Anti-dilutive share-based awards		321		2,682

Schedule of Accumulated Other Comprehensive Income (Loss)

Reclassifications from Accumulated Other Comprehensive Income

The tables below are reconciliations of accumulated other comprehensive income by component for the following periods.

Changes in Accumulated Other Comprehensive Income

Three Months Ended March 31, 2017
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(1,983	)		$	4,805			$	(24	)		$	(168	)		$	2,630
Other comprehensive income (loss) before reclassification		333				(341		)		2				(4		)		(10		)
Amounts reclassified from accumulated other comprehensive income (loss)		0				10				0				2				12
Net current-period other comprehensive income (loss)		333				(331		)		2				(2		)		2
Balance, end of period		$	(1,650	)		$	4,474			$	(22	)		$	(170	)		$	2,632

All amounts in the table above are net of tax.

Three Months Ended March 31, 2016
(In millions)	Unrealized Foreign Currency Translation Gains (Losses)				Unrealized Gains (Losses) on Investment Securities				Unrealized Gains (Losses) on Derivatives				Pension Liability Adjustment				Total
Balance, beginning of period		$	(2,196	)		$	2,986			$	(26	)		$	(139	)		$	625
Other comprehensive income (loss) before reclassification		612				1,748				2				(1		)		2,361
Amounts reclassified from accumulated other comprehensive income (loss)		0				(50		)		0				0				(50		)
Net current-period other comprehensive income (loss)		612				1,698				2				(1		)		2,311
Balance, end of period		$	(1,584	)		$	4,684			$	(24	)		$	(140	)		$	2,936

All amounts in the table above are net of tax.

Reclassification Out Of Accumulated Other Comprehensive Income

The tables below summarize the amounts reclassified from each component of accumulated other comprehensive income based on source for the following periods.

Reclassifications Out of Accumulated Other Comprehensive Income

(In millions)	Three Months Ended March 31, 2017
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	(6	)	Sales and redemptions
		(10		)	Other-than-temporary impairment losses realized
		(16		)	Total before tax
		6			Tax (expense) or benefit(1)
		$	(10	)	Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		0			Acquisition and operating expenses(2)
		1			Tax (expense) or benefit(1)
		$	(2	)	Net of tax
Total reclassifications for the period		$	(12	)	Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

(In millions)	Three Months Ended March 31, 2016
Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income				Affected Line Item in the Statements of Earnings
Unrealized gains (losses) on available-for-sale securities		$	91		Sales and redemptions
		(14		)	Other-than-temporary impairment losses realized
		77			Total before tax
		(27		)	Tax (expense) or benefit(1)
		$	50		Net of tax
Amortization of defined benefit pension items:
Actuarial gains (losses)		$	(3	)	Acquisition and operating expenses(2)
Prior service (cost) credit		3			Acquisition and operating expenses(2)
		0			Tax (expense) or benefit(1)
		$	0		Net of tax
Total reclassifications for the period		$	50		Net of tax

⁽¹⁾ Based on 35% tax rate

⁽²⁾ These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

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SHARE-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Options Outstanding and Exercisable

The following table provides information on stock options outstanding and exercisable at March 31, 2017.

	Stock Option Shares (in thousands)		Weighted-Average Remaining Term (in years)		Aggregate Intrinsic Value (in millions)			Weighted-Average Exercise Price Per Share
Outstanding		6,245		4.9		$	119		$	53.38
Exercisable		4,504		3.4		102			49.72

Schedule of Nonvested Restricted Stock Units Activity

(In thousands of shares)	Shares		Weighted-Average Grant-Date Fair Value Per Share
Restricted stock at December 31, 2016	1,868			$	61.76
Granted in 2017	489			71.97
Canceled in 2017	(4	)		65.05
Vested in 2017	(437	)		62.23
Restricted stock at March 31, 2017	1,916			$	64.12

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BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2017

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Net Benefit Costs

Pension and other postretirement benefit expenses, included in acquisition and operating expenses in the consolidated statement of earnings, included the following components:

	Three Months Ended March 31,
	Pension Benefits																Other
	Japan								U.S.								Postretirement Benefits
(In millions)	2017				2016				2017				2016				2017			2016
Components of net periodic benefit cost:
Service cost		$	5			$	4			$	6			$	6			$	0		$	0
Interest cost		1				2				8				8				0			0
Expected return on plan assets		(1		)		(1		)		(6		)		(6		)		0			0
Amortization of net actuarial loss		0				0				3				3				0			0
Amortization of prior service cost (credit)		0				0				0				0				0			(3		)
Net periodic (benefit) cost		$	5			$	5			$	11			$	11			$	0		$	(3	)

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Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Aflac Japan
Significant Accounting Policies [Line Items]
Aflac Japan's percentage of the Company's total revenues	69.00%	74.00%
Percentage of the Company Assets	84.00%		83.00%
Upper Limit
Significant Accounting Policies [Line Items]
Estimation of Percent of Leases Within Scope of the Guidance to Total Assets	1.00%
Estimation of Percent of Revenues Within Scope of the Guidance to Total Revenues	1.00%

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BUSINESS SEGMENT INFORMATION - Operations by Segment - Revenues (Details) $ in Millions		3 Months Ended
		Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Insurance Business Segments | segment		2
Net earned premiums		$ 4,638	$ 4,602
Net investment income		794	801
Total revenues		5,309	5,451
Realized investment gains (losses), non-operating	[1],[2],[3],[4],[5]	(109)	40
Gain (loss) on change in fair value of derivative, interest rate component, operating		21	22
Aflac Japan
Segment Reporting, Revenue Reconciling Item [Line Items]
Net earned premiums		3,194	3,179
Net investment income, less amortized hedge costs	[2]	557	590
Other income (loss)		10	8
Total revenues		3,761	3,777
Hedge costs		52	32
Aflac U.S.
Segment Reporting, Revenue Reconciling Item [Line Items]
Net earned premiums		1,390	1,367
Other income (loss)		1	3
Net investment income		178	174
Total revenues		1,569	1,544
Other business segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		67	65
Total Business Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		5,397	5,386
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		87	67
Intercompany eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ (66)	$ (42)

[1] Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

[2] Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing segment operations to conform to current year reporting.

[3] Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from pretax operating earnings when analyzing segment operations to conform to current year reporting.

[4] Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total earnings before income taxes.

[5] Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total revenues

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BUSINESS SEGMENT INFORMATION - Operations by Segment - Pretax Earnings (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		$ 1,027	$ 1,077
Realized investment gains (losses), non-operating	[1],[2],[3],[4],[5]	(109)	40
Other non-operating income (loss)	[4]	(20)	0
Earnings before income taxes		898	1,117
Income taxes applicable to pretax operating earnings		351	372
Effect of foreign currency translation on operating earnings		5	13
Gain (loss) on change in fair value of derivative, interest rate component, operating		21	22
Aflac Japan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings	[3]	769	806
Hedge costs		52	32
Aflac U.S.
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		310	332
Other business segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		0	3
Total Business Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		1,079	1,141
Interest expense, noninsurance operations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		(29)	(29)
Corporate and eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Pretax operating earnings		$ (23)	$ (35)

[1] Excluding a gain of $21 and $22 for the three-month periods ended March 31, 2017, and 2016, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

[2] Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing segment operations to conform to current year reporting.

[3] Hedge costs related to hedging U.S. dollar-denominated investments held in Aflac Japan were $52 and $32 for the three-month periods ended March 31, 2017, and 2016, respectively, and have been reclassified from realized investment gains (losses) and reported as a deduction from pretax operating earnings when analyzing segment operations to conform to current year reporting.

[4] Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total earnings before income taxes.

[5] Prior year foreign currency transaction gains and losses have been reclassified from other non-operating income (loss) to realized investment gains (losses) to conform to current-year reporting classifications. These reclassifications had no impact on total revenues

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BUSINESS SEGMENT INFORMATION - Operations by Segment - Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 133,650	$ 129,819
Aflac Japan
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	112,023	107,858
Aflac U.S.
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	19,817	19,453
Other business segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	338	270
Total Business Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	132,178	127,581
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	26,024	26,476
Intercompany eliminations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ (24,552)	$ (24,238)

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INVESTMENTS - Available-For-Sale Investments in Debt Securities, Perpetual Securities and Equity Securities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	$ 73,076	$ 69,072
Gross Unrealized Gains	8,504	8,722
Gross Unrealized Losses	1,384	1,092
Fair Value	80,196	76,702
Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	70,261	66,363
Gross Unrealized Gains	8,129	8,432
Gross Unrealized Losses	1,313	1,035
Fair Value	77,077	73,760
Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	1,563	1,506
Gross Unrealized Gains	257	176
Gross Unrealized Losses	50	49
Fair Value	1,770	1,633
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	1,252	1,203
Gross Unrealized Gains	118	114
Gross Unrealized Losses	21	8
Fair Value	1,349	1,309
Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	35,815	32,459
Gross Unrealized Gains	4,728	4,951
Gross Unrealized Losses	489	261
Fair Value	40,054	37,149
Yen-denominated | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	668	624
Gross Unrealized Gains	63	83
Gross Unrealized Losses	10	2
Fair Value	721	705
Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	34,446	33,904
Gross Unrealized Gains	3,401	3,481
Gross Unrealized Losses	824	774
Fair Value	37,023	36,611
Dollar-denominated | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	584	579
Gross Unrealized Gains	55	31
Gross Unrealized Losses	11	6
Fair Value	628	604
Japan government and agencies | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	26,311	22,857
Gross Unrealized Gains	3,203	3,359
Gross Unrealized Losses	366	160
Fair Value	29,148	26,056
Municipalities | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,322	1,295
Municipalities | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	281	246
Gross Unrealized Gains	26	29
Gross Unrealized Losses	12	8
Fair Value	295	267
Municipalities | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	901	894
Gross Unrealized Gains	133	142
Gross Unrealized Losses	7	8
Fair Value	1,027	1,028
Mortgage- and asset-backed securities | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	504	1,337
Mortgage- and asset-backed securities | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	272	1,096
Gross Unrealized Gains	32	33
Gross Unrealized Losses	0	8
Fair Value	304	1,121
Mortgage- and asset-backed securities | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	184	196
Gross Unrealized Gains	16	20
Gross Unrealized Losses	0	0
Fair Value	200	216
Public utilities | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	7,843	7,683
Public utilities | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	1,637	1,533
Gross Unrealized Gains	324	318
Gross Unrealized Losses	6	3
Fair Value	1,955	1,848
Public utilities | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	5,296	5,205
Gross Unrealized Gains	669	690
Gross Unrealized Losses	77	60
Fair Value	5,888	5,835
Sovereign and supranational | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,386	1,469
Sovereign and supranational | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	846	862
Gross Unrealized Gains	133	186
Gross Unrealized Losses	6	5
Fair Value	973	1,043
Sovereign and supranational | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	326	335
Gross Unrealized Gains	87	91
Gross Unrealized Losses	0	0
Fair Value	413	426
Banks/financial institutions | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	6,545	6,063
Banks/financial institutions | Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,551	1,420
Banks/financial institutions | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	3,039	2,673
Gross Unrealized Gains	414	403
Gross Unrealized Losses	83	74
Fair Value	3,370	3,002
Banks/financial institutions | Yen-denominated | Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	1,315	1,266
Gross Unrealized Gains	208	128
Gross Unrealized Losses	50	49
Fair Value	1,473	1,345
Banks/financial institutions | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	2,680	2,570
Gross Unrealized Gains	513	507
Gross Unrealized Losses	18	16
Fair Value	3,175	3,061
Banks/financial institutions | Dollar-denominated | Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	52	51
Gross Unrealized Gains	26	24
Gross Unrealized Losses	0	0
Fair Value	78	75
Other corporate | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	30,157	29,699
Other corporate | Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	219	213
Other corporate | Yen-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	3,429	3,192
Gross Unrealized Gains	596	623
Gross Unrealized Losses	16	3
Fair Value	4,009	3,812
Other corporate | Yen-denominated | Perpetual securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	196	189
Gross Unrealized Gains	23	24
Gross Unrealized Losses	0	0
Fair Value	219	213
Other corporate | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	24,898	24,556
Gross Unrealized Gains	1,972	2,021
Gross Unrealized Losses	722	690
Fair Value	26,148	25,887
U.S. government and agencies | Dollar-denominated | Fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	161	148
Gross Unrealized Gains	11	10
Gross Unrealized Losses	0	0
Fair Value	$ 172	$ 158

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INVESTMENTS - Held-to-Maturity Investments in Debt Securities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	$ 34,401	$ 33,350
Gross Unrealized Gains	6,553	6,735
Gross Unrealized Losses	31	64
Fair Value	40,923	40,021
Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Fair Value	40,923	40,021
Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	34,401	33,350
Gross Unrealized Gains	6,553	6,735
Gross Unrealized Losses	31	64
Fair Value	40,923	40,021
Japan government and agencies | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	21,493	20,702
Gross Unrealized Gains	5,114	5,338
Gross Unrealized Losses	0	0
Fair Value	26,607	26,040
Municipalities | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	363	350
Fair Value	467	457
Municipalities | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	363	350
Gross Unrealized Gains	104	107
Gross Unrealized Losses	0	0
Fair Value	467	457
Mortgage- and asset-backed securities | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	30	30
Fair Value	32	32
Mortgage- and asset-backed securities | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	30	30
Gross Unrealized Gains	2	2
Gross Unrealized Losses	0	0
Fair Value	32	32
Public utilities | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	3,324	3,201
Fair Value	3,693	3,536
Public utilities | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	3,324	3,201
Gross Unrealized Gains	376	358
Gross Unrealized Losses	7	23
Fair Value	3,693	3,536
Sovereign and supranational | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	2,702	2,602
Fair Value	3,009	2,877
Sovereign and supranational | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	2,702	2,602
Gross Unrealized Gains	307	283
Gross Unrealized Losses	0	8
Fair Value	3,009	2,877
Banks/financial institutions | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	3,650	3,731
Fair Value	3,830	3,900
Banks/financial institutions | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	3,650	3,731
Gross Unrealized Gains	204	195
Gross Unrealized Losses	24	26
Fair Value	3,830	3,900
Other corporate | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	2,839	2,734
Fair Value	3,285	3,179
Other corporate | Yen-denominated | Fixed maturities
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, fixed maturities, amortized cost	2,839	2,734
Gross Unrealized Gains	446	452
Gross Unrealized Losses	0	7
Fair Value	$ 3,285	$ 3,179

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INVESTMENTS - Additional Information (Detail) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($) investment issuer	Mar. 31, 2016 investment	Dec. 31, 2016 USD ($) issuer
Schedule of Investments [Line Items]
Held to maturity securities transferred to available for sale securities, number of investments | investment	0	0
Middle Market Loan Program Unfunded Amount	$ 135		$ 91
Middle market loan commitment	$ 658
Percentage that the lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be of the fair value of the loaned securities	102.00%
Allowance for loan losses for commercial mortgage loans and middle market loans	$ 4		3
Commercial mortgage loan commitments	18
Parent Company and Other Business Segments
Schedule of Investments [Line Items]
Securities available for sale, fixed maturities, amortized cost	630
Securities available for sale, fixed maturities, fair value	642
Variable Interest Entity, Not Consolidated
Schedule of Investments [Line Items]
Securities available for sale, fixed maturities, amortized cost	4,823		4,729
Securities available for sale, fixed maturities, fair value	$ 5,354		$ 5,261
Number of issuers of VIEs not-consolidated | issuer	149		145

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INVESTMENTS - Contractual Maturities of Investments in Fixed Maturities (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Held to maturity:
Total fixed maturities held to maturity, amortized cost	$ 34,401	$ 33,350
Held to maturity:
Total fixed maturities held to maturity, fair value	40,923	$ 40,021
Aflac Japan
Available for sale:
Due in one year or less	145
Due after one year through five years	3,561
Due after five years through 10 years	9,846
Due after 10 years	43,392
Mortgage- and asset-backed securities	316
Total fixed maturities available for sale, amortized cost	57,260
Held to maturity:
Due after one year through five years	2,086
Due after five years through 10 years	1,645
Due after 10 years	30,640
Mortgage- and asset-backed securities	30
Total fixed maturities held to maturity, amortized cost	34,401
Available for sale:
Due in one year or less	161
Due after one year through five years	3,788
Due after five years through 10 years	10,093
Due after 10 years	48,447
Mortgage- and asset-backed securities	361
Total fixed maturities available for sale, fair value	62,850
Held to maturity:
Due after one year through five years	2,193
Due after five years through 10 years	1,813
Due after 10 years	36,884
Mortgage- and asset-backed securities	33
Total fixed maturities held to maturity, fair value	40,923
Aflac U.S.
Available for sale:
Due in one year or less	74
Due after one year through five years	664
Due after five years through 10 years	3,128
Due after 10 years	8,462
Mortgage- and asset-backed securities	43
Total fixed maturities available for sale, amortized cost	12,371
Held to maturity:
Due after one year through five years	0
Due after five years through 10 years	0
Due after 10 years	0
Mortgage- and asset-backed securities	0
Total fixed maturities held to maturity, amortized cost	0
Available for sale:
Due in one year or less	77
Due after one year through five years	716
Due after five years through 10 years	3,324
Due after 10 years	9,421
Mortgage- and asset-backed securities	47
Total fixed maturities available for sale, fair value	13,585
Held to maturity:
Due after one year through five years	0
Due after five years through 10 years	0
Due after 10 years	0
Mortgage- and asset-backed securities	0
Total fixed maturities held to maturity, fair value	$ 0

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INVESTMENTS - Economic Maturities of Investments in Perpetual Securities (Detail) $ in Millions	Mar. 31, 2017 USD ($)
Aflac Japan
Investments Classified by Economic Maturity Date [Line Items]
Due in one year or less	$ 90
Due after one year through five years	196
Due after 10 years	1,238
Total perpetual securities available for sale, amortized cost	1,524
Due in one year or less	87
Due after one year through five years	219
Due after 10 years	1,407
Total perpetual securities available for sale, fair value	1,713
Aflac U.S.
Investments Classified by Economic Maturity Date [Line Items]
Due in one year or less	0
Due after one year through five years	0
Due after 10 years	39
Total perpetual securities available for sale, amortized cost	39
Due in one year or less	0
Due after one year through five years	0
Due after 10 years	57
Total perpetual securities available for sale, fair value	$ 57

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INVESTMENTS - Investment Exposures Individually Exceeded 10% of Shareholders' Equity (Details) - Japan National Government - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Summary of Investment Holdings [Line Items]
Credit Rating	[1]	A	A
Amortized Cost	[1]	$ 47,131	$ 42,931
Fair Value	[1]	$ 54,971	$ 51,345

[1] Japan Government Bonds (JGBs) or JGB-backed securities

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INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized		$ (10)	$ (14)
Derivative gains (losses)		(52)	(4)
Foreign currency gains (losses)		(71)	(43)
Total realized investment gains (losses)		(140)	30
Derivatives and other
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		(123)	(47)
Fixed maturities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		(36)	69
Perpetual securities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		0	8
Equity securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions(1)		25	0
Other-than-temporary impairment losses realized		(6)	0
Total realized investment gains (losses)		19	0
Available-for-sale securities | Fixed maturities
Gain (Loss) on Investments [Line Items]
Gross gains from sales		12	2
Gross losses from sales(1)	[1]	(15)	(4)
Net gains (losses) from redemptions(1)	[1]	(29)	83
Other-than-temporary impairment losses realized	[1]	(4)	(12)
Available-for-sale securities | Perpetual securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions(1)		0	10	[1]
Other-than-temporary impairment losses realized		$ 0	$ (2)	[1]

[1] Primarily driven by foreign exchange

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INVESTMENTS - Net Effect on Shareholders' Equity of Unrealized Gains and Losses from Investment Securities (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Investments [Abstract]
Unrealized Gains (Losses) on Available-for-sale Securities	$ 7,120	$ 7,630
Deferred income taxes	(2,646)	(2,825)
Shareholders' equity, unrealized gains (losses) on investment securities	$ 4,474	$ 4,805

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INVESTMENTS - Fair Value and Gross Unrealized Losses for Securities That Have Been in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	$ 21,897	$ 20,275
Total Unrealized Losses	1,415	1,156
Less than 12 months Fair Value	16,067	14,743
Less than 12 months Unrealized Losses	768	621
12 months or longer Fair Value	5,830	5,532
12 months or longer Unrealized Losses	647	535
Fixed maturities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	21,149	19,536
Total Unrealized Losses	1,344	1,099
Less than 12 months Fair Value	15,778	14,398
Less than 12 months Unrealized Losses	755	612
12 months or longer Fair Value	5,371	5,138
12 months or longer Unrealized Losses	589	487
Perpetual securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	409	479
Total Unrealized Losses	50	49
Less than 12 months Fair Value	0	85
Less than 12 months Unrealized Losses	0	1
12 months or longer Fair Value	409	394
12 months or longer Unrealized Losses	50	48
Equity securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	339	260
Total Unrealized Losses	21	8
Less than 12 months Fair Value	289	260
Less than 12 months Unrealized Losses	13	8
12 months or longer Fair Value	50	0
12 months or longer Unrealized Losses	8	0
Yen-denominated | Fixed maturities | Japan government and agencies
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	5,940	3,958
Total Unrealized Losses	366	160
Less than 12 months Fair Value	5,940	3,958
Less than 12 months Unrealized Losses	366	160
12 months or longer Fair Value	0	0
12 months or longer Unrealized Losses	0	0
Yen-denominated | Fixed maturities | Municipalities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	132	105
Total Unrealized Losses	12	8
Less than 12 months Fair Value	132	105
Less than 12 months Unrealized Losses	12	8
12 months or longer Fair Value	0	0
12 months or longer Unrealized Losses	0	0
Yen-denominated | Fixed maturities | Mortgage- and asset-backed securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value		713
Total Unrealized Losses		8
Less than 12 months Fair Value		713
Less than 12 months Unrealized Losses		8
12 months or longer Fair Value		0
12 months or longer Unrealized Losses		0
Yen-denominated | Fixed maturities | Public utilities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	325	635
Total Unrealized Losses	13	26
Less than 12 months Fair Value	127	347
Less than 12 months Unrealized Losses	6	14
12 months or longer Fair Value	198	288
12 months or longer Unrealized Losses	7	12
Yen-denominated | Fixed maturities | Sovereign and supranational
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	39	244
Total Unrealized Losses	6	13
Less than 12 months Fair Value	39	38
Less than 12 months Unrealized Losses	6	5
12 months or longer Fair Value	0	206
12 months or longer Unrealized Losses	0	8
Yen-denominated | Fixed maturities | Banks/financial institutions
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	1,531	1,521
Total Unrealized Losses	107	100
Less than 12 months Fair Value	646	636
Less than 12 months Unrealized Losses	34	19
12 months or longer Fair Value	885	885
12 months or longer Unrealized Losses	73	81
Yen-denominated | Fixed maturities | Other corporate
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	415	321
Total Unrealized Losses	16	10
Less than 12 months Fair Value	415	321
Less than 12 months Unrealized Losses	16	10
12 months or longer Fair Value	0	0
12 months or longer Unrealized Losses	0	0
Yen-denominated | Perpetual securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	409	479
Total Unrealized Losses	50	49
Less than 12 months Fair Value	0	85
Less than 12 months Unrealized Losses	0	1
12 months or longer Fair Value	409	394
12 months or longer Unrealized Losses	50	48
Yen-denominated | Equity securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	208	49
Total Unrealized Losses	10	2
Less than 12 months Fair Value	172	49
Less than 12 months Unrealized Losses	5	2
12 months or longer Fair Value	36	0
12 months or longer Unrealized Losses	5	0
Dollar-denominated | Fixed maturities | Municipalities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	45	44
Total Unrealized Losses	7	8
Less than 12 months Fair Value	0	0
Less than 12 months Unrealized Losses	0	0
12 months or longer Fair Value	45	44
12 months or longer Unrealized Losses	7	8
Dollar-denominated | Fixed maturities | Public utilities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	1,642	1,265
Total Unrealized Losses	77	60
Less than 12 months Fair Value	1,124	790
Less than 12 months Unrealized Losses	37	32
12 months or longer Fair Value	518	475
12 months or longer Unrealized Losses	40	28
Dollar-denominated | Fixed maturities | Banks/financial institutions
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	390	268
Total Unrealized Losses	18	16
Less than 12 months Fair Value	309	238
Less than 12 months Unrealized Losses	6	10
12 months or longer Fair Value	81	30
12 months or longer Unrealized Losses	12	6
Dollar-denominated | Fixed maturities | Other corporate
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	10,690	10,462
Total Unrealized Losses	722	690
Less than 12 months Fair Value	7,046	7,252
Less than 12 months Unrealized Losses	272	346
12 months or longer Fair Value	3,644	3,210
12 months or longer Unrealized Losses	450	344
Dollar-denominated | Equity securities
Investments, Unrealized Loss Position [Line Items]
Total Fair Value	131	211
Total Unrealized Losses	11	6
Less than 12 months Fair Value	117	211
Less than 12 months Unrealized Losses	8	6
12 months or longer Fair Value	14	0
12 months or longer Unrealized Losses	$ 3	$ 0

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INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Other Investments	[1]	$ 1,701	$ 1,450
Commercial mortgage loans
Investment Holdings [Line Items]
Other Investments		870	855
Middle market loans
Investment Holdings [Line Items]
Other Investments		439	319
Short-term investments
Investment Holdings [Line Items]
Other Investments		141	89
Policy loans
Investment Holdings [Line Items]
Other Investments		197	184
Other investments
Investment Holdings [Line Items]
Other Investments		$ 54	$ 3

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

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INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Other Investments, amortized cost	[1]	$ 1,701	$ 1,450
Asset derivatives		580	1,207
Assets, fair value		85,122	83,044
Liability derivatives		1,099	1,998
Liabilities		113,310	109,337
Liabilities, fair value disclosure		1,099	1,998
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Securities available for sale, fixed maturities, amortized cost		4,143	4,168
Securities available for sale, fixed maturities, fair value		4,964	4,982
Securities available for sale, perpetual securities, amortized cost		246	237
Securities available for sale, perpetual securities, fair value		215	208
Available-for-sale equity securities, amortized cost basis		1,013	972
Available-for-sale securities, equity securities		1,078	1,044
Other Investments, amortized cost	[2]	926	819
Other investments, fair value	[2]	906	789
Asset derivative, amortized cost	[3]	146	127
Asset derivatives	[3]	146	127
Assets, amortized cost		6,474	6,323
Assets, fair value		7,309	7,150
Liability derivatives, amortized cost	[3]	125	146
Liability derivatives	[3]	125	146
Liabilities		125	146
Liabilities, fair value disclosure		$ 125	$ 146

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

[2] Consists of CMLs and MMLs

[3] Consist entirely of derivatives

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INVESTMENTS - Investments in Variable Interest Entities Not Consolidated (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Securities held to maturity, fixed maturities, amortized cost		$ 34,401	$ 33,350
Securities held to maturity, fixed maturities, fair value		40,923	40,021
Other Investments	[1]	1,701	1,450
Assets, fair value		85,122	83,044
Variable Interest Entity, Not Consolidated
Variable Interest Entity [Line Items]
Securities available for sale, fixed maturities, amortized cost		4,823	4,729
Securities available for sale, fixed maturities, fair value		5,354	5,261
Securities available for sale, perpetual securities, amortized cost		178	172
Securities available for sale, perpetual securities, fair value		230	200
Securities held to maturity, fixed maturities, amortized cost		2,660	2,563
Securities held to maturity, fixed maturities, fair value		3,039	2,948
Other Investments		52	1
Other investments, fair value		52	1
Assets, amortized cost		7,713	7,465
Assets, fair value		$ 8,675	$ 8,410

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

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INVESTMENTS - Securities Lending Transactions Accounted for as Secured Borrowings (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		$ 1,482	$ 526
Gross amount of recognized liabilities for securities lending		1,482	526
Amounts related to agreements not included in offsetting disclosure in Note 4		0	0
Japan government and agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		885
Public utilities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		87	62
Banks/financial institutions
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		38	34
Other corporate
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		472	430
Maturity Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions	[1]	597	526
Maturity Overnight and Continuous | Japan government and agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions	[1]	0
Maturity Overnight and Continuous | Public utilities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions	[1]	87	62
Maturity Overnight and Continuous | Banks/financial institutions
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions	[1]	38	34
Maturity Overnight and Continuous | Other corporate
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions	[1]	472	430
Maturity up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		885	0
Maturity up to 30 Days | Japan government and agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		885
Maturity up to 30 Days | Public utilities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		0	0
Maturity up to 30 Days | Banks/financial institutions
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		0	0
Maturity up to 30 Days | Other corporate
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending transactions		$ 0	$ 0

[1] These securities are pledged as collateral under our U.S. securities lending program and can be called at our discretion; therefore, they are classified as Overnight and Continuous.

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DERIVATIVE INSTRUMENTS - Additional Information (Detail) $ in Millions, ¥ in Billions	3 Months Ended
	Mar. 31, 2017 USD ($) yr counterparties currency	Mar. 31, 2016 USD ($)	Mar. 31, 2017 JPY (¥) yr counterparties currency	Dec. 31, 2016 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Number of currencies related to foreign currency swaps | currency	1		1
Hedging activity weighted-average period (in years) | yr	9		9
Number of counterparties | counterparties	16		16
Number of counterparties that comprise majority of aggregate notional amount of swaps | counterparties	5		5
Percentage of notional amount of swaps from certain number of counterparties	67.00%		67.00%
Derivative, Net Liability Position, Aggregate Fair Value	$ 640			$ 1,200
Notional Amount of Derivatives	34,451			43,927
Cash flow hedges
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	75			$ 75
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	$ 0
2.40% senior notes due March 2020
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	550
4.00% senior notes due February 2022
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	350
3.625% senior notes due June 2023
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	700
3.625% senior notes due November 2024
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	750
3.25% senior notes due March 2025
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	450
5.50% subordinated notes due September 2052
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Debt instrument, principal amount	500
Future profit repatriation | Foreign currency forwards and options
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives | ¥			¥ 130.1
Middle market loans | Foreign currency forwards
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	198
Commercial mortgage loans | Foreign currency forwards
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	$ 780

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DERIVATIVE INSTRUMENTS - Summary of Balance Sheet Classification of Derivative Fair Value Amounts, as well as Gross Asset and Liability Fair Value Amounts (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 34,451	$ 43,927
Derivative asset, fair value, gross asset including not subject to master netting arrangement	580	1,207
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(1,099)	(1,998)
Asset derivatives fair value	434	1,080
Liability derivatives fair value	(974)	(1,852)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,115	18,329
Asset derivatives fair value	580	1,207
Liability derivatives fair value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	20,336	25,598
Asset derivatives fair value	0	0
Liability derivatives fair value	(1,099)	(1,998)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Asset derivatives fair value	0	0
Liability derivatives fair value	(6)	(10)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Asset derivatives fair value	0	0
Liability derivatives fair value	(6)	(10)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	15,265	15,189
Asset derivatives fair value	15	2
Liability derivatives fair value	(432)	(791)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	9,705	10,965
Asset derivatives fair value	10	0
Liability derivatives fair value	(428)	(759)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,560	4,224
Asset derivatives fair value	5	2
Liability derivatives fair value	(4)	(32)
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,160	1,052
Asset derivatives fair value	20	46
Liability derivatives fair value	(22)	(19)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	236	209
Asset derivatives fair value	0	5
Liability derivatives fair value	(4)	(2)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	924	843
Asset derivatives fair value	20	41
Liability derivatives fair value	(18)	(17)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	17,951	27,611
Asset derivatives fair value	545	1,159
Liability derivatives fair value	(639)	(1,178)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,890	6,266
Asset derivatives fair value	318	490
Liability derivatives fair value	(218)	(220)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	11,972	21,218
Asset derivatives fair value	225	667
Liability derivatives fair value	(421)	(956)
Non-qualifying strategies | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	0	41
Asset derivatives fair value	0	0
Liability derivatives fair value	0	(2)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	89	86
Asset derivatives fair value	2	2
Liability derivatives fair value	$ 0	$ 0

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DERIVATIVE INSTRUMENTS - Gains (Losses) Recognized on Fair Value Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fixed-maturity securities and equity securities | Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	$ 341
Gains (losses) on derivatives excluded from effectiveness testing	(48)
Gains (losses) on derivatives included in effectiveness testing	389
Gains (losses) recognized for hedged items	(372)
Ineffectiveness recognized for fair value hedge	17
Fixed maturities | Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives		$ 857
Gains (losses) on derivatives excluded from effectiveness testing		(44)
Gains (losses) on derivatives included in effectiveness testing		901
Gains (losses) recognized for hedged items		(882)
Ineffectiveness recognized for fair value hedge		19
Fixed maturities | Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	24	(1)
Gains (losses) on derivatives excluded from effectiveness testing	13	(1)
Gains (losses) on derivatives included in effectiveness testing	11	0
Gains (losses) recognized for hedged items	(10)	0
Ineffectiveness recognized for fair value hedge	$ 1	$ 0

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DERIVATIVE INSTRUMENTS - Derivatives and Hedging Instruments Gain (Loss) Summary (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized foreign currency translation gains (losses) during period		$ 375	$ 689
Derivative and other gains (losses)		(52)	(4)
Derivative and non-derivative hedging instruments gain loss recognized in other comprehensive income effective portion before tax	[1]	(47)	(78)
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	2	3
Cash flow hedges | Foreign currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	2	3
Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		(17)	(26)
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	0	0
Fair value hedges | Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)	[2]	(31)	(25)
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1],[2]	0	0
Fair value hedges | Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)	[2]	14	(1)
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1],[2]	0	0
Net investment hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Unrealized foreign currency translation gains (losses) during period	[1]	(49)	(81)
Net investment hedge | Non-derivative hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Unrealized foreign currency translation gains (losses) during period	[1]	(17)	(15)
Net investment hedge | Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Unrealized foreign currency translation gains (losses) during period	[1]	(9)	(50)
Net investment hedge | Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)		0	0
Unrealized foreign currency translation gains (losses) during period	[1]	(23)	(16)
Non-qualifying strategies
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net		(35)	22
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	0	0
Non-qualifying strategies | Foreign currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net		(8)	10
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	0	0
Non-qualifying strategies | Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net		(27)	11
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	0	0
Non-qualifying strategies | Credit default swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net		0	1
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	[1]	$ 0	$ 0

[1] Cash flow hedge items are recorded as unrealized gains (losses) on derivatives and net investment hedge items are recorded in the unrealized foreign currency translation gains (losses) line in the consolidated statement of comprehensive income (loss).

[2] Impact shown net of effect of hedged items (see Fair Value Hedges section of this Note 4 for further detail)

XML

DERIVATIVE INSTRUMENTS - Fair Value and Notional Amounts of Derivatives With Counterparty Credit Risk (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	$ 34,451	$ 43,927
Asset Derivatives Fair Value	580	1,207
Liability Derivatives Fair Value	(1,099)	(1,998)
AA
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	6,391	6,844
Asset Derivatives Fair Value	125	247
Liability Derivatives Fair Value	(172)	(308)
A
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	27,619	36,019
Asset Derivatives Fair Value	449	900
Liability Derivatives Fair Value	(862)	(1,621)
BBB
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	441	1,064
Asset Derivatives Fair Value	6	60
Liability Derivatives Fair Value	$ (65)	$ (69)

XML

DERIVATIVE INSTRUMENTS - Offsetting of Financial Assets and Derivative Assets (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	$ 434	$ 1,080
Gross amount of liabilities offset in balance sheet	0	0
Net amount of derivative assets presented in the balance sheet	434	1,080
Financial instruments, amount not offset	(336)	(698)
Derivative, collateral, obligation to return securities	0	0
Derivative, collateral, obligation to return cash	(97)	(382)
Derivative asset, fair value, amount offset against collateral, subject to master netting agreement	1	0
Derivative asset, not subject to master netting arrangement	146	127
Derivative asset, fair value, amount offset against collateral, not subject to master netting agreement	146	127
Derivative asset, fair value, gross asset including not subject to master netting arrangement	580	1,207
Net amount of derivative assets presented in balance sheet	580	1,207
Derivative asset, fair value, amount offset against collateral	147	127
Offsetting assets
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	2,025	1,720
Gross amounts offset in balance sheet	0	0
Net amounts of assets presented in balance sheet	2,025	1,720
Carrying value of financial instruments not offset in balance sheet	(336)	(698)
Securities collateral, not offset in balance sheet	0	0
Cash collateral, not offset in balance sheet	(1,542)	(895)
Financial instruments, amount offset against collateral	147	127
Offsetting assets | Securities lending and similar arrangements
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	1,445	513
Gross amounts offset in balance sheet	0	0
Net amounts of assets presented in balance sheet	1,445	513
Carrying value of financial instruments not offset in balance sheet	0	0
Securities collateral, not offset in balance sheet	0	0
Cash collateral, not offset in balance sheet	(1,445)	(513)
Financial instruments, amount offset against collateral	$ 0	$ 0

XML

DERIVATIVE INSTRUMENTS - Offsetting of Financial Liabilities and Derivative Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Gross amount of recognized derivative liabilities	$ (974)	$ (1,852)
Gross amount of assets offset in balance sheet	0	0
Derivative liability, fair value, amount not offset against collateral	(974)	(1,852)
Financial instruments, amount not offset	336	698
Derivative, collateral, right to reclaim securities	527	1,130
Derivative, collateral, right to reclaim cash	23	21
Derivative liability, fair value, amount offset against collateral, subject to master netting agreement	(88)	(3)
Derivative liability, not subject to master netting arrangement	(125)	(146)
Derivative liability, fair value, amount offset against collateral, not subject to master netting agreement	(125)	(146)
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(1,099)	(1,998)
Net amount of derivative liabilities presented in balance sheet	(1,099)	(1,998)
Derivative liability, fair value, amount offset against collateral	(213)	(149)
Foreign currency swaps
Offsetting Liabilities [Line Items]
Net amount of derivative liabilities presented in balance sheet	(224)	(230)
Foreign currency forwards
Offsetting Liabilities [Line Items]
Net amount of derivative liabilities presented in balance sheet	(853)	(1,717)
Foreign currency options
Offsetting Liabilities [Line Items]
Net amount of derivative liabilities presented in balance sheet	(22)	(51)
Offsetting liabilities
Offsetting Liabilities [Line Items]
Gross amounts of recognized financial instruments	(2,581)	(2,524)
Gross amounts offset in balance sheet	0	0
Net amounts of liabilities presented in balance sheet	(2,581)	(2,524)
Carrying value of financial instruments not offset in balance sheet	1,781	1,211
Securities collateral, not offset in balance sheet	527	1,130
Cash collateral, not offset in balance sheet	23	21
Financial instruments, amount offset against collateral	(250)	(162)
Offsetting liabilities | Securities lending and similar arrangements
Offsetting Liabilities [Line Items]
Gross amounts of recognized financial instruments	(1,482)	(526)
Gross amounts offset in balance sheet	0	0
Net amounts of liabilities presented in balance sheet	(1,482)	(526)
Carrying value of financial instruments not offset in balance sheet	1,445	513
Securities collateral, not offset in balance sheet	0	0
Cash collateral, not offset in balance sheet	0	0
Financial instruments, amount offset against collateral	$ (37)	$ (13)

XML

FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Assets:
Available-for-sale Securities	$ 80,196	$ 76,702
Asset derivatives	580	1,207
Other Investments	141	276
Cash and cash equivalents	4,205	4,859
Total assets	85,122	83,044
Liabilities:
Liability derivatives	1,099	1,998
Total liabilities	1,099	1,998
Foreign currency swaps
Assets:
Asset derivatives	318	490
Liabilities:
Liability derivatives	224	230
Foreign currency forwards
Assets:
Asset derivatives	235	672
Liabilities:
Liability derivatives	853	1,717
Foreign currency options
Assets:
Asset derivatives	25	43
Liabilities:
Liability derivatives	22	51
Credit default swaps
Assets:
Asset derivatives	2	2
Fixed maturities
Assets:
Available-for-sale Securities	77,077	73,760
Fixed maturities | Government and agencies
Assets:
Available-for-sale Securities	29,320	26,214
Fixed maturities | Municipalities
Assets:
Available-for-sale Securities	1,322	1,295
Fixed maturities | Mortgage- and asset-backed securities
Assets:
Available-for-sale Securities	504	1,337
Fixed maturities | Public utilities
Assets:
Available-for-sale Securities	7,843	7,683
Fixed maturities | Sovereign and supranational
Assets:
Available-for-sale Securities	1,386	1,469
Fixed maturities | Banks/financial institutions
Assets:
Available-for-sale Securities	6,545	6,063
Fixed maturities | Other corporate
Assets:
Available-for-sale Securities	30,157	29,699
Perpetual securities
Assets:
Available-for-sale Securities	1,770	1,633
Perpetual securities | Banks/financial institutions
Assets:
Available-for-sale Securities	1,551	1,420
Perpetual securities | Other corporate
Assets:
Available-for-sale Securities	219	213
Equity securities
Assets:
Available-for-sale Securities	1,349	1,309
Level 1
Assets:
Available-for-sale Securities	29,796	26,687
Asset derivatives	0	0
Other Investments	141	276
Cash and cash equivalents	4,205	4,859
Total assets	34,142	31,822
Liabilities:
Total liabilities	0	0
Level 1 | Foreign currency swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 1 | Foreign currency forwards
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 1 | Foreign currency options
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 1 | Credit default swaps
Assets:
Asset derivatives	0	0
Level 1 | Fixed maturities
Assets:
Available-for-sale Securities	28,457	25,387
Level 1 | Fixed maturities | Government and agencies
Assets:
Available-for-sale Securities	28,457	25,387
Level 1 | Fixed maturities | Municipalities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed maturities | Mortgage- and asset-backed securities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed maturities | Public utilities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed maturities | Sovereign and supranational
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed maturities | Banks/financial institutions
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed maturities | Other corporate
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities | Banks/financial institutions
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities | Other corporate
Assets:
Available-for-sale Securities	0	0
Level 1 | Equity securities
Assets:
Available-for-sale Securities	1,339	1,300
Level 2
Assets:
Available-for-sale Securities	50,126	49,773
Asset derivatives	434	1,080
Other Investments	0	0
Cash and cash equivalents	0	0
Total assets	50,560	50,853
Liabilities:
Total liabilities	974	1,852
Level 2 | Foreign currency swaps
Assets:
Asset derivatives	174	365
Liabilities:
Liability derivatives	99	84
Level 2 | Foreign currency forwards
Assets:
Asset derivatives	235	672
Liabilities:
Liability derivatives	853	1,717
Level 2 | Foreign currency options
Assets:
Asset derivatives	25	43
Liabilities:
Liability derivatives	22	51
Level 2 | Credit default swaps
Assets:
Asset derivatives	0	0
Level 2 | Fixed maturities
Assets:
Available-for-sale Securities	48,350	48,134
Level 2 | Fixed maturities | Government and agencies
Assets:
Available-for-sale Securities	863	827
Level 2 | Fixed maturities | Municipalities
Assets:
Available-for-sale Securities	1,322	1,295
Level 2 | Fixed maturities | Mortgage- and asset-backed securities
Assets:
Available-for-sale Securities	309	1,139
Level 2 | Fixed maturities | Public utilities
Assets:
Available-for-sale Securities	7,827	7,667
Level 2 | Fixed maturities | Sovereign and supranational
Assets:
Available-for-sale Securities	1,386	1,469
Level 2 | Fixed maturities | Banks/financial institutions
Assets:
Available-for-sale Securities	6,521	6,038
Level 2 | Fixed maturities | Other corporate
Assets:
Available-for-sale Securities	30,122	29,699
Level 2 | Perpetual securities
Assets:
Available-for-sale Securities	1,770	1,633
Level 2 | Perpetual securities | Banks/financial institutions
Assets:
Available-for-sale Securities	1,551	1,420
Level 2 | Perpetual securities | Other corporate
Assets:
Available-for-sale Securities	219	213
Level 2 | Equity securities
Assets:
Available-for-sale Securities	6	6
Level 3
Assets:
Available-for-sale Securities	274	242
Asset derivatives	146	127
Other Investments	0	0
Cash and cash equivalents	0	0
Total assets	420	369
Liabilities:
Total liabilities	125	146
Level 3 | Foreign currency swaps
Assets:
Asset derivatives	144	125
Liabilities:
Liability derivatives	125	146
Level 3 | Foreign currency forwards
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 3 | Foreign currency options
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 3 | Credit default swaps
Assets:
Asset derivatives	2	2
Level 3 | Fixed maturities
Assets:
Available-for-sale Securities	270	239
Level 3 | Fixed maturities | Government and agencies
Assets:
Available-for-sale Securities	0	0
Level 3 | Fixed maturities | Municipalities
Assets:
Available-for-sale Securities	0	0
Level 3 | Fixed maturities | Mortgage- and asset-backed securities
Assets:
Available-for-sale Securities	195	198
Level 3 | Fixed maturities | Public utilities
Assets:
Available-for-sale Securities	16	16
Level 3 | Fixed maturities | Sovereign and supranational
Assets:
Available-for-sale Securities	0	0
Level 3 | Fixed maturities | Banks/financial institutions
Assets:
Available-for-sale Securities	24	25
Level 3 | Fixed maturities | Other corporate
Assets:
Available-for-sale Securities	35	0
Level 3 | Perpetual securities
Assets:
Available-for-sale Securities	0	0
Level 3 | Perpetual securities | Banks/financial institutions
Assets:
Available-for-sale Securities	0	0
Level 3 | Perpetual securities | Other corporate
Assets:
Available-for-sale Securities	0	0
Level 3 | Equity securities
Assets:
Available-for-sale Securities	$ 4	$ 3

XML

FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost (Details) - USD ($) $ in Millions		Mar. 31, 2017		Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Investments	[1]	$ 1,701		$ 1,450
Assets:
Securities held to maturity, fixed maturities, amortized cost		34,401		33,350
Securities held to maturity, fixed maturities, fair value		40,923		40,021
Other investments carried at amortized cost		1,309	[2]	1,174
Other investments carried at amortized cost, fair value		1,288	[2]	1,142
Total financial instruments assets not carried at fair value		35,710		34,524
Assets fair value disclosure financial instruments carried at cost		42,211		41,163
Liabilities
Other policyholder funds		6,945		6,659
Other policyholders' funds fair value disclosure		6,824		6,540
Notes payable		5,230		5,339
Notes payable fair value disclosure		5,492		5,530
Total financial instrument liabilities not carried at fair value		12,175		11,998
Liabilities fair value disclosure financial instruments carried at cost		12,316		12,070
Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		40,923		40,021
Government and agencies | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		21,493		20,702
Securities held to maturity, fixed maturities, fair value		26,607		26,040
Municipalities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		363		350
Securities held to maturity, fixed maturities, fair value		467		457
Mortgage- and asset-backed securities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		30		30
Securities held to maturity, fixed maturities, fair value		32		32
Public utilities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		3,324		3,201
Securities held to maturity, fixed maturities, fair value		3,693		3,536
Sovereign and supranational | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		2,702		2,602
Securities held to maturity, fixed maturities, fair value		3,009		2,877
Banks/financial institutions | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		3,650		3,731
Securities held to maturity, fixed maturities, fair value		3,830		3,900
Other corporate | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, amortized cost		2,839		2,734
Securities held to maturity, fixed maturities, fair value		3,285		3,179
Policy loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Investments		197		184
Equity method investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Investments		54
Level 1
Assets:
Other investments carried at amortized cost, fair value		0	[2]	0
Assets fair value disclosure financial instruments carried at cost		26,607		26,040
Liabilities
Other policyholders' funds fair value disclosure		0		0
Notes payable fair value disclosure		0		0
Liabilities fair value disclosure financial instruments carried at cost		0		0
Level 1 | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		26,607		26,040
Level 1 | Government and agencies | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		26,607		26,040
Level 1 | Municipalities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 1 | Mortgage- and asset-backed securities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 1 | Public utilities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 1 | Sovereign and supranational | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 1 | Banks/financial institutions | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 1 | Other corporate | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 2
Assets:
Other investments carried at amortized cost, fair value		0	[2]	0
Assets fair value disclosure financial instruments carried at cost		14,294		13,959
Liabilities
Other policyholders' funds fair value disclosure		0		0
Notes payable fair value disclosure		5,226		0
Liabilities fair value disclosure financial instruments carried at cost		5,226		0
Level 2 | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		14,294		13,959
Level 2 | Government and agencies | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 2 | Municipalities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		467		457
Level 2 | Mortgage- and asset-backed securities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		10		10
Level 2 | Public utilities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		3,693		3,536
Level 2 | Sovereign and supranational | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		3,009		2,877
Level 2 | Banks/financial institutions | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		3,830		3,900
Level 2 | Other corporate | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		3,285		3,179
Level 3
Assets:
Other investments carried at amortized cost, fair value		1,288	[2]	1,142
Assets fair value disclosure financial instruments carried at cost		1,310		1,164
Liabilities
Other policyholders' funds fair value disclosure		6,824		6,540
Notes payable fair value disclosure		266		5,530
Liabilities fair value disclosure financial instruments carried at cost		7,090		12,070
Level 3 | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		22		22
Level 3 | Government and agencies | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 3 | Municipalities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 3 | Mortgage- and asset-backed securities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		22		22
Level 3 | Public utilities | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 3 | Sovereign and supranational | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 3 | Banks/financial institutions | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		0		0
Level 3 | Other corporate | Fixed maturities
Assets:
Securities held to maturity, fixed maturities, fair value		$ 0		$ 0

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities

[2] Excludes policy loans of $197 and equity method investments of $54, at carrying value

XML

FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets by Pricing Source, Available-for-Sale Securities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 80,196	$ 76,702
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	29,796	26,687
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	50,126	49,773
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	274	242
Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	77,077	73,760
Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	28,457	25,387
Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	48,350	48,134
Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	270	239
Perpetual securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,770	1,633
Perpetual securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Perpetual securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,770	1,633
Perpetual securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,349	1,309
Equity securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,339	1,300
Equity securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6	6
Equity securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	4	3
Equity securities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,345	1,306
Equity securities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,339	1,300
Equity securities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6	6
Equity securities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Equity securities | Net asset value valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	4	3
Equity securities | Net asset value valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Equity securities | Net asset value valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Equity securities | Net asset value valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	4	3
Government and agencies | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	29,320	26,214
Government and agencies | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	28,457	25,387
Government and agencies | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	863	827
Government and agencies | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	29,320	26,214
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	28,457	25,387
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	863	827
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Municipalities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,322	1,295
Municipalities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Municipalities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,322	1,295
Municipalities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Municipalities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,322	1,295
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,322	1,295
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	504	1,337
Mortgage- and asset-backed securities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	309	1,139
Mortgage- and asset-backed securities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	195	198
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	309	1,139
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	309	1,139
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	195	198
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	195	198
Public utilities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	7,843	7,683
Public utilities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Public utilities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	7,827	7,667
Public utilities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16	16
Public utilities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	7,827	7,667
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	7,827	7,667
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Public utilities | Fixed maturities | Discounted cash flow valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16	16
Public utilities | Fixed maturities | Discounted cash flow valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Public utilities | Fixed maturities | Discounted cash flow valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Public utilities | Fixed maturities | Discounted cash flow valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16	16
Sovereign and supranational | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,386	1,469
Sovereign and supranational | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Sovereign and supranational | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,386	1,469
Sovereign and supranational | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,386	1,469
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,386	1,469
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6,545	6,063
Banks/financial institutions | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6,521	6,038
Banks/financial institutions | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	24	25
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6,521	6,038
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6,521	6,038
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	24	25
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	24	25
Banks/financial institutions | Perpetual securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,551	1,420
Banks/financial institutions | Perpetual securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Perpetual securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,551	1,420
Banks/financial institutions | Perpetual securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Perpetual securities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,551	1,420
Banks/financial institutions | Perpetual securities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Banks/financial institutions | Perpetual securities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,551	1,420
Banks/financial institutions | Perpetual securities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	30,157	29,699
Other corporate | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	30,122	29,699
Other corporate | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	35	0
Other corporate | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	30,122	29,699
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	30,122	29,699
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Fixed maturities | Discounted cash flow valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	35
Other corporate | Fixed maturities | Discounted cash flow valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0
Other corporate | Fixed maturities | Discounted cash flow valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0
Other corporate | Fixed maturities | Discounted cash flow valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	35
Other corporate | Perpetual securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	219	213
Other corporate | Perpetual securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Perpetual securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	219	213
Other corporate | Perpetual securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Perpetual securities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	219	213
Other corporate | Perpetual securities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other corporate | Perpetual securities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	219	213
Other corporate | Perpetual securities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 0	$ 0

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FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets by Pricing Source, Held-to-Maturity Securities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	$ 40,923	$ 40,021
Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	40,923	40,021
Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	26,607	26,040
Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	14,294	13,959
Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	22	22
Government and agencies | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	26,607	26,040
Government and agencies | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	26,607	26,040
Government and agencies | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Government and agencies | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	26,607	26,040
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	26,607	26,040
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Government and agencies | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Municipalities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	467	457
Municipalities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Municipalities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	467	457
Municipalities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Municipalities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	467	457
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	467	457
Municipalities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	32	32
Mortgage- and asset-backed securities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	10	10
Mortgage- and asset-backed securities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	22	22
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	10	10
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	10	10
Mortgage- and asset-backed securities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	22	22
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	22	22
Public utilities | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,693	3,536
Public utilities | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Public utilities | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,693	3,536
Public utilities | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Public utilities | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,693	3,536
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,693	3,536
Public utilities | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Sovereign and supranational | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,009	2,877
Sovereign and supranational | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Sovereign and supranational | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,009	2,877
Sovereign and supranational | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,009	2,877
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,009	2,877
Sovereign and supranational | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Banks/financial institutions | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,830	3,900
Banks/financial institutions | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Banks/financial institutions | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,830	3,900
Banks/financial institutions | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,830	3,900
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,830	3,900
Banks/financial institutions | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Other corporate | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,285	3,179
Other corporate | Fixed maturities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Other corporate | Fixed maturities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,285	3,179
Other corporate | Fixed maturities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Other corporate | Fixed maturities | Third party pricing vendor valuation technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,285	3,179
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	0	0
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	3,285	3,179
Other corporate | Fixed maturities | Third party pricing vendor valuation technique | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity, fixed maturities, fair value	$ 0	$ 0

XML

FAIR VALUE MEASUREMENTS - Changes in Available-For-Sale Investments and Derivatives Classified as Level 3 (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		$ 223	$ 58
Realized investment gains (losses) included in earnings		38	126
Unrealized gains (losses) included in other comprehensive income (loss)		7	25
Purchases		37	0
Issuances		0	0
Sales		(1)	0
Settlements		(9)	(4)
Transfers into Level 3		0	0
Transfers out of Level 3		0
Balance, end of period		295	205
Change in unrealized gains (losses) still held		38	126
Foreign currency swaps
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	[1]	(21)	(192)
Realized gains or losses included in earnings	[1]	38	125
Unrealized gains or losses included in other comprehensive income (loss)	[1]	2	4
Purchases	[1]	0	0
Issuances	[1]	0	0
Sales	[1]	0	0
Settlements	[1]	0	0
Transfers into Level 3	[1]	0	0
Transfers out of Level 3	[1]	0
Balance, end of period	[1]	19	(63)
Changes in unrealized gain (losses) still held	[1]	38	125
Credit default swaps
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	[1]	2	1
Realized gains or losses included in earnings	[1]	0	1
Unrealized gains or losses included in other comprehensive income (loss)	[1]	0	0
Purchases	[1]	0	0
Issuances	[1]	0	0
Sales	[1]	0	0
Settlements	[1]	0	0
Transfers into Level 3	[1]	0	0
Transfers out of Level 3	[1]	0
Balance, end of period	[1]	2	2
Changes in unrealized gain (losses) still held	[1]	0	1
Fixed maturities | Mortgage- and asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		198	220
Realized investment gains (losses) included in earnings		0	0
Unrealized gains (losses) included in other comprehensive income (loss)		6	21
Purchases		0	0
Issuances		0	0
Sales		0	0
Settlements		(9)	(4)
Transfers into Level 3		0	0
Transfers out of Level 3		0
Balance, end of period		195	237
Change in unrealized gains (losses) still held		0	0
Fixed maturities | Public utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		16	0
Realized investment gains (losses) included in earnings		0	0
Unrealized gains (losses) included in other comprehensive income (loss)		0	0
Purchases		0	0
Issuances		0	0
Sales		0	0
Settlements		0	0
Transfers into Level 3		0	0
Transfers out of Level 3		0
Balance, end of period		16	0
Change in unrealized gains (losses) still held		0	0
Fixed maturities | Banks/financial institutions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		25	26
Realized investment gains (losses) included in earnings		0	0
Unrealized gains (losses) included in other comprehensive income (loss)		(1)	0
Purchases		0	0
Issuances		0	0
Sales		0	0
Settlements		0	0
Transfers into Level 3		0	0
Transfers out of Level 3		0
Balance, end of period		24	26
Change in unrealized gains (losses) still held		0	0
Fixed maturities | Other corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		0
Realized investment gains (losses) included in earnings		0
Unrealized gains (losses) included in other comprehensive income (loss)		0
Purchases		35
Issuances		0
Sales		0
Settlements		0
Transfers into Level 3		0
Transfers out of Level 3		0
Balance, end of period		35
Change in unrealized gains (losses) still held		0
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		3	3
Realized investment gains (losses) included in earnings		0	0
Unrealized gains (losses) included in other comprehensive income (loss)		0	0
Purchases		2	0
Issuances		0	0
Sales		(1)	0
Settlements		0	0
Transfers into Level 3		0	0
Transfers out of Level 3		0
Balance, end of period		4	3
Change in unrealized gains (losses) still held		$ 0	$ 0

[1] Derivative assets and liabilities are presented net

XML

FAIR VALUE MEASUREMENTS - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0	$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	$ 0	$ 0

XML

FAIR VALUE MEASUREMENTS - Fair Value Inputs Assets Quantitative Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 80,196	$ 76,702
Asset derivatives		580	1,207
Assets, fair value		$ 85,122	$ 83,044
Length of Volatility of Japanese Yen to US Dollar Exchange Rate		10 years	10 years
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 274	$ 242
Asset derivatives		146	127
Assets, fair value		420	369
Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		77,077	73,760
Fixed maturities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		270	239
Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		1,770	1,633
Perpetual securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		0	0
Equity securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		1,349	1,309
Equity securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		4	3
Equity securities | Net asset value valuation technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		4	3
Equity securities | Net asset value valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 4	$ 3
Equity securities | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Offered Quotes		$ 1	$ 1
Equity securities | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Offered Quotes		728	701
Equity securities | Assets | Weighted Average | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Offered Quotes		$ 8	$ 8
Mortgage- and asset-backed securities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 504	$ 1,337
Mortgage- and asset-backed securities | Fixed maturities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		195	198
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		195	198
Mortgage- and asset-backed securities | Fixed maturities | Consensus pricing valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		195	198
Public utilities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		7,843	7,683
Public utilities | Fixed maturities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		16	16
Public utilities | Fixed maturities | Discounted cash flow valuation technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		16	16
Public utilities | Fixed maturities | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		16	16
Banks/financial institutions | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		6,545	6,063
Banks/financial institutions | Fixed maturities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		24	25
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		24	25
Banks/financial institutions | Fixed maturities | Consensus pricing valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		24	25
Banks/financial institutions | Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		1,551	1,420
Banks/financial institutions | Perpetual securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		0	0
Other corporate | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		30,157	29,699
Other corporate | Fixed maturities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		35	0
Other corporate | Fixed maturities | Discounted cash flow valuation technique
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		35
Other corporate | Fixed maturities | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		35
Other corporate | Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		219	213
Other corporate | Perpetual securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		0	0
Foreign currency swaps
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		318	490
Foreign currency swaps | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		144	125
Credit default swaps
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		2	2
Credit default swaps | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		2	2
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		$ 25	$ 16
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Foreign Exchange Rates	[1]	21.34%	21.47%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.11%	0.17%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		1.47%	1.72%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		$ 50	$ 29
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.10%	0.16%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.79%	0.88%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		$ 69	$ 80
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Assets | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Foreign Exchange Rates	[1]	21.34%	21.47%
Fair Value, Unobservable Input, Base Correlation, CDS Spreads, Recovery Rate | Credit default swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset derivatives		$ 2	$ 2
Fair Value, Unobservable Input, Base Correlation, CDS Spreads, Recovery Rate | Credit default swaps | Assets | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.48%	0.54%
Fair Value Inputs, Recovery Rate		36.69%	36.69%
Fair Value, Unobservable Input, Base Correlation, CDS Spreads, Recovery Rate | Credit default swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Base Correlation	[2]	61.55%	52.18%
Fair Value, Unobservable Input, Base Correlation, CDS Spreads, Recovery Rate | Credit default swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Base Correlation	[2]	66.55%	56.07%
Dollar-denominated | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 37,023	$ 36,611
Dollar-denominated | Equity securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		628	604
Dollar-denominated | Mortgage- and asset-backed securities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		200	216
Dollar-denominated | Public utilities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		5,888	5,835
Dollar-denominated | Banks/financial institutions | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		3,175	3,061
Dollar-denominated | Banks/financial institutions | Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		78	75
Dollar-denominated | Other corporate | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 26,148	$ 25,887
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.45%	2.59%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.45%	2.59%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	2.45%	2.59%
Yen-denominated | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 40,054	$ 37,149
Yen-denominated | Equity securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		721	705
Yen-denominated | Mortgage- and asset-backed securities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		304	1,121
Yen-denominated | Public utilities | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		1,955	1,848
Yen-denominated | Banks/financial institutions | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		3,370	3,002
Yen-denominated | Banks/financial institutions | Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		1,473	1,345
Yen-denominated | Other corporate | Fixed maturities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		4,009	3,812
Yen-denominated | Other corporate | Perpetual securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities		$ 219	$ 213
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.73%	0.80%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.73%	0.80%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Assets | Lower Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Assets | Upper Limit | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[4]	0.73%	0.80%

[1] Based on 10 year volatility of JPY/USD exchange rate

[2] Range of base correlation for our bespoke tranche for attachment and detachment points corresponding to market indices.

[3] Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

[4] Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

XML

FAIR VALUE MEASUREMENTS - Fair Value Inputs Liabilities Quantitative Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		$ 1,099	$ 1,998
Liabilities, fair value disclosure		$ 1,099	$ 1,998
Length of Volatility of Japanese Yen to US Dollar Exchange Rate		10 years	10 years
Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liabilities, fair value disclosure		$ 125	$ 146
Foreign currency swaps
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		224	230
Foreign currency swaps | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		125	146
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		$ 106	$ 113
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Foreign Exchange Rates	[1]	21.34%	21.47%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.11%	0.17%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		1.47%	1.72%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		$ 13	$ 23
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		0.15%	0.24%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk		1.68%	2.16%
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Discounted cash flow valuation technique | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liability derivatives		$ 6	$ 10
Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Liability | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Foreign Exchange Rates	[1]	21.34%	21.47%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.45%	2.59%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.45%	2.59%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.18%	2.34%
Dollar-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[2]	2.45%	2.59%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.73%	0.80%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spread | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.73%	0.80%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Liability | Lower Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.20%	0.22%
Yen-denominated | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and Foreign Exchange Rates | Foreign currency swaps | Liability | Upper Limit | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	[3]	0.73%	0.80%

[1] Based on 10 year volatility of JPY/USD exchange rate

[2] Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps

[3] Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

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POLICY LIABILITIES - Changes in Liability for Unpaid Policy Claims (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Liability for Unpaid Claims and Claims Expenses
Net balance, beginning of year	$ 4,045
Less claims paid during the year on claims incurred during:
Net balance, end of year	4,230
Total liability for unpaid policy claims	4,230	$ 3,990
Health insurance
Liability for Unpaid Claims and Claims Expenses
Unpaid supplemental health claims, beginning of year	3,707	3,548
Less reinsurance recoverables	27	26
Net balance, beginning of year	3,680	3,522
Add claims incurred during the year related to:
Current year	1,737	1,705
Prior years	(111)	(142)
Total incurred	1,626	1,563
Less claims paid during the year on claims incurred during:
Current year	505	493
Prior years	1,055	1,046
Total paid	1,560	1,539
Effect of foreign exchange rate changes on unpaid claims	80	136
Net balance, end of year	3,826	3,682
Add reinsurance recoverables	29	28
Total liability for unpaid policy claims	3,855	3,710
Life insurance
Less claims paid during the year on claims incurred during:
Total liability for unpaid policy claims	$ 375	$ 280

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REINSURANCE - Additional Information (Details) $ in Millions, ¥ in Billions	3 Months Ended
	Mar. 31, 2017 JPY (¥)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Effects of Reinsurance [Line Items]
Percent change in spot yen/dollar exchange rate		4.00%
Percent change in ceded reserves		1.00%
Aflac Japan
Effects of Reinsurance [Line Items]
Committed reinsurance facility | ¥	¥ 110
Aflac Japan | Closed Block
Effects of Reinsurance [Line Items]
Reinsurance deferred profit liability		$ 919
Reinsurance recoverable		$ 900	$ 860

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REINSURANCE - Effect of Reinsurance on Premiums and Benefits and Claims (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Effects of Reinsurance [Line Items]
Direct premium income	$ 4,724	$ 4,690
Net premium income	4,638	4,602
Direct benefits and claims	3,129	3,103
Benefits and claims, net	3,052	3,025
All other
Effects of Reinsurance [Line Items]
Ceded premiums	(12)	(12)
Assumed premiums earned	2	2
Ceded benefits and claims	(11)	(10)
Assumed benefits and claims from other companies	2	0
Aflac Japan
Effects of Reinsurance [Line Items]
Net premium income	3,194	3,179
Aflac Japan | Closed Block
Effects of Reinsurance [Line Items]
Ceded premiums	(130)	(134)
Assumed premiums earned	54	56
Ceded benefits and claims	(122)	(121)
Assumed benefits and claims from other companies	54	53
Intercompany eliminations
Effects of Reinsurance [Line Items]
Ceded benefits and claims	13	14
Assumed benefits and claims from other companies	$ (13)	$ (14)

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NOTES PAYABLE - Additional Information (Details) ¥ in Millions	1 Months Ended		3 Months Ended
	Feb. 28, 2017 USD ($)	Jan. 31, 2017 JPY (¥)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 JPY (¥)	Dec. 31, 2016
2.65% senior notes paid February 2017
Debt Instrument [Line Items]
Debt instrument, interest rate	2.65%				2.65%
Repayments of debt	$ 650,000,000
.932% senior notes due January 2027
Debt Instrument [Line Items]
Debt instrument, principal amount | ¥		¥ 60,000		¥ 60,000
Debt instrument, interest rate		0.932%	0.932%	0.932%
Debt instrument, term		10 years
Notes payable
Debt Instrument [Line Items]
Debt instrument, debt default, amount			$ 0
$100 million dollar line of credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 100,000,000
Line of credit facility term			364 days
Line of credit facility, interest rate description			Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period.
Line of credit facility, amount outstanding			$ 0
100.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity | ¥				¥ 100,000
Line of credit facility term			3 years
Line of credit facility, interest rate description			Borrowings bear interest at a rate per annum equal to the Tokyo interbank market rate (TIBOR) plus, at our option, either (a) the applicable TIBOR margin during the period from the closing date to the commitment termination date or (b) the applicable TIBOR margin during the term out period. The applicable margin ranges between .35% and .75% during the period from the closing date to the commitment termination date and .70% and 1.50% during the term out period, depending on the Parent Company’s debt ratings as of the date of determination.
Line of credit facility, amount outstanding | ¥				0
55.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity | ¥				55,000
Line of credit facility term			5 years
Line of credit facility, interest rate description			Borrowings bear interest at a rate per annum equal to, at our option, either (a) a eurocurrency rate determined by reference to the LIBOR for the interest period relevant to such borrowing adjusted for certain additional costs or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus ½ of 1%, (2) the rate of interest for such day announced by Mizuho Bank, Ltd. as its prime rate and (3) the eurocurrency rate for an interest period of one month plus 1.00%, in each case plus an applicable margin. The applicable margin ranges between .79% and 1.275% for eurocurrency rate borrowings and 0.0% and .275% for base rate borrowings, depending on the Parent Company’s debt ratings as of the date of determination.
Line of credit facility, amount outstanding | ¥				¥ 0
$50 million dollar line of credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 50,000,000
Line of credit facility, interest rate description			Borrowings will bear interest at the rate quoted by the bank and agreed upon at the time of making such loan and will have up to a three-month maturity period.
Line of credit facility, amount outstanding			$ 0
Line of credit
Debt Instrument [Line Items]
Debt instrument, debt default, amount			$ 0
Lower Limit | 100.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage			0.30%
Lower Limit | 55.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage			0.085%
Upper Limit | 100.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage			0.50%
Upper Limit | 55.0 billion yen line of credit
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage			0.225%

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NOTES PAYABLE - Summary of Notes Payable (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Notes payable	$ 5,250	$ 5,360
2.65% senior notes paid February 2017
Debt Instrument [Line Items]
Notes payable	0	649
2.40% senior notes due March 2020
Debt Instrument [Line Items]
Notes payable	545	547
4.00% senior notes due February 2022
Debt Instrument [Line Items]
Notes payable	346	348
3.625% senior notes due June 2023
Debt Instrument [Line Items]
Notes payable	693	696
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Notes payable	742	745
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Notes payable	444	445
2.875% senior notes due October 2026
Debt Instrument [Line Items]
Notes payable	298	298
6.90% senior notes due December 2039
Debt Instrument [Line Items]
Notes payable	221	220
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Notes payable	255	254
4.00% senior notes due October 2046
Debt Instrument [Line Items]
Notes payable	394	394
5.50% subordinated notes due September 2052
Debt Instrument [Line Items]
Notes payable	495	486
.932% senior notes due January 2027
Debt Instrument [Line Items]
Notes payable	531	0
Yen-denominated loan variable interest rate due September 2021
Debt Instrument [Line Items]
Notes payable	44	43
Yen-denominated loan variable interest rate due September 2023
Debt Instrument [Line Items]
Notes payable	222	214
Capitalized Lease Obligations
Debt Instrument [Line Items]
Notes payable	$ 20	$ 21

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NOTES PAYABLE - Summary of Notes Payable (Parenthetical) (Details) $ in Millions, ¥ in Billions	Mar. 31, 2017 USD ($)	Mar. 31, 2017 JPY (¥)	Feb. 28, 2017	Jan. 31, 2017 JPY (¥)	Dec. 31, 2016 JPY (¥)
2.65% senior notes paid February 2017
Debt Instrument [Line Items]
Debt instrument, interest rate			2.65%		2.65%
2.40% senior notes due March 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	2.40%	2.40%			2.40%
Debt instrument, principal amount	$ 550
4.00% senior notes due February 2022
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%			4.00%
Debt instrument, principal amount	$ 350
3.625% senior notes due June 2023
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%			3.625%
Debt instrument, principal amount	$ 700
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%			3.625%
Debt instrument, principal amount	$ 750
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	3.25%	3.25%			3.25%
Debt instrument, principal amount	$ 450
2.875% senior notes due October 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	2.875%	2.875%			2.875%
6.90% senior notes due December 2039
Debt Instrument [Line Items]
Debt instrument, interest rate	6.90%	6.90%			6.90%
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Debt instrument, interest rate	6.45%	6.45%			6.45%
4.00% senior notes due October 2046
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%			4.00%
5.50% subordinated notes due September 2052
Debt Instrument [Line Items]
Debt instrument, interest rate	5.50%	5.50%			5.50%
Debt instrument, principal amount	$ 500
.932% senior notes due January 2027
Debt Instrument [Line Items]
Debt instrument, interest rate	0.932%	0.932%		0.932%
Debt instrument, principal amount | ¥		¥ 60.0		¥ 60.0
Yen-denominated loan variable interest rate due September 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	0.31%	0.31%			0.31%
Debt instrument, principal amount | ¥		¥ 5.0			¥ 5.0
Yen-denominated loan variable interest rate due September 2023
Debt Instrument [Line Items]
Debt instrument, interest rate	0.46%	0.46%			0.46%
Debt instrument, principal amount | ¥		¥ 25.0			¥ 25.0

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SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Common Stock Issued [Roll Forward]
Balance, beginning of period	671,249	669,723
Exercise of stock options and issuance of restricted shares	434	678
Balance, end of period	671,683	670,401
Treasury Stock [Roll Forward]
Balance, beginning of period	265,439	245,343
Balance, end of period	273,681	255,198
Shares outstanding, end of period	398,002	415,203
Treasury Stock
Treasury Stock [Roll Forward]
Stock Acquired In Open Market, Shares	8,493	10,152
Other purchases	144	189
Shares issued to AFL Stock Plan	(247)	(311)
Exercise of stock options	(128)	(64)
Other dispositions	(20)	(111)

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SHAREHOLDERS' EQUITY - Anti-Dilutive Share-Based Awards Excluded from Calculation of Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stockholders' Equity Note [Abstract]
Anti-dilutive share-based awards	321	2,682

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SHAREHOLDERS' EQUITY - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stockholders Equity Note [Line Items]
Common stock, share repurchase, dollar amount	$ 610	$ 612
Remaining common stock available for purchase under share repurchase authorizations	18.3
Share Repurchase Program
Stockholders Equity Note [Line Items]
Stock Acquired In Open Market, Shares	8.5	10.2
Common stock, share repurchase, dollar amount	$ 600	$ 600

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SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	[1]	$ 2,630	$ 625
Other comprehensive income loss before reclassifications net of tax	[1]	(10)	2,361
Amounts reclassified from accumulated other comprehensive income net of tax	[1]	12	(50)
Other comprehensive income (loss), net of tax	[1]	2	2,311
Balance, end of period	[1]	2,632	2,936
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	[1]	(1,983)	(2,196)
Other comprehensive income loss before reclassifications net of tax	[1]	333	612
Amounts reclassified from accumulated other comprehensive income net of tax	[1]	0	0
Other comprehensive income (loss), net of tax	[1]	333	612
Balance, end of period	[1]	(1,650)	(1,584)
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	[1]	4,805	2,986
Other comprehensive income loss before reclassifications net of tax	[1]	(341)	1,748
Amounts reclassified from accumulated other comprehensive income net of tax	[1]	10	(50)
Other comprehensive income (loss), net of tax	[1]	(331)	1,698
Balance, end of period	[1]	4,474	4,684
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	[1]	(24)	(26)
Other comprehensive income loss before reclassifications net of tax	[1]	2	2
Amounts reclassified from accumulated other comprehensive income net of tax	[1]	0	0
Other comprehensive income (loss), net of tax	[1]	2	2
Balance, end of period	[1]	(22)	(24)
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	[1]	(168)	(139)
Other comprehensive income loss before reclassifications net of tax	[1]	(4)	(1)
Amounts reclassified from accumulated other comprehensive income net of tax	[1]	2	0
Other comprehensive income (loss), net of tax	[1]	(2)	(1)
Balance, end of period	[1]	$ (170)	$ (140)

[1] All amounts in the table above are net of tax.

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SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions		$ (7)	$ 91
Other than temporary impairment losses realized		(10)	(14)
Total before tax		898	1,117
Income tax (expense) or benefit		(306)	(386)
Net of tax		$ 592	$ 731
The expected U.S. tax rate		35.00%	35.00%
Reclassification Out Of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax		$ (12)	$ 50
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on investment securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions		(6)	91
Other than temporary impairment losses realized		(10)	(14)
Total before tax		(16)	77
Income tax (expense) or benefit	[1]	6	(27)
Net of tax		(10)	50
Reclassification Out Of Accumulated Other Comprehensive Income | Pension liability adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Acquisition and operating expenses, actuarial gains (losses)	[2]	(3)	(3)
Acquisition and operating expenses, prior service (cost) credit	[2]	0	3
Income tax (expense) or benefit	[1]	1	0
Net of tax		$ (2)	$ 0

[1] Based on 35% tax rate

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details).

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SHARE-BASED COMPENSATION - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock options exercised		$ 17	$ 10
Tax benefit from stock options exercised		$ 14	$ 13
2004 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, maximum number of shares issuable		25,000
Share-based compensation arrangement by share-based payment award, maximum number of shares issuable other than options and stock appreciation rights		12,000
Shares available for future grants under the long-term incentive plan		8,000
Long-term incentive plan awards, term (in years)		10 years
Long-term incentive plan awards, vesting period		3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost not yet recognized, restricted stock awards		$ 62
Total compensation cost not yet recognized, restricted stock awards, shares		1,916		1,868
Total compensation cost not yet recognized, restricted stock awards, weighted-average period (in years)		1 year 8 months 12 days
Restricted stock awards, grants in period		489
Performance based Vesting Condition | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost not yet recognized, restricted stock awards		$ 29
Total compensation cost not yet recognized, restricted stock awards, shares		973
Restricted stock awards, grants in period	253

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SHARE-BASED COMPENSATION - Stock Options Outstanding and Exercisable (Detail) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Outstanding - Stock Option Shares | shares	6,245
Options Outstanding - Weighted-Average Remaining Term (Yrs)	4 years 10 months 24 days
Options Outstanding - Aggregate Intrinsic Value | $	$ 119
Options Outstanding - Weighted-Average Exercise Price Per Share | $ / shares	$ 53.38
Options Exercisable - Stock Option Shares | shares	4,504
Options Exercisable - Weighted-Average Remaining Term (Yrs.)	3 years 4 months 24 days
Options Exercisable - Aggregate Intrinsic Value | $	$ 102
Options Exercisable - Weighted-Average Exercise Price Per Share | $ / shares	$ 49.72

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SHARE-BASED COMPENSATION - Restricted Stock Activity (Details) - Restricted Stock shares in Thousands	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Shares
Beginning Balance | shares	1,868
Granted | shares	489
Canceled | shares	(4)
Vested | shares	(437)
Ending Balance | shares	1,916
Weighted-Average Grant-Date Fair Value Per Share
Beginning Balance | $ / shares	$ 61.76
Granted | $ / shares	71.97
Cancelled | $ / shares	65.05
Vested | $ / shares	62.23
Ending Balance | $ / shares	$ 64.12

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BENEFIT PLANS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount of years active employees have left to meet rule of 80 in order to be eligible for postretirement medical benefits		5 years
Amount of years left to meet 15 year service requirement for active employees age 55 or older to be eligible for postretirement medical benefits		5 years
Lower Limit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care plan, retirement age for eligibility, (in years)		55 years
Health care plan, number of years of service for eligibility		15 years
Health care plan, retirement age and years of service combined years for eligibility (rule of 80)		80 years
Japanese Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 6
U.S. Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 0

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BENEFIT PLANS - Net Periodic (Benefit) Cost Included in Acquisition and Operating Expenses (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Japanese Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 5	$ 4
Interest cost	1	2
Expected return on plan assets	(1)	(1)
Amortization of net actuarial loss	0	0
Amortization of prior service cost (credit)	0	0
Net periodic (benefit) cost	5	5
U.S. Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	6	6
Interest cost	8	8
Expected return on plan assets	(6)	(6)
Amortization of net actuarial loss	3	3
Amortization of prior service cost (credit)	0	0
Net periodic (benefit) cost	11	11
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0
Interest cost	0	0
Expected return on plan assets	0	0
Amortization of net actuarial loss	0	0
Amortization of prior service cost (credit)	0	(3)
Net periodic (benefit) cost	$ 0	$ (3)

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COMMITMENTS AND CONTINGENT LIABILITIES - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Other Commitments [Line Items]
Loss contingency accrual, insurance-related assessment, discount rate	4.25%
Loss contingency, discounted amount of insurance-related assessment liability	$ 62
Loss contingency, undiscounted amount of insurance-related assessment liability	94
Loss contingency, insurance-related assessment, discounted amount of premium tax offset	48
Loss contingency, insurance-related assessment, undiscounted amount of premium tax offset	$ 74
Loss contingency, discounted amount of insurance-related assessment liability, payment period (in years)	1
Loss contingency, discounted amount of insurance-related assessment liability, realization period for associated asset offsets (in years)	5
Loss contingency, loss in period	$ 14