10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

RQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF

1934

For the quarterly period ended June 30, 2012

or

o 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: 1-16095

Aetna Inc.

(Exact name of registrant as specified in its charter)

Pennsylvania (State or other jurisdiction of incorporation or organization)	23-2229683 (I.R.S. Employer Identification No.)
151 Farmington Avenue, Hartford, CT (Address of principal executive offices)	06156 (Zip Code)
Registrant's telephone number, including area code:	(860) 273-0123

Former name, former address and former fiscal year, if changed since last report: N/A

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. þYesoNo

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, 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).

þYesoNo

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

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

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

There were 334.2 million shares of the registrant's voting common stock with a par value of $.01 per share outstanding at June 30, 2012.

Aetna Inc.

Form 10-Q

For the Quarterly Period Ended June 30, 2012

Unless the context otherwise requires, references to the terms “we”, “our” or “us” used throughout this Quarterly Report on Form 10-Q (except the Report of Independent Registered Public Accounting Firm on page 27), refer to Aetna Inc. (a Pennsylvania corporation) (“Aetna”) and its subsidiaries (collectively, the “Company”).

Table of Contents		Page
Part I	Financial Information
Item 1.	Financial Statements	1
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	42
Item 4.	Controls and Procedures	42
Part II	Other Information
Item 1.	Legal Proceedings	43
Item 1A.	Risk Factors	43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	43
Item 4.	Mine Safety Disclosures	43
Item 6.	Exhibits	44
Signatures		45
Index to Exhibits		46

Part I. Financial Information

Item 1. Financial Statements

Consolidated Statements of Income

(Unaudited)

	For the Three Months				For the Six Months
	Ended June 30,				Ended June 30,
(Millions, except per common share data)	2012		2011		2012		2011
Revenue:
Health care premiums	$	7,167.9	$	6,733.4	$	14,355.3	$	13,484.0
Other premiums	468.7		451.8		945.1		897.1
Fees and other revenue (1)	967.1		896.5		1,926.8		1,796.1
Net investment income	222.8		241.3		463.4		493.9
Net realized capital gains	8.6		21.4		60.3		61.1
Total revenue	8,835.1		8,344.4		17,750.9		16,732.2
Benefits and expenses:
Health care costs (2)	5,908.3		5,366.8		11,765.8		10,714.8
Current and future benefits	483.3		477.7		994.2		963.2
Operating expenses:
Selling expenses	271.4		267.2		547.7		557.9
General and administrative expenses	1,375.0		1,324.5		2,764.7		2,597.3
Total operating expenses	1,646.4		1,591.7		3,312.4		3,155.2
Interest expense	64.4		61.5		123.7		127.6
Amortization of other acquired intangible assets	37.0		25.6		74.8		51.9
Total benefits and expenses	8,139.4		7,523.3		16,270.9		15,012.7
Income before income taxes	695.7		821.1		1,480.0		1,719.5
Income taxes:
Current	182.0		226.7		456.5		564.0
Deferred	56.1		57.7		54.9		32.8
Total income taxes	238.1		284.4		511.4		596.8
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7
Earnings per common share:
Basic	$	1.34	$	1.42	$	2.80	$	2.94
Diluted	$	1.32	$	1.39	$	2.76	$	2.88

⁽¹⁾  Fees and other revenue include administrative services contract member co-payments and plan sponsor reimbursements related to our mail order and specialty pharmacy operations of $20.7 million and $39.5 million (net of pharmaceutical and processing costs of $294.3 million and $579.8 million) for the three and six months ended June 30, 2012, respectively, and $14.4 million and $30.0 million (net of pharmaceutical and processing costs of $311.6 million and $620.9 million) for the three and six months ended June 30, 2011, respectively.

⁽²⁾   Health care costs have been reduced by Insured member co-payments related to our mail order and specialty pharmacy operations of $31.1 million and $68.0 million for the three and six months ended June 30, 2012, respectively, and $32.5 million and $69.6 million for the three and six months ended June 30, 2011, respectively.

Refer to accompanying Condensed Notes to Consolidated Financial Statements (Unaudited).

Page 1

Consolidated Statements of Comprehensive Income

(Unaudited)

	For the Three Months						For the Six Months
	Ended June 30,						Ended June 30,
(Millions)	2012			2011			2012			2011
Net income	$	457.6		$	536.7		$	968.6		$	1,122.7
Other comprehensive income (loss), net of tax:
Previously impaired debt securities (1) :
Net unrealized gains
($8.8, $3.7, $4.0 and $3.2 pretax)	5.7			2.4			2.6			2.1
Less: reclassification of gains to earnings
($10.2, $8.7, $5.1 and $22.2 pretax)	6.6			5.6			3.3			14.4
Total previously impaired debt securities (1)	(.9		)	(3.2		)	(.7		)	(12.3		)
All other securities:
Net unrealized gains
($148.5, $179.8, $239.5 and $158.0 pretax)	96.6			116.9			155.7			102.7
Less: reclassification of gains to earnings
($16.2, $38.6, $68.9 and $58.8 pretax)	10.5			25.0			44.8			38.2
Total all other securities	86.1			91.9			110.9			64.5
Foreign currency and derivatives:
Net unrealized losses
($(7.2), $(8.3), $(.6) and $(5.7) pretax)	(4.7		)	(5.4		)	(.4		)	(3.7		)
Less: reclassification of losses to earnings
($(1.2), $(1.1), $(2.3) and $(2.1) pretax)	(.8		)	(.8		)	(1.5		)	(1.4		)
Total foreign currency and derivatives	(3.9		)	(4.6		)	1.1			(2.3		)
Pension and OPEB plans:
Amortization of net actuarial losses
($(18.8), $(15.8), $(37.4) and $(31.6) pretax)	12.1			10.2			24.3			20.5
Amortization of prior service cost
($1.0, $.9, $2.0 and $2.0 pretax)	(.6		)	(.6		)	(1.3		)	(1.3		)
Other comprehensive income	92.8			93.7			134.3			69.1
Comprehensive income	$	550.4		$	630.4		$	1,102.9		$	1,191.8

⁽¹⁾  Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

Refer to accompanying Condensed Notes to Consolidated Financial Statements (Unaudited).

Page 2

Consolidated Balance Sheets

	(Unaudited)
(Millions)	At June 30, 2012			At December 31, 2011
Assets:
Current assets:
Cash and cash equivalents	$	922.1		$	679.7
Investments	2,347.0			2,211.8
Premiums receivable, net	866.8			761.4
Other receivables, net	759.1			701.5
Accrued investment income	188.2			195.8
Income taxes receivable	79.6			161.9
Deferred income taxes	370.7			387.2
Other current assets	941.2			790.7
Total current assets	6,474.7			5,890.0
Long-term investments	18,331.0			18,083.2
Reinsurance recoverables	903.4			921.7
Goodwill	6,202.2			6,203.9
Other acquired intangible assets, net	885.3			958.6
Property and equipment, net	542.2			556.9
Other long-term assets	792.8			760.6
Separate Accounts assets	5,321.1			5,218.2
Total assets	$	39,452.7		$	38,593.1
Liabilities and shareholders' equity:
Current liabilities:
Health care costs payable	$	2,883.5		$	2,675.5
Future policy benefits	661.5			668.0
Unpaid claims	611.2			581.2
Unearned premiums	839.6			369.7
Policyholders' funds	1,268.1			1,281.6
Short-term debt	—			425.9
Accrued expenses and other current liabilities	2,171.2			2,520.3
Total current liabilities	8,435.1			8,522.2
Future policy benefits	6,051.2			6,092.8
Unpaid claims	1,529.9			1,505.8
Policyholders' funds	1,295.4			1,351.6
Long-term debt	4,706.3			3,977.7
Deferred income taxes	341.0			208.8
Other long-term liabilities	1,516.9			1,595.8
Separate Accounts liabilities	5,321.1			5,218.2
Total liabilities	29,196.9			28,472.9
Commitments and contingencies (Note 12)
Shareholders' equity:
Common stock ($.01 par value; 2.6 billion shares authorized and 334.2 million shares issued
and outstanding in 2012; 2.6 billion shares authorized and 349.7 million shares issued and
outstanding in 2011) and additional paid-in capital	1,039.8			962.8
Retained earnings	10,270.9			10,346.6
Accumulated other comprehensive loss	(1,054.9		)	(1,189.2		)
Total shareholders' equity	10,255.8			10,120.2
Total liabilities and shareholders' equity	$	39,452.7		$	38,593.1

Refer to accompanying Condensed Notes to Consolidated Financial Statements (Unaudited).

Page 3

Consolidated Statements of Shareholders’ Equity

(Unaudited)

(Millions)	Number of Common Shares Outstanding		Common Stock and Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Loss			Total Shareholders' Equity
Six Months Ended June 30, 2012
Balance at December 31, 2011	349.7		$	962.8		$	10,346.6		$	(1,189.2	)	$	10,120.2
Net income	—		—			968.6			—			968.6
Other comprehensive income (Note 6)	—		—			—			134.3			134.3
Common shares issued for benefit plans,
including tax benefits	5.7		77.2			—			—			77.2
Repurchases of common shares	(21.2	)	(.2		)	(924.3		)	—			(924.5		)
Dividends declared	—		—			(120.0		)	—			(120.0		)
Balance at June 30, 2012	334.2		$	1,039.8		$	10,270.9		$	(1,054.9	)	$	10,255.8
Six Months Ended June 30, 2011
Balance at December 31, 2010	384.4		$	651.5		$	10,401.9		$	(1,162.6	)	$	9,890.8
Net income	—		—			1,122.7			—			1,122.7
Other comprehensive income (Note 6)	—		—			—			69.1			69.1
Common shares issued for benefit plans,
including tax benefits	6.4		189.7			—			—			189.7
Repurchases of common shares	(17.9	)	(.2		)	(734.8		)	—			(735.0		)
Dividends declared	—		—			(113.8		)	—			(113.8		)
Balance at June 30, 2011	372.9		$	841.0		$	10,676.0		$	(1,093.5	)	$	10,423.5

Refer to accompanying Condensed Notes to Consolidated Financial Statements (Unaudited).

Page 4

Consolidated Statements of Cash Flows

(Unaudited)

	Six Months Ended
	June 30,
(Millions)	2012			2011
Cash flows from operating activities:
Net income	$	968.6		$	1,122.7
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized capital gains	(60.3		)	(61.1		)
Depreciation and amortization	226.7			214.9
Equity in earnings of affiliates, net	(11.3		)	(24.5		)
Stock-based compensation expense	64.5			74.7
Amortization (Accretion) of net investment premium (discount)	8.9			(2.6		)
Changes in assets and liabilities:
Accrued investment income	7.6			(1.2		)
Premiums due and other receivables	(139.8		)	(313.0		)
Income taxes	108.6			168.7
Other assets and other liabilities	(559.1		)	(189.0		)
Health care and insurance liabilities	492.9			(103.4		)
Other, net	2.7			10.3
Net cash provided by operating activities	1,110.0			896.5
Cash flows from investing activities:
Proceeds from sales and maturities of investments	5,620.0			4,947.1
Cost of investments	(5,582.7		)	(5,046.5		)
Additions to property, equipment and software	(150.8		)	(137.1		)
Cash used for acquisition, net of cash acquired	—			(1,098.2		)
Net cash used for investing activities	(113.5		)	(1,334.7		)
Cash flows from financing activities:
Net repayment of long-term debt	—			(900.0		)
Net issuance of long-term debt	712.9			480.1
Net (repayment) issuance of short-term debt	(425.9		)	549.8
Deposits and interest credited for investment contracts	2.7			2.6
Withdrawals of investment contracts	(12.8		)	(5.3		)
Common shares under benefit plans, net	(18.5		)	96.6
Stock-based compensation tax benefits	30.3			15.3
Common shares repurchased	(924.5		)	(701.0		)
Dividends paid to shareholders	(122.1		)	(57.0		)
Collateral on interest rate swaps	3.8			—
Net cash used for financing activities	(754.1		)	(518.9		)
Net increase (decrease) in cash and cash equivalents	242.4			(957.1		)
Cash and cash equivalents, beginning of period	679.7			1,867.6
Cash and cash equivalents, end of period	$	922.1		$	910.5
Supplemental cash flow information:
Interest paid	$	117.0		$	136.4
Income taxes paid	371.3			413.6

Refer to accompanying Condensed Notes to Consolidated Financial Statements (Unaudited).

Page 5

Condensed Notes to Consolidated Financial Statements

(Unaudited)

1. Organization

We conduct our operations in three business segments:

• Health Care consists of medical, pharmacy benefit management services, dental, behavioral health and vision plans offered on both an Insured basis (where we assume all or a majority of the risk for medical and dental care costs) and an employer-funded basis (where the plan sponsor under an administrative services contract (“ASC”) assumes all or a majority of this risk). Medical products include point-of-service (“POS”), preferred provider organization (“PPO”), health maintenance organization (“HMO”) and indemnity benefit plans. Medical products also include health savings accounts ("HSAs") and Aetna HealthFund^®, consumer-directed health plans that combine traditional POS or PPO and/or dental coverage, subject to a deductible, with an accumulating benefit account (which may be funded by the plan sponsor and/or the member in the case of HSAs). We also offer Medicare and Medicaid products and services, as well as specialty products, such as health information technology services, medical management and data analytics services, medical stop loss insurance, and products that provide access to our provider network in select geographies.

• Group Insurance primarily includes group life insurance products offered on an Insured basis, including basic and supplemental group term life, group universal life, supplemental or voluntary programs and accidental death and dismemberment coverage. Group Insurance also includes (i) group disability products offered to employers on both an Insured and an ASC basis which consist primarily of short-term and long-term disability insurance (and products which combine both), (ii) absence management services offered to employers, which include short-term and long-term disability administration and leave management, and (iii) long-term care products that were offered primarily on an Insured basis, which provide benefits covering the cost of care in private home settings, adult day care, assisted living or nursing facilities. We no longer solicit or accept new long-term care customers.

• Large Case Pensions manages a variety of retirement products (including pension and annuity products) primarily for tax qualified pension plans. These products provide a variety of funding and benefit payment distribution options and other services. Large Case Pensions also includes certain discontinued products (refer to Note 15 beginning on page 25 for additional information).

2. Summary of Significant Accounting Policies

Interim Financial Statements

These interim financial statements necessarily rely on estimates, including assumptions as to annualized tax rates.  In the opinion of management, all adjustments necessary for a fair statement of results for the interim periods have been made.  All such adjustments are of a normal, recurring nature.  The accompanying unaudited consolidated financial statements and related notes should be read in conjunction with the consolidated financial statements and related notes presented in our 2011 Annual Report on Form 10-K (our “2011 Annual Report”).  Certain financial information that is normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), but that is not required for interim reporting purposes, has been condensed or omitted.  We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2011 Annual Report, unless the information contained in those disclosures materially changed and is required by GAAP.  We evaluated subsequent events that occurred after June 30, 2012 through the date the financials were issued and determined there were no other items to disclose.    

Page 6

Principles of Consolidation

These unaudited consolidated financial statements have been prepared in accordance with GAAP and include the accounts of Aetna and the subsidiaries that we control.  All significant intercompany balances have been eliminated in consolidation.

New Accounting Standards

Testing Goodwill for Impairment

Effective January 1, 2012, we adopted new accounting guidance for testing goodwill for impairment. Under this guidance, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of our Health Care or Group Insurance segment is less than its carrying value. If we determine that the fair value is likely greater than its carrying value, then no additional analysis is necessary, as the goodwill is not impaired. The adoption of this new guidance did not have an impact on our financial position or operating results.

Presentations of Comprehensive Income

Effective January 1, 2012, we adopted new presentation requirements for other comprehensive income in financial statements.  Under this new guidance, we have presented comprehensive income as a separate statement immediately following the statement of income.  This change in presentation did not have an impact on our financial position or operating results.

Fair Value Measurements

Effective January 1, 2012, we adopted new guidance relating to fair value measurements.  This new guidance amended and clarified certain existing fair value measurement principles and required additional disclosures for all Level 3 assets, including a qualitative discussion about the sensitivity of Level 3 fair value measurements.  The new requirements did not have an impact on our financial position or operating results.

Reconsideration of Effective Control for Repurchase Agreements

Effective January 1, 2012, we adopted new guidance relating to repurchase agreements and other agreements that entitle and obligate a transferor to repurchase or redeem financial assets before maturity.  The guidance prescribes when an entity may recognize a sale upon the transfer of financial assets subject to repurchase agreements.  Since we treat these transactions as collateralized borrowings rather than sales, the adoption of this accounting guidance did not have an impact on our financial position or operating results.

Deferred Acquisition Costs

Effective January 1, 2012, we prospectively adopted new guidance for costs associated with acquiring or renewing insurance contracts. This guidance clarified that such costs qualify for capitalization when directly related to the successful acquisition of new and renewed insurance contracts. We capitalized an immaterial amount of acquisition costs in 2011, all of which related to acquisition costs incurred subsequent to the acquisition of the Medicare Supplement business and related blocks of in-force business from Genworth in the fourth quarter of 2011. As a result, the amount of costs that would have been capitalized in 2011 if this new guidance were applied is immaterial.

Future Application of Accounting Standards

Fees Paid to the Federal Government by Health Insurers

Effective January 1, 2014, we will adopt new accounting guidance relating to the recognition and income statement reporting of any mandated fees to be paid to the federal government by health insurers. This guidance will apply primarily to new fees enacted in the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, "Health Care Reform"). The mandated fees may be material, and this new accounting guidance will result in the recognition of this expense on a straight-line basis beginning in 2014.

Page 7

3. Earnings Per Common Share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during the reporting period.  Diluted EPS is computed in a similar manner, except that the weighted average number of common shares outstanding is adjusted for the dilutive effects of our outstanding stock-based compensation awards, but only if the effect is dilutive.

The computations of basic and diluted EPS for the three and six months ended June 30, 2012 and 2011 are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions, except per common share data)	2012		2011		2012		2011
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7
Weighted average shares used to compute basic EPS	341.7		379.2		346.0		381.3
Dilutive effect of outstanding stock-based compensation awards (1)	4.5		8.1		5.5		7.9
Weighted average shares used to compute diluted EPS	346.2		387.3		351.5		389.2
Basic EPS	$	1.34	$	1.42	$	2.80	$	2.94
Diluted EPS	$	1.32	$	1.39	$	2.76	$	2.88

⁽¹⁾  Stock-based compensation awards are not included in the calculation of diluted EPS if the exercise price is greater than the average market price of Aetna common shares during the period (i.e., the awards are anti-dilutive).  Approximately 7.5 million and 7.4 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2012, respectively, and 12.6 million and 12.8 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2011, respectively, because they were anti-dilutive.

4.     Operating Expenses

For the three and six months ended June 30, 2012 and 2011, selling expenses (which include broker commissions, the variable component of our internal sales force compensation and premium taxes) and general and administrative expenses were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Selling expenses	$	271.4	$	267.2	$	547.7	$	557.9
General and administrative expenses:
Salaries and related benefits	754.2		786.8		1,556.3		1,550.6
Other general and administrative expenses	620.8		537.7		1,208.4		1,046.7
Total general and administrative expenses	1,375.0		1,324.5		2,764.7		2,597.3
Total operating expenses	$	1,646.4	$	1,591.7	$	3,312.4	$	3,155.2

5.     Investments

Total investments at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012						December 31, 2011
(Millions)	Current		Long-term		Total		Current		Long-term		Total
Debt and equity securities available for sale	$	2,217.3	$	15,469.4	$	17,686.7	$	2,168.1	$	15,222.7	$	17,390.8
Mortgage loans	125.6		1,498.3		1,623.9		41.7		1,606.8		1,648.5
Other investments	4.1		1,363.3		1,367.4		2.0		1,253.7		1,255.7
Total investments	$	2,347.0	$	18,331.0	$	20,678.0	$	2,211.8	$	18,083.2	$	20,295.0

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Debt and Equity Securities

Debt and equity securities available for sale at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses				Fair Value
June 30, 2012
Debt securities:
U.S. government securities	$	1,542.1	$	168.8	$	(.6	)		$	1,710.3
States, municipalities and political subdivisions	2,662.6		242.5		(2.2		)		2,902.9
U.S. corporate securities	6,269.8		764.3		(6.2		)		7,027.9
Foreign securities	2,695.7		312.3		(21.0		)		2,987.0
Residential mortgage-backed securities	945.3		53.7		(.1		)		998.9
Commercial mortgage-backed securities	1,259.3		121.7		(3.3		)	(1)	1,377.7
Other asset-backed securities	480.8		25.0		(3.3		)	(1)	502.5
Redeemable preferred securities	125.8		10.8		(8.8		)		127.8
Total debt securities	15,981.4		1,699.1		(45.5		)		17,635.0
Equity securities	47.3		10.4		(6.0		)		51.7
Total debt and equity securities (2)	$	16,028.7	$	1,709.5	$	(51.5	)		$	17,686.7
December 31, 2011
Debt securities:
U.S. government securities	$	1,394.7	$	165.0	$	(.4	)		$	1,559.3
States, municipalities and political subdivisions	2,654.9		208.5		(3.3		)		2,860.1
U.S. corporate securities	6,484.0		718.2		(28.1		)		7,174.1
Foreign securities	2,614.9		278.2		(38.0		)		2,855.1
Residential mortgage-backed securities	849.8		51.1		(.1		)		900.8
Commercial mortgage-backed securities	1,295.3		98.3		(5.8		)	(1)	1,387.8
Other asset-backed securities	437.0		20.6		(3.8		)	(1)	453.8
Redeemable preferred securities	164.2		12.6		(14.5		)		162.3
Total debt securities	15,894.8		1,552.5		(94.0		)		17,353.3
Equity securities	40.3		5.0		(7.8		)		37.5
Total debt and equity securities (2)	$	15,935.1	$	1,557.5	$	(101.8	)		$	17,390.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, we held securities for which we previously recognized $25.2 million and $27.6 million, respectively, of non-credit related impairments in accumulated other comprehensive loss. These securities had a net unrealized capital gain at June 30, 2012 and December 31, 2011 of $7.7 million and $7.4 million, respectively.

⁽²⁾  Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products).  At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products.  Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

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The fair value of debt securities at June 30, 2012 is shown below by contractual maturity.  Actual maturities may differ from contractual maturities because securities may be restructured, called or prepaid.

(Millions)	Fair Value
Due to mature:
Less than one year	$	871.7
One year through five years	3,641.4
After five years through ten years	5,065.9
Greater than ten years	5,176.9
Residential mortgage-backed securities	998.9
Commercial mortgage-backed securities	1,377.7
Other asset-backed securities	502.5
Total	$	17,635.0

Mortgage-Backed and Other Asset-Backed Securities

All of our residential mortgage-backed securities at June 30, 2012 were issued by the Government National Mortgage Association, the Federal National Mortgage Association or the Federal Home Loan Mortgage Corporation and carry agency guarantees and explicit or implicit guarantees by the U.S. Government.  At June 30, 2012, our residential mortgage-backed securities had an average quality rating of AAA and a weighted average duration of 1.7 years.

Our commercial mortgage-backed securities have underlying loans that are dispersed throughout the U.S.  Significant market observable inputs used to value these securities include probability of default and loss severity.  At June 30, 2012, these securities had an average quality rating of AA+ and a weighted average duration of 3.4 years.

Our other asset-backed securities have a variety of underlying collateral (e.g., automobile loans, credit card receivables and home equity loans).  Significant market observable inputs used to value these securities include the unemployment rate, loss severity and probability of default.  At June 30, 2012, these securities had an average quality rating of AA+ and a weighted average duration of 3.4 years.

Unrealized Capital Losses and Net Realized Capital Gains (Losses)

When a debt or equity security is in an unrealized capital loss position, we monitor the duration and severity of the loss to determine if sufficient market recovery can occur within a reasonable period of time.  We recognize an other-than-temporary impairment (“OTTI”) when we intend to sell a debt security that is in an unrealized capital loss position or if we determine a credit-related loss on a debt or equity security has occurred.

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Summarized below are the debt and equity securities we held at June 30, 2012 and December 31, 2011 that were in an unrealized capital loss position, aggregated by the length of time the investments have been in that position:

	Less than 12 months				Greater than 12 months				Total (1)
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2012
Debt securities:
U.S. government securities	$	58.3	$	.2	$	15.1	$	.4	$	73.4	$	.6
States, municipalities and political subdivisions	119.9		.7		43.4		1.5		163.3		2.2
U.S. corporate securities	296.8		4.4		30.4		1.8		327.2		6.2
Foreign securities	213.5		10.2		61.2		10.8		274.7		21.0
Residential mortgage-backed securities	5.3		—		2.4		.1		7.7		.1
Commercial mortgage-backed securities	14.8		.3		57.6		3.0		72.4		3.3
Other asset-backed securities	12.1		.1		1.6		3.2		13.7		3.3
Redeemable preferred securities	4.0		—		24.5		8.8		28.5		8.8
Total debt securities	724.7		15.9		236.2		29.6		960.9		45.5
Equity securities	11.7		.6		22.8		5.4		34.5		6.0
Total debt and equity securities (1)	$	736.4	$	16.5	$	259.0	$	35.0	$	995.4	$	51.5
December 31, 2011
Debt securities:
U.S. government securities	$	14.0	$	—	$	15.1	$	.4	$	29.1	$	.4
States, municipalities and political subdivisions	23.8		.4		68.6		2.9		92.4		3.3
U.S. corporate securities	625.5		25.7		62.4		2.4		687.9		28.1
Foreign securities	498.8		25.4		55.3		12.6		554.1		38.0
Residential mortgage-backed securities	.9		—		2.9		.1		3.8		.1
Commercial mortgage-backed securities	102.7		2.8		42.8		3.0		145.5		5.8
Other asset-backed securities	27.8		.1		3.9		3.7		31.7		3.8
Redeemable preferred securities	17.6		.9		34.5		13.6		52.1		14.5
Total debt securities	1,311.1		55.3		285.5		38.7		1,596.6		94.0
Equity securities	6.2		2.4		20.8		5.4		27.0		7.8
Total debt and equity securities (1)	$	1,317.3	$	57.7	$	306.3	$	44.1	$	1,623.6	$	101.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, debt and equity securities in an unrealized capital loss position of $30.5 million and $48.2 million, respectively, and with related fair value of $296.6 million and $446.1 million, respectively, related to experience-rated and discontinued products.

We reviewed the securities in the tables above and concluded that these are performing assets generating investment income to support the needs of our business.  In performing this review, we considered factors such as the quality of the investment security based on research performed by our internal credit analysts and external rating agencies and the prospects of realizing the carrying value of the security based on the investment’s current prospects for recovery.  At June 30, 2012, we did not have the intention to sell the debt securities that were in an unrealized capital loss position.

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The maturity dates for debt securities in an unrealized capital loss position at June 30, 2012 were as follows:

	Supporting discontinued and experience-rated products				Supporting remaining products				Total
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Due to mature:
Less than one year	$	—	$	—	$	13.1	$	.1	$	13.1	$	.1
One year through five years	22.0		.2		197.8		2.6		219.8		2.8
After five years through ten years	66.2		1.2		212.9		4.1		279.1		5.3
Greater than ten years	160.6		22.8		194.5		7.8		355.1		30.6
Residential mortgage-backed securities	—		—		7.7		.1		7.7		.1
Commercial mortgage-backed securities	13.0		.5		59.4		2.8		72.4		3.3
Other asset-backed securities	.6		—		13.1		3.3		13.7		3.3
Total	$	262.4	$	24.7	$	698.5	$	20.8	$	960.9	$	45.5

Net realized capital gains for the three and six months ended June 30, 2012 and 2011, excluding amounts related to experience-rated contract holders and discontinued products, were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
OTTI losses on debt securities	$	(2.0	)	$	(1.7	)	$	(8.6	)	$	(4.5	)
Portion of OTTI losses on debt securities recognized   in other comprehensive income	.1			—			.1			—
Net OTTI losses on debt securities recognized in earnings	(1.9		)	(1.7		)	(8.5		)	(4.5		)
Net realized capital gains, excluding OTTI losses on debt securities	10.5			23.1			68.8			65.6
Net realized capital gains	$	8.6		$	21.4		$	60.3		$	61.1

The net realized capital gains for the three and six months ended June 30, 2012 and 2011 were primarily attributable to the sale of debt securities, partially offset by losses from derivative transactions.

Excluding amounts related to experience-rated and discontinued products, proceeds from the sale of debt securities and the related gross realized capital gains and losses for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Proceeds on sales	$	1,075.5	$	1,577.5	$	2,815.3	$	3,091.9
Gross realized capital gains	41.0		55.4		104.9		109.2
Gross realized capital losses	5.4		6.3		11.3		25.1

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Mortgage Loans

Our mortgage loans are collateralized by commercial real estate.  During the three and six months ended June 30, 2012 and 2011 we had the following activity in our mortgage loan portfolio:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
New mortgage loans	$	22.6	$	52.8	$	60.5	$	128.5
Mortgage loans fully repaid	10.8		4.7		37.3		39.2
Mortgage loans foreclosed	16.7		—		16.7		—

At June 30, 2012 and December 31, 2011, we had no material problem, restructured or potential problem mortgage loans.  We also had no material impairment reserves on these loans at June 30, 2012 or December 31, 2011.

We assess our mortgage loans on a regular basis for credit impairments, and annually assign a credit quality indicator to each loan.  Our credit quality indicator is internally developed and categorizes our portfolio on a scale from 1 to 7.  Category 1 represents loans of superior quality, and Categories 6 and 7 represent loans where collections are at risk.  The vast majority of our mortgage loans fall into the Level 2 to 4 ratings.  These ratings represent loans where credit risk is minimal to acceptable; however, these loans may display some susceptibility to economic changes.  Category 5 represents loans where credit risk is not substantial but these loans warrant management’s close attention.  These indicators are based upon several factors, including current loan to value ratios, property condition, market trends, borrower quality and deal structure.  Based upon our most recent assessments at June 30, 2012 and December 31, 2011, our mortgage loans were given the following credit quality indicators:

(In Millions, except credit ratings indicator)	June 30, 2012		December 31, 2011
1	$	111.4	$	95.6
2 to 4	1,435.3		1,426.1
5	50.6		97.1
6 and 7	26.6		29.7
Total	$	1,623.9	$	1,648.5

Variable Interest Entities

In determining whether to consolidate a variable interest entity ("VIE"), we consider several factors including whether we have the power to direct activities, the obligation to absorb losses and the right to receive benefits that could potentially be significant to the VIE.  We have relationships with certain real estate partnerships and one hedge fund partnership that are considered VIEs, but are not consolidated.  We record the amount of our investment in these partnerships as long-term investments on our balance sheets and recognize our share of partnership income or losses in earnings.  Our maximum exposure to loss as a result of our investment in these partnerships is our investment balance at June 30, 2012 and December 31, 2011 of approximately $193 million and $175 million, respectively, and the risk of recapture of tax credits related to the real estate partnerships previously recognized, which we do not consider significant.  We do not have a future obligation to fund losses or debts on behalf of these investments; however, we may voluntarily contribute funds.  The real estate partnerships construct, own and manage low-income housing developments and had total assets of approximately $5.6 billion and $5.1 billion at June 30, 2012 and December 31, 2011, respectively.  The hedge fund partnership had total assets of approximately $6.8 billion and $5.9 billion at June 30, 2012 and December 31, 2011, respectively.

Page 13

Non-controlling (Minority) Interests

At June 30, 2012 and December 31, 2011, non-controlling interests were approximately $67 million and $71 million, respectively, primarily related to third party interests in our investment holdings.  The non-controlling entities’ share of these interests was included in accrued expenses and other current liabilities.  Net income attributable to these interests was approximately $.5 million and $1.5 million for the three and six months ended June 30, 2012, respectively, and $.8 million and $3.0 million for the three and six months ended June 30, 2011, respectively.  These non-controlling interests did not have a material impact on our financial position or operating results.

Net Investment Income

Sources of net investment income for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
Debt securities	$	191.8		$	212.1		$	388.7		$	423.4
Mortgage loans	26.9			24.6			65.5			49.3
Other investments	11.7			11.8			24.1			35.9
Gross investment income	230.4			248.5			478.3			508.6
Less: investment expenses	(7.6		)	(7.2		)	(14.9		)	(14.7		)
Net investment income (1)	$	222.8		$	241.3		$	463.4		$	493.9

⁽¹⁾  Net investment income includes $77.1 million and $157.8 million for the three and six months ended June 30, 2012, respectively, and $80.4 million and $167.0 million for the three and six months ended June 30, 2011, respectively, related to investments supporting our experience-rated and discontinued products.

6.    Other Comprehensive (Loss) Income

Shareholders’ equity included the following activity in accumulated other comprehensive loss (excluding amounts related to experience-rated contract holders and discontinued products) for the six months ended June 30, 2012 and 2011:

	Net Unrealized Gains (Losses)									Pension and OPEB Plans							Total Accumulated Other Comprehensive (Loss) Income
	Securities					Foreign Currency and Derivatives
(Millions)	Previously Impaired (1)			All Other					Unrecognized Net Actuarial Losses				Unrecognized Prior Service Cost
Six months ended June 30, 2012
Balance at December 31, 2011	$	58.2		$	595.2	$	(33.7	)		$	(1,834.6	)		$	25.7		$	(1,189.2	)
Other comprehensive (loss) income	(.7		)	110.9		1.1				24.3				(1.3		)	134.3
Balance at June 30, 2012	$	57.5		$	706.1	$	(32.6	)		$	(1,810.3	)		$	24.4		$	(1,054.9	)
Six months ended June 30, 2011
Balance at December 31, 2010	$	75.1		$	375.2	$	(27.3	)		$	(1,614.0	)		$	28.4		$	(1,162.6	)
Other comprehensive (loss) income	(12.3		)	64.5		(2.3		)		20.5				(1.3		)	69.1
Balance at June 30, 2011	$	62.8		$	439.7	$	(29.6	)		$	(1,593.5	)		$	27.1		$	(1,093.5	)

⁽¹⁾  Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

7.    Financial Instruments

The preparation of our consolidated financial statements in accordance with GAAP requires certain of our assets and liabilities to be reflected at their fair value, and others on another basis, such as an adjusted historical cost basis.  In this note, we provide details on the fair value of financial assets and liabilities and how we determine those fair values.  We present this information for those financial instruments that are measured at fair value for which the change in fair value impacts net income or other comprehensive income separately from other financial assets and liabilities.

Page 14

Financial Instruments Measured at Fair Value in our Balance Sheets

Certain of our financial instruments are measured at fair value in our balance sheets.  The fair values of these instruments are based on valuations that include inputs that can be classified within one of three levels of a hierarchy established by GAAP.  The following are the levels of the hierarchy and a brief description of the type of valuation information (“inputs”) that qualifies a financial asset or liability for each level:

◦ Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets.

◦ Level 2 – Inputs other than Level 1 that are based on observable market data.  These include: quoted prices for similar assets in active markets, quoted prices for identical assets in inactive markets, inputs that are observable that are not prices (such as interest rates and credit risks) and inputs that are derived from or corroborated by observable markets.

◦ Level 3 – Developed from unobservable data, reflecting our own assumptions.

Financial assets and liabilities are classified based upon the lowest level of input that is significant to the valuation.  When quoted prices in active markets for identical assets and liabilities are available, we use these quoted market prices to determine the fair value of financial assets and liabilities and classify these assets and liabilities as Level 1.  In other cases where a quoted market price for identical assets and liabilities in an active market is either not available or not observable, we estimate fair value using valuation methodologies based on available and observable market information or by using a matrix pricing model.  These financial assets and liabilities would then be classified as Level 2.  If quoted market prices are not available, we determine fair value using broker quotes or an internal analysis of each investment’s financial performance and cash flow projections.  Thus, financial assets and liabilities may be classified in Level 3 even though there may be some significant inputs that may be observable.

The following is a description of the valuation methodologies used for our financial assets and liabilities that are measured at fair value, including the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Debt Securities – Where quoted prices are available in an active market, our debt securities are classified in Level 1 of the fair value hierarchy.  Our Level 1 debt securities are comprised primarily of U.S. Treasury securities.  If Level 1 valuations are not available, the fair value is determined using models such as matrix pricing, which use quoted market prices of debt securities with similar characteristics, or discounted cash flows to estimate fair value.  We obtained one price for each of our Level 2 debt securities and did not adjust any of these prices at June 30, 2012 or December 31, 2011.

We also value certain debt securities using Level 3 inputs.  For Level 3 debt securities, fair values are determined by outside brokers or, in the case of certain private placement securities, are priced internally.  Outside brokers determine the value of these debt securities through a combination of their knowledge of the current pricing environment and market flows.  We obtained one non-binding broker quote for each of these Level 3 debt securities and did not adjust any of these quotes at June 30, 2012 or December 31, 2011.  The total fair value of our broker quoted securities was approximately $127 million at June 30, 2012 and $107 million at December 31, 2011.  Examples of these Level 3 debt securities include certain U.S. and foreign corporate securities and certain of our commercial mortgage-backed securities as well as other asset-backed securities.  For some of our private placement securities, our internal staff determines the value of these debt securities by analyzing spreads of corporate and sector indices as well as interest spreads of comparable public bonds.  Examples of these Level 3 debt securities include certain U.S. and foreign securities and certain tax-exempt municipal securities.

Equity Securities – We currently have two classifications of equity securities:  those that are publicly traded and those that are privately held.  Our publicly-traded securities are classified as Level 1 because quoted prices are available for these securities in an active market.  For privately-held equity securities, there is no active market; therefore, we classify these securities as Level 3 because we price these securities through an internal analysis of each investment’s financial statements and cash flow projections.

Page 15

Significant unobservable inputs consist of earnings and revenue multiples, discount for lack of marketability and comparability adjustments. An increase or decrease in any of these unobservable inputs would result in a change in the fair value measurement, which may be significant.

Derivatives – Where quoted prices are available in an active market, our derivatives are classified in Level 1 of the fair value hierarchy.  Certain of our derivative instruments are valued using models that primarily use market observable inputs and therefore are classified as Level 2 because they are traded in markets where quoted market prices are not readily available.

Financial assets and liabilities measured at fair value on a recurring basis in our balance sheets at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Debt securities:
U.S. government securities	$	1,427.5	$	282.8	$	—	$	1,710.3
States, municipalities and political subdivisions	—		2,901.3		1.6		2,902.9
U.S. corporate securities	—		6,968.9		59.0		7,027.9
Foreign securities	—		2,925.6		61.4		2,987.0
Residential mortgage-backed securities	—		998.9		—		998.9
Commercial mortgage-backed securities	—		1,351.7		26.0		1,377.7
Other asset-backed securities	—		471.3		31.2		502.5
Redeemable preferred securities	—		112.1		15.7		127.8
Total debt securities	1,427.5		16,012.6		194.9		17,635.0
Equity securities	18.4		—		33.3		51.7
Derivatives	2.2		1.9		—		4.1
Total	$	1,448.1	$	16,014.5	$	228.2	$	17,690.8
Liabilities:
Derivatives	$	—	$	.5	$	—	$	.5
December 31, 2011
Assets:
Debt securities:
U.S. government securities	$	1,307.0	$	252.3	$	—	$	1,559.3
States, municipalities and political subdivisions	—		2,858.4		1.7		2,860.1
U.S. corporate securities	—		7,122.5		51.6		7,174.1
Foreign securities	—		2,805.7		49.4		2,855.1
Residential mortgage-backed securities	—		900.8		—		900.8
Commercial mortgage-backed securities	—		1,358.3		29.5		1,387.8
Other asset-backed securities	—		419.4		34.4		453.8
Redeemable preferred securities	—		146.6		15.7		162.3
Total debt securities	1,307.0		15,864.0		182.3		17,353.3
Equity securities	.8		—		36.7		37.5
Derivatives	—		2.0		—		2.0
Total	$	1,307.8	$	15,866.0	$	219.0	$	17,392.8
Liabilities:
Derivatives	$	—	$	.1	$	—	$	.1

Page 16

There were no transfers between Levels 1 and 2 during the three or six months ended June 30, 2012 or 2011. Gross transfers out of Level 3 were $22.7 million during the three and six months ended June 30, 2012, and gross transfers into Level 3 were $1.8 million during the three and six months ended June 30, 2012. Gross transfers out of Level 3 primarily relate to equity securities that have been valued using quoted prices in an active market. There were no material transfers into or out of Level 3 during the three or six months ended June 30, 2011.

Financial Instruments Not Measured at Fair Value in our Balance Sheets

The following is a description of the valuation methodologies used for estimating the fair value of our financial assets and liabilities that are carried on our balance sheets at adjusted cost or contract value.

Mortgage loans: Fair values are estimated by discounting expected mortgage loan cash flows at market rates that reflect the rates at which similar loans would be made to similar borrowers.  These rates reflect our assessment of the credit quality and the remaining duration of the loans.  The fair value estimates of mortgage loans of lower credit quality, including problem and restructured loans, are based on the estimated fair value of the underlying collateral.

Investment contract liabilities:

•With a fixed maturity:  Fair value is estimated by discounting cash flows at interest rates currently

being offered by, or available to, us for similar contracts.

•Without a fixed maturity:  Fair value is estimated as the amount payable to the contract holder upon

demand.  However, we have the right under such contracts to delay payment of withdrawals that

may ultimately result in paying an amount different than that determined to be payable on demand.

Long-term debt:  Fair values are based on quoted market prices for the same or similar issued debt or, if no quoted market prices are available, on the current rates estimated to be available to us for debt of similar terms and remaining maturities.

The carrying value and estimated fair value classified by level of fair value hierarchy for certain of our financial instruments at June 30, 2012 was as follows:

	Carrying Value		Estimated Fair Value
(Millions)			Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Mortgage loans	$	1,623.9	$	—	$	—	$	1,675.2	$	1,675.2
Liabilities:
Investment contract liabilities:
With a fixed maturity	22.3		—		—		22.5		22.5
Without a fixed maturity	538.4		—		—		552.6		552.6
Long-term debt	4,706.3		—		5,592.3		—		5,592.3

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The carrying value and estimated fair value of certain of our financial instruments at December 31, 2011 was as follows:

	December 31, 2011
	Carrying		Estimated
(Millions)	Value		Fair Value
Assets:
Mortgage loans	$	1,648.5	$	1,703.7
Liabilities:
Investment contract liabilities:
With a fixed maturity	34.6		34.9
Without a fixed maturity	543.9		559.4
Long-term debt	3,977.7		4,643.1

Separate Accounts Measured at Fair Value in our Balance Sheets

Separate Accounts assets in our Large Case Pensions business represent funds maintained to meet specific objectives of contract holders.  Since contract holders bear the investment risk of these assets, a corresponding Separate Accounts liability has been established equal to the assets.  These assets and liabilities are carried at fair value.  Net investment income and capital gains and losses accrue directly to such contract holders.  The assets of each account are legally segregated and are not subject to claims arising from our other businesses.  Deposits, withdrawals, net investment income and realized and unrealized capital gains and losses on Separate Accounts assets are not reflected in our statements of income, shareholders’ equity or cash flows.

Separate Accounts assets include debt and equity securities and derivative instruments.  The valuation methodologies used for these assets are similar to the methodologies described beginning on page 15.  Separate Accounts assets also include investments in common/collective trusts that are carried at fair value. Common trusts invest in other collective investment funds otherwise known as the underlying funds. The Separate Accounts’ interests in the common trust funds are based on the fair values of the investments of the underlying funds and therefore are classified as Level 2. The assets in the underlying funds primarily consist of equity securities. Investments in common trust funds are valued at their respective net asset value per share/unit on the valuation date.

Separate Accounts financial assets at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012										December 31, 2011
(Millions)	Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
Debt securities	$	902.4	$	3,135.0		$	—	$	4,037.4		$	1,079.1	$	2,817.8		$	—	$	3,896.9
Equity securities	208.2		.6			—		208.8			240.0		—			—		240.0
Derivatives	—		(2.6		)	—		(2.6		)	—		(5.0		)	—		(5.0		)
Common/collective trusts	—		692.1			—		692.1			—		696.0			—		696.0
Total (1)	$	1,110.6	$	3,825.1		$	—	$	4,935.7		$	1,319.1	$	3,508.8		$	—	$	4,827.9

⁽¹⁾  Excludes $385.4 million and $390.3 million of cash and cash equivalents and other receivables at June 30, 2012 and December 31, 2011, respectively.

There were no transfers of Separate Accounts financial assets between Levels 1 and 2 during the three or six months ended June 30, 2012 or 2011. Gross transfers out of Level 3 were $.6 million during the three and six months ended June 30, 2012, and there were no transfers into Level 3 during the three or six months ended June 30, 2012. There were no material transfers into or out of Level 3 during the three or six months ended June 30, 2011.

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8.    Pension and Other Postretirement Plans

Defined Benefit Retirement Plans

Components of the net periodic benefit (income) cost of our tax-qualified noncontributory defined benefit pension plans and other postretirement benefit (“OPEB”) plans for the three and six months ended June 30, 2012 and 2011 were as follows:

	Pension Plans												OPEB Plans
	Three Months Ended						Six Months Ended						Three Months Ended						Six Months Ended
	June 30,						June 30,						June 30,						June 30,
(Millions)	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	—		$	—		$	—		$	—		$	.1		$	—		$	.1		$	.1
Amortization of prior service cost	(.1		)	(.1		)	(.2		)	(.2		)	(.9		)	(.8		)	(1.8		)	(1.8		)
Interest cost	74.6			78.1			149.2			156.2			3.6			4.1			7.2			8.3
Expected return on plan assets	(96.9		)	(95.9		)	(193.7		)	(191.9		)	(.8		)	(.9		)	(1.4		)	(1.8		)
Recognized net actuarial losses	17.7			14.6			35.2			29.2			1.1			1.2			2.2			2.4
Net periodic benefit (income) cost	$	(4.7	)	$	(3.3	)	$	(9.5	)	$	(6.7	)	$	3.1		$	3.6		$	6.3		$	7.2

9.    Debt

The carrying value of our long-term debt at June 30, 2012 and December 31, 2011 was as follows:

(Millions)	June 30, 2012		December 31, 2011
Senior notes, 6.0%, due 2016	$	748.3	$	748.0
Senior notes, 1.75%, due 2017	248.4		—
Senior notes, 6.5%, due 2018	499.1		499.1
Senior notes, 3.95%, due 2020	743.0		742.6
Senior notes, 4.125%, due 2021	493.8		493.4
Senior notes, 6.625%, due 2036	798.7		798.7
Senior notes, 6.75%, due 2037	696.0		695.9
Senior notes, 4.5%, due 2042	479.0		—
Total long-term debt	$	4,706.3	$	3,977.7

In June 2012, we entered into an interest rate swap with a notional value of $200 million. We designated this swap as a cash flow hedge against interest rate exposure related to the forecasted future issuance of fixed-rate debt. At June 30, 2012, the interest rate swap had a pretax fair value gain of approximately $2 million, which was reflected net of tax in accumulated other comprehensive loss within shareholders' equity.

In May 2012, we issued $250 million of 1.75% senior notes due 2017 and $500 million of 4.5% senior notes due 2042 (collectively, the "2012 senior notes"). In 2011, prior to issuing the 2012 senior notes, we entered into two interest rate swaps with an aggregate notional value of $250 million and designated these swaps as cash flow hedges against interest rate exposure related to the forecasted future issuance of fixed-rate debt. We terminated the swaps prior to issuing the 2012 senior notes and paid an aggregate of $7.5 million to the swap counterparties upon termination of the swaps. The related $7.5 million pretax loss is recorded in accumulated other comprehensive loss and is being amortized as an increase to interest expense over the first twenty semi-annual interest payments associated with the $500 million of 4.5% senior notes due 2042.

At June 30, 2012, we had no commercial paper outstanding. At December 31, 2011, we had approximately $426 million of commercial paper outstanding with a weighted average interest rate of .38%.

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On March 27, 2012 we entered into an unsecured $1.5 billion five-year revolving credit agreement (the “Facility”) with several financial institutions. The Facility replaced our prior $1.5 billion five-year revolving credit agreement which was due to expire on March 27, 2013. The Facility provides for the issuance of up to $200 million of letters of credit at our request, which count as usage of the available commitments under the Facility.  Upon our agreement with one or more financial institutions, we may expand the aggregate commitments under the Facility to a maximum of $2.0 billion. Various interest rate options are available under the Facility.  Any revolving borrowings mature on the termination date of the Facility.  We pay facility fees on the Facility ranging from .070% to .150% per annum, depending upon our long-term senior unsecured debt rating.  The facility fee was .100% at June 30, 2012.  The Facility contains a financial covenant that requires us to maintain a ratio of total debt to consolidated capitalization as of the end of each fiscal quarter at or below .5 to 1.0.  For this purpose, consolidated capitalization equals the sum of total shareholders’ equity, excluding any overfunded or underfunded status of our pension and OPEB plans and any net unrealized capital gains and losses, and total debt (as defined in the Facility).  We met this requirement at June 30, 2012.  There were no amounts outstanding under the Facility or the replaced five-year revolving credit agreement at any time during the six months ended June 30, 2012.

10.    Capital Stock

On February 24, 2012 and September 23, 2011, our Board of Directors (our "Board") authorized two separate share repurchase programs. Each repurchase program authorized us to repurchase up to $750 million of our common stock.  During the six months ended June 30, 2012, we repurchased approximately 21 million shares of common stock at a cost of approximately $925 million.  At June 30, 2012, we had remaining authorization to repurchase an aggregate of up to approximately $248 million of common stock under the February 24, 2012 program.

During the six months ended June 30, 2012 our Board declared the following cash dividends:

Date Declared	Dividend Amount Per Share			Stockholders of Record Date	Date Paid/ To be Paid	Total Dividends (Millions)
February 24, 2012		$	.175	April 12, 2012	April 27, 2012		$	60.8
May 18, 2012		.175		July 12, 2012	July 27, 2012		59.2

Declaration and payment of future dividends is at the discretion of our Board and may be adjusted as business needs or market conditions change.

On February 2, 2012, approximately .5 million performance stock units (“PSUs”), 1.1 million market stock units (“MSUs”) and 1.1 million restricted stock units (“RSUs”) were granted to certain employees.  The number of vested PSUs (which could range from zero to 200% of the original number of units granted) is dependent upon the degree to which we achieve performance goals during the performance periods as determined by our Board’s Committee on Compensation and Organization.  The PSUs have two separate performance periods which relate to the Company's operating performance during the years ended December 31, 2012 and December 31, 2013. The vesting period for the PSUs ends on February 2, 2014.   The number of vested MSUs (which could range from zero to 150% of the original number of units granted) is based on the percentage change between the closing price of our common stock on the grant date and the weighted average closing price of our common stock for the thirty trading days prior to and including the vesting dates.  The MSUs have two separate vesting periods of approximately two and three years, respectively.  Each vested PSU, MSU and RSU represents one share of common stock and will be paid in shares of common stock, net of taxes, at the end of the applicable vesting period.  The RSUs will become 100% vested approximately three years from the grant date, with one-third vesting each December.

On February 8, 2012, the MSUs which were granted on February 8, 2010 became fully vested at approximately 150% of the original number of units granted.

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11.    Dividend Restrictions and Statutory Surplus

Under regulatory requirements at June 30, 2012, the amount of dividends that may be paid through the end of 2012 by our insurance and HMO subsidiaries without prior approval by regulatory authorities is approximately $1.0 billion in the aggregate.  There are no such restrictions on distributions from Aetna to its shareholders.  In the second quarter of 2012, our insurance and HMO subsidiaries paid approximately $501 million of dividends to the Company.

The combined statutory capital and surplus of our insurance and HMO subsidiaries was $6.6 billion and $5.9 billion at June 30, 2012 and December 31, 2011, respectively.

12.    Commitments and Contingencies

Guaranty Fund Assessments, Market Stabilization and Other Non-Voluntary Risk Sharing Pools

Under guaranty fund laws existing in all states, insurers doing business in those states can be assessed (up to prescribed limits) for certain obligations of insolvent insurance companies to policyholders and claimants. The health insurance guaranty associations in which we participate that operate under these laws respond to insolvencies of long-term care insurers as well as health insurers.  Our assessments generally are based on a formula relating to our premiums in the state compared to the premiums of other insurers. Certain states allow assessments to be recovered as offsets to premium taxes.  Some states have similar laws relating to HMOs.  The Pennsylvania Insurance Commissioner (the "Commissioner") has placed long-term care insurer Penn Treaty Network America Insurance Company and one of its subsidiaries (collectively, “Penn Treaty”) in rehabilitation, an intermediate action before insolvency, and subsequently petitioned a state court to convert the rehabilitation into a liquidation. In May 2012, the state court denied the request and ordered the Commissioner to propose a rehabilitation plan. If the rehabilitation is not successful and Penn Treaty ultimately is placed in liquidation, we and other insurers likely would be assessed over a period of years by guaranty associations for the payments the guaranty associations are required to make to Penn Treaty policyholders.  We are currently unable to predict the ultimate outcome of, or reasonably estimate the loss or range of losses resulting from, this potential insolvency because we cannot predict whether rehabilitation efforts will succeed, the amount of the insolvency, if any, the amount and timing of associated guaranty association assessments or the amount or availability of potential offsets, such as premium tax offsets.  It is reasonably possible that in future reporting periods we may record a liability and expense relating to Penn Treaty or other insolvencies which could have a material adverse effect on our operating results, financial position and cash flows.  While we have historically recovered more than half of guaranty fund assessments through statutorily permitted premium tax offsets, significant increases in assessments could lead to legislative and/or regulatory actions that may limit future offsets.

HMOs in certain states in which we do business are subject to assessments, including market stabilization and other risk-sharing pools, for which we are assessed charges based on incurred claims, demographic membership mix and other factors. We establish liabilities for these assessments based on applicable laws and regulations. In certain states, the ultimate assessments we pay are dependent upon our experience relative to other entities subject to the assessment and the ultimate liability is not known at the balance sheet date. While the ultimate amount of the assessment is dependent upon the experience of all pool participants, we believe we have adequate reserves to cover such assessments.

Litigation and Regulatory Proceedings

Out-of-Network Benefit Proceedings

We are named as a defendant in several purported class actions and individual lawsuits arising out of our practices related to the payment of claims for services rendered to our members by health care providers with whom we do not have a contract (“out-of-network providers”).   Among other things, these lawsuits allege that we paid too little to our health plan members and/or providers for these services, among other reasons, because of our use of data provided by Ingenix, Inc., a subsidiary of one of our competitors (“Ingenix”). Other major health insurers are the subject of similar litigation or have settled similar litigation.  

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Various plaintiffs who are health care providers or medical associations seek to represent nationwide classes of out-of-network providers who provided services to our members during the period from 2001 to the present.  Various plaintiffs who are members in our health plans seek to represent nationwide classes of our members who received services from out-of-network providers during the period from 2001 to the present.  Taken together, these lawsuits allege that we violated state law, the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), the Racketeer Influenced and Corrupt Organizations Act and federal antitrust laws, either acting alone or in concert with our competitors.  The purported classes seek reimbursement of all unpaid benefits, recalculation and repayment of deductible and coinsurance amounts, unspecified damages and treble damages, statutory penalties, injunctive and declaratory relief, plus interest, costs and attorneys’ fees, and seek to disqualify us from acting as a fiduciary of any benefit plan that is subject to ERISA.  Individual lawsuits that generally contain similar allegations and seek similar relief have been brought by health plan members and out-of-network providers.

The first class action case was commenced on July 30, 2007.  The federal Judicial Panel on Multi-District Litigation (the “MDL Panel”) has consolidated these class action cases in the U.S. District Court for the District of New Jersey (the “New Jersey District Court”) under the caption In re: Aetna UCR Litigation, MDL No. 2020 (“MDL 2020”).   In addition, the MDL Panel has transferred the individual lawsuits to MDL 2020.  On May 9, 2011, the New Jersey District Court dismissed the physician plaintiffs from MDL 2020 without prejudice.  The New Jersey District Court’s action followed a ruling by the United States District Court for the Southern District of Florida (the “Florida District Court”) that the physician plaintiffs were enjoined from participating in MDL 2020 due to a prior settlement and release.  The United States Court of Appeals for the Eleventh Circuit has dismissed the physician plaintiffs' appeal of the Florida District Court’s ruling.

Discovery is substantially complete in MDL 2020, several motions are pending, and briefing on class certification has been completed.  The court has not set a trial date or a timetable for deciding class certification.  We intend to vigorously defend ourselves against the claims brought in these cases.

We also have received subpoenas and/or requests for documents and other information from, and been investigated by, attorneys general and other state and/or federal regulators, legislators and agencies relating to our out-of-network benefit payment practices.  It is reasonably possible that others could initiate additional litigation or additional regulatory action against us with respect to our out-of-network benefit payment practices.

CMS Actions

On June 13, 2011, the Centers for Medicare & Medicaid Services (“CMS”) lifted the intermediate sanctions it had previously imposed on us that required us to suspend the enrollment of and marketing to new members of all Aetna Medicare Advantage and Standalone Prescription Drug Plan (“PDP”) contracts.  The sanctions related to our compliance with certain Medicare Part D requirements.  We have resumed marketing our Medicare Advantage and PDP products and have been enrolling beneficiaries with effective dates on and after July 1, 2011.  CMS still is not assigning any new low income subsidy members to our PDPs at this time.  However, low income subsidy members can make their own choice to enroll in Aetna products.  As a result of these sanctions, our 2011 Medicare membership and operating results were adversely affected because we did not participate in the annual enrollment process for 2011.  We continue to cooperate fully with CMS to address residual matters identified in connection with the sanction review.

CMS regularly audits our performance to determine our compliance with CMS’s regulations and our contracts with CMS and to assess the quality of services we provide to Medicare beneficiaries.  CMS uses various payment mechanisms to allocate and adjust premium payments to our and other companies’ Medicare plans by considering the applicable health status of Medicare members as supported by information maintained and provided by health care providers.  We collect claim and encounter data from providers and generally rely on providers to appropriately code their submissions and document their medical records.  CMS pays increased premiums to Medicare Advantage plans and PDPs for members who have certain medical conditions identified with specific diagnosis codes.  Federal regulators review and audit the providers’ medical records and related diagnosis codes that determine the members’ health status and the resulting risk-adjusted premium payments to us.  In that regard, CMS has instituted risk adjustment data validation (“RADV”) audits of various Medicare Advantage plans, including certain of the Company's plans. The Office of Inspector General (the “OIG”) also is auditing risk adjustment data, and we expect

Page 22

CMS and the OIG to continue auditing risk adjustment data.

On February 24, 2012, CMS published a Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation Contract-Level Audits (the "Notice"). The Notice outlines the methodology that CMS will use to determine RADV audit premium refunds payable by Medicare Advantage plans for contract years 2011 and forward. Under that methodology, the RADV audit premium refund calculation will include an adjustment for the differences in documentation standards between the RADV audits and the risk adjustment model; however, the Notice provides limited information about that adjustment. In addition, CMS will project the error rate identified in the audit sample to all risk adjusted premium payments made under the contract being audited. Historically, CMS did not make an adjustment for differences in documentation standards or project sample error rates to the entire contract. During or after August 2012, CMS will select Medicare Advantage contracts for contract year 2011 for audit. We are currently unable to predict which of our Medicare Advantage contracts will be selected for future audit, the financial impact of the documentation standard adjustment, the amounts of any retroactive refunds of, or prospective adjustments to, Medicare Advantage premium payments made to us, the effect of any such refunds or adjustments on the actuarial soundness of our Medicare Advantage bids, or whether any RADV audit findings would cause a change to our method of estimating future premium revenue in bid submissions to CMS for the current or future contract years or compromise premium assumptions made in our bids for prior contract years or the current contract year. Any premium refunds or adjustments resulting from regulatory audits, whether as a result of RADV or other audits by CMS, the OIG or otherwise, could be material and could adversely affect our operating results, financial position and cash flows.

Other Litigation and Regulatory Proceedings

We are involved in numerous other lawsuits arising, for the most part, in the ordinary course of our business operations, including employment litigation and claims of bad faith, medical malpractice, non-compliance with state and federal regulatory regimes, marketing misconduct, failure to timely or appropriately pay medical and/or group insurance claims (including post-payment audit and collection practices), rescission of insurance coverage, improper disclosure of personal information, patent infringement and other intellectual property litigation and other litigation in our Health Care and Group Insurance businesses.  Some of these other lawsuits are or are purported to be class actions.  We intend to vigorously defend ourselves against the claims brought in these matters.

In addition, our operations, current and past business practices, current and past contracts, and accounts and other books and records are subject to routine, regular and special investigations, audits, examinations and reviews by, and from time to time we receive subpoenas and other requests for information from, CMS, the U.S. Department of Health and Human Services, various state insurance and health care regulatory authorities, state attorneys general and offices of inspector general, the Center for Consumer Information and Insurance Oversight, the OIG, the Office of Personnel Management, committees, subcommittees and members of the U.S. Congress, the U.S. Department of Justice, the Federal Trade Commission, U.S. attorneys and other state and federal governmental authorities.  These government actions include inquiries by, and testimony before, certain members, committees and subcommittees of the U.S. Congress regarding certain of our current and past business practices, including our overall claims processing and payment practices, our business practices with respect to our small group products, student health products or individual customers (such as market withdrawals, rating information, premium increases and medical benefit ratios), executive compensation matters and travel and entertainment expenses, as well as the investigations by, and subpoenas and requests from, attorneys general and others described above under “Out-of-Network Benefit Proceedings.”  

There also continues to be heightened review by regulatory authorities of and increased litigation regarding the health care and related benefits industry’s business and reporting practices, including premium rate increases, utilization management, complaint, grievance and appeal processing, information privacy, provider network structure (including the use of performance-based networks), delegated arrangements, rescission of insurance coverage, limited benefit health products, student health products, pharmacy benefit management practices, sales practices, and claim payment practices (including payments to out-of-network providers and payments on life insurance policies).  For example, New York is one of over 35 states that are investigating life insurers' claims payment and related escheat practices, and these investigations have resulted in significant charges to earnings by

Page 23

other life insurers in connection with related settlements. We have received requests for information from New York, Connecticut and Minnesota with respect to our life insurance claim payment and related escheat practices.  

As a leading national health and related benefits company, we regularly are the subject of government actions of the types described above.  These government actions may prevent or delay us from implementing planned premium rate increases and may result, and have resulted, in restrictions on our business, changes to or clarifications of our business practices, retroactive adjustments to premiums, refunds or other payments to members, beneficiaries, states or the federal government, assessments of damages, civil or criminal fines or penalties, or other sanctions, including the possible loss of licensure or suspension or exclusion from participation in government programs, such as the intermediate sanctions previously imposed on us by CMS that are described above under “CMS Actions.”

Estimating the probable losses or a range of probable losses resulting from litigation, government actions and other legal proceedings is inherently difficult and requires an extensive degree of judgment, particularly where the matters involve indeterminate claims for monetary damages, may involve fines, penalties or punitive damages that are discretionary in amount, involve a large number of claimants or regulatory authorities, represent a change in regulatory policy, present novel legal theories, are in the early stages of the proceedings, are subject to appeal or could result in a change in business practices.  In addition, because most legal proceedings are resolved over long periods of time, potential losses are subject to change due to, among other things, new developments, changes in litigation strategy, the outcome of intermediate procedural and substantive rulings and other parties’ settlement posture and their evaluation of the strength or weakness of their case against us.  As a result, we are currently unable to predict the ultimate outcome of, or reasonably estimate the losses or a range of losses resulting from, the matters described above, and it is reasonably possible that their outcome could be material to us.

13.    Segment Information

Our operations are conducted in three business segments:  Health Care, Group Insurance and Large Case Pensions.  Our Corporate Financing segment is not a business segment; it is added to our business segments to reconcile to our consolidated results.  The Corporate Financing segment includes interest expense on our outstanding debt and the financing components of our pension and OPEB plan expense (the service cost and prior service cost components of this expense are allocated to our business segments).

Summarized financial information of our segments for the three and six months ended June 30, 2012 and 2011 was as follows:

(Millions)	Health Care		Group Insurance		Large Case Pensions		Corporate Financing			Total Company
Three Months Ended June 30, 2012
Revenue from external customers	$	8,106.2	$	457.7	$	39.8	$	—		$	8,603.7
Operating earnings (loss) (1)	443.5		46.0		3.9		(41.4		)	452.0
Three Months Ended June 30, 2011
Revenue from external customers	$	7,602.6	$	431.2	$	47.9	$	—		$	8,081.7
Operating earnings (loss) (1)	512.9		44.4		6.2		(40.7		)	522.8
Six Months Ended June 30, 2012
Revenue from external customers	$	16,225.7	$	912.3	$	89.2	$	—		$	17,227.2
Operating earnings (loss) (1)	912.4		86.9		9.7		(79.6		)	929.4
Six Months Ended June 30, 2011
Revenue from external customers	$	15,223.2	$	861.5	$	92.5	$	—		$	16,177.2
Operating earnings (loss) (1)	1,068.2		87.3		12.0		(84.5		)	1,083.0

⁽¹⁾  Operating earnings (loss) excludes net realized capital gains or losses and the other items described in the reconciliation on page 25.

Page 24

A reconciliation of operating earningsto net income for the three and six months ended June 30, 2012 and 2011 was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Operating earnings	$	452.0	$	522.8	$	929.4	$	1,083.0
Net realized capital gains, net of tax	5.6		13.9		39.2		39.7
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7

14.     Reinsurance

In January 2012, we entered into three-year reinsurance agreements with an unrelated insurer. The agreements allow us to reduce our required statutory capital and provide an aggregate of $150 million of collateralized excess of loss reinsurance coverage on a portion of Aetna's group Commercial Insured Health Care business.

Effective January 1, 2012, we renewed our agreement with another unrelated insurer to reinsure fifty percent of our group term life and group accidental death and dismemberment insurance policies. We entered into this contract in order to reduce the risk on catastrophic loss which in turn reduces our statutory capital and surplus requirements. This contract does not qualify for reinsurance accounting under GAAP. As such, this contract has been accounted for under deposit accounting.

15. Discontinued Products

Prior to 1993, we sold single-premium annuities (“SPAs”) and guaranteed investment contracts (“GICs”), primarily to employer sponsored pension plans.  In 1993, we discontinued selling these products to Large Case Pensions customers, and now we refer to these products as discontinued products.

We discontinued selling these products because they were generating losses for us, and we projected that they would continue to generate losses over their life (which is currently greater than 30 years for SPAs and less than 3 years for GICs); so we established a reserve for anticipated future losses at the time of discontinuance.  This reserve represents the present value (at the risk-free rate of return at the time of discontinuance, consistent with the duration of the liabilities) of the difference between the expected cash flows from the assets supporting these products and the cash flows expected to be required to meet the obligations of the outstanding contracts. 

Key assumptions in setting this reserve include future investment results, payments to retirees, mortality and retirement rates and the cost of asset management and customer service.  In 2012, we modified the mortality tables used in order to reflect a more up-to-date 2000 Retired Pensioner’s Mortality table. The mortality tables were previously modified in 1995, in order to reflect a more up-to-date 1994 Uninsured Pensioner's Mortality table. In 1997, we began the use of a bond default assumption to reflect historical default experience.  Other than these changes, since 1993 there have been no significant changes to the assumptions underlying the reserve.

We review the adequacy of this reserve quarterly based on actual experience.  As long as our expectation of future losses remains consistent with prior projections, the results of the discontinued products are applied against the reserve and do not affect net income.  However, if actual or expected future losses are greater than we currently estimate, we may increase the reserve, which could adversely impact net income.  If actual or expected future losses are less than we currently estimate, we may decrease the reserve, which could favorably impact net income.  As a result of this review, the reserve at each of June 30, 2012 and December 31, 2011 reflects management's best estimate of anticipated future losses, and is included in future policy benefits on our balance sheet.

Page 25

The activity in the reserve for anticipated future losses on discontinued products for the six months ended June 30, 2012 and 2011 was as follows (pretax):

(Millions)	2012			2011
Reserve, beginning of period	$	896.3		$	884.8
Operating (losses) income	(6.2		)	1.5
Net realized capital gains	32.6			19.7
Reserve, end of period	$	922.7		$	906.0

During the six months ended June 30, 2012, our discontinued products reflected net realized capital gains (primarily attributable to gains from the sale of debt securities, partially offset by losses from other investments) and operating losses. We evaluated these results against our expectations of future cash flows assumed in estimating the reserve and concluded that no adjustment to the reserve was required at June 30, 2012.

Assets and liabilities supporting discontinued products at June 30, 2012 and December 31, 2011 were as

follows: ⁽¹⁾ 

(Millions)	2012		2011
Assets:
Debt and equity securities available for sale	$	2,555.0	$	2,589.7
Mortgage loans	420.4		437.1
Other investments	656.0		619.2
Total investments	3,631.4		3,646.0
Other assets	116.3		130.0
Current and deferred income taxes	22.6		15.7
Receivable from continuing products (2)	539.3		523.2
Total assets	$	4,309.6	$	4,314.9
Liabilities:
Future policy benefits	$	2,933.0	$	3,005.8
Policyholders' funds	7.2		8.2
Reserve for anticipated future losses on discontinued products	922.7		896.3
Other liabilities (3)	446.7		404.6
Total liabilities	$	4,309.6	$	4,314.9

⁽¹⁾  Assets supporting the discontinued products are distinguished from assets supporting continuing products.

⁽²⁾  At the time of discontinuance, a receivable from Large Case Pensions' continuing products was established on the discontinued products balance sheet. This receivable represented the net present value of anticipated cash shortfalls in the discontinued products, which will be funded from continuing products. Interest on the receivable is accrued at the discount rate that was used to calculate the reserve. The offsetting payable, on which interest is similarly accrued, is reflected in continuing products. Interest on the payable generally offsets investment income on the assets available to fund the shortfall. These amounts are eliminated in consolidation.

⁽³⁾  Net unrealized capital gains on the available-for-sale debt securities are included in other liabilities and are not reflected in consolidated shareholders’ equity.

The distributions on our discontinued products consisted of scheduled contract maturities, settlements and benefit payments of $100 million and $201 million for the three and six months ended June 30, 2012, respectively, and $105 million and $209 million for the three and six months ended June 30, 2011, respectively. There were no participant-directed withdrawals from our discontinued products during the three or six months ended June 30, 2012 or 2011.  Cash required to fund these distributions was provided by earnings and scheduled payments on, and sales of, invested assets.

16. Subsequent Event

On July 27, 2012, our Board approved a new share repurchase program that authorizes us to repurchase up to $750 million of our common stock. The July 27, 2012 program is in addition to the remaining authorization under the February 24, 2012 program.

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Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders

Aetna Inc.:

We have reviewed the accompanying consolidated balance sheet of Aetna Inc. and subsidiaries as of June 30, 2012, the related consolidated statements of income and comprehensive income for the three-month and six-month periods ended June 30, 2012 and 2011, and the related consolidated statements of shareholders' equity and cash flows for the six-month periods ended June 30, 2012 and 2011. 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 Aetna Inc. and subsidiaries as of December 31, 2011, and the related consolidated statements of income, shareholders' equity, and cash flows for the year then ended (not presented herein); and in our report dated February 24, 2012, 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, 2011, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ KPMG LLP

Hartford, Connecticut

July 31, 2012

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Item 2.   Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”)

OVERVIEW

We are one of the nation’s leading diversified health care benefits companies, serving approximately 36.7 million people with information and resources to help them make better informed decisions about their health care.  We offer a broad range of traditional and consumer-directed health insurance products and related services, including medical, pharmacy, dental, behavioral health, group life and disability plans, medical management capabilities, Medicaid health care management services and health information technology services.  Our customers include employer groups, individuals, college students, part-time and hourly workers, health plans, health care providers, governmental units, government-sponsored plans, labor groups and expatriates.  Our operations are conducted in three business segments:  Health Care, Group Insurance and Large Case Pensions.

The following MD&A provides a review of our financial condition at June 30, 2012 and December 31, 2011 and operating results for the three and six months ended June 30, 2012 and 2011.  This Overview should be read in conjunction with the entire MD&A, which contains detailed information that is important to understanding our operating results and financial condition, the consolidated financial statements and other data presented in this Quarterly Report on Form 10-Q as well as the MD&A contained in our 2011 Annual Report on Form 10-K (the “2011 Annual Report”).  This Overview is qualified in its entirety by the full MD&A.

Summarized Results for the Three and Six Months Ended June 30, 2012 and 2011:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Revenue:
Health Care	$	8,188.8	$	7,706.4	$	16,431.5	$	15,449.8
Group Insurance	523.7		503.9		1,067.9		1,014.8
Large Case Pensions	122.6		134.1		251.5		267.6
Total revenue	8,835.1		8,344.4		17,750.9		16,732.2
Net income	457.6		536.7		968.6		1,122.7
Operating earnings: (1)
Health Care	443.5		512.9		912.4		1,068.2
Group Insurance	46.0		44.4		86.9		87.3
Large Case Pensions	3.9		6.2		9.7		12.0
Cash flows from operations					1,110.0		896.5

⁽¹⁾  Our discussion of operating results for our reportable business segments is based on operating earnings, which is a non-GAAP measure of net income (the term “GAAP” refers to U.S. generally accepted accounting principles).  Refer to “Segment Results and Use of Non-GAAP Measures” in this document beginning on page 30 for a discussion of non-GAAP measures.  Refer to pages 31, 34 and 35 for a reconciliation of operating earnings to net income for Health Care, Group Insurance and Large Case Pensions, respectively.

Our business segment operating earnings included $24.1 million after-tax and $121.3 million after-tax of favorable development of prior-period health care cost estimates in the three months ended June 30, 2012 and 2011, respectively. Excluding the impact of reserve development, our aggregate business segment operating earnings increased for the three months ended June 30, 2012 compared to the corresponding period in 2011, primarily due to higher underwriting margins and increased membership in the Medicare business in the Health Care segment, partially as a result of the Medicare Supplement business and related blocks of in-force business acquired from Genworth Financial, Inc. ("Genworth's Medicare Supplement business") in the second half of 2011. For the six months ended June 30, 2012 our aggregate business segment operating earnings excluding the impact of reserve development decreased compared to the corresponding period in 2011 as lower Commercial underwriting margins were largely offset by the favorable impact of higher underwriting margins and increased membership in the Medicare business, partially as a result of our 2011 acquisition of Genworth's Medicare Supplement business.

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Total revenue increased during the three and six months ended June 30, 2012 compared to the corresponding periods in 2011 primarily due to an increase in Health Care premium and higher fees and other revenue as a result of our 2011 acquisitions.

At June 30, 2012, we served approximately 18.0 million medical members (consisting of approximately 32% Insured members and 68% administrative services contract ("ASC") members), 13.6 million dental members and 8.7 million pharmacy benefit management services members.  At June 30, 2011, we served approximately 18.2 million medical members (consisting of approximately 31% Insured members and 69% ASC members), 13.8 million dental members and 8.8 million pharmacy benefit management services members.

We continued to generate strong cash flows from operations in 2012 and 2011, generating $1.2 billion and $1.0 billion of cash flows from operations in our Health Care and Group Insurance businesses during the six months ended June 30, 2012 and 2011, respectively.  During 2012, these cash flows contributed to funding our ordinary course operating activities, the payment of cash dividends to shareholders and repurchases of shares of our common stock. We paid dividends to our shareholders of $122 million during the six months ended June 30, 2012. In addition we repurchased 21 million and 18 million shares of common stock under our share repurchase programs at a cost of approximately $925 million and $735 million during the six months ended June 30, 2012 and 2011, respectively.  Refer to “Liquidity and Capital Resources” beginning on page 38 and Note 9 of Condensed Notes to Consolidated Financial Statements on page 19 for additional information.

Management Update

On February 20, 2012, we announced that Kristi Ann Matus was joining Aetna as Executive Vice President, Government Services and will lead our government services businesses and that we would consolidate and realign our Commercial ASC and insurance businesses under Frank G. McCauley, who assumed the role of Executive Vice President, Commercial Businesses.

On June 7, 2012, we announced that Karen S. Rohan will be joining Aetna as Executive Vice President, Head of Specialty Products and also will lead our distribution strategy.

Health Care Reform

The Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, “Health Care Reform”) makes broad-based changes to the U.S. health care system which could significantly affect the U.S. economy and will continue to significantly impact our business operations and financial results, including our pricing and medical benefit ratios.  Health Care Reform presents us with new business opportunities, but also with new financial and other challenges.  It is reasonably possible that Health Care Reform, in the aggregate, could have a material adverse effect on our business operations and financial results.

Components of the legislation will be phased in over the next six years.  We are dedicating and will continue to be required to dedicate material resources and incur material expenses during that time to implement and comply with Health Care Reform as well as state level health care reform.  While the federal government has issued a number of regulations implementing Health Care Reform, many significant parts of the legislation, including health insurance exchanges ("Insurance Exchanges"), Medicaid expansion, the scope of "essential health benefits", employer penalties and the implementation of minimum medical loss ratios (“MLRs”), require further guidance and clarification at the federal level and/or in the form of regulations and actions by state legislatures to implement the law.  As a result, many of the impacts of Health Care Reform will not be known for several years.  

On June 28, 2012, the U.S. Supreme Court issued a decision that generally upheld the constitutionality of Health Care Reform. However, pending efforts in the U.S. Congress to repeal, amend, or restrict funding for various aspects of Health Care Reform, the 2012 presidential and congressional elections, and the possibility of additional litigation challenging aspects of the law continue to create additional uncertainty about the ultimate impact of the legislation.

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The Supreme Court decision also permits states to opt out of the elements of Health Care Reform requiring expansion of Medicaid coverage in January 2014 without losing their current federal Medicaid funding, and governors in some states already have indicated that they will not support Medicaid expansion. The ruling also creates uncertainty regarding the effectiveness of Health Care Reform's "maintenance of effort" ("MOE") provision. If states are not subject to the MOE provision and allow certain programs to expire or choose to opt out of Medicaid expansion, we could experience reduced Medicaid enrollment or reduced Medicaid enrollment growth. We cannot predict whether pending or future federal or state legislation or court proceedings will change various aspects of Health Care Reform or state level health care reform, nor can we predict the impact those changes will have on our business operations or financial results, but the effects could be materially adverse.

Most state legislatures have adjourned for the year, and they generally have not enacted legislation related to Health Care Reform. To date, approximately a dozen states have indicated that they will establish Insurance Exchanges. Following the Supreme Court decision, we expect most states to begin working more actively to develop their Insurance Exchanges, although a few state governors have indicated they will not establish Insurance Exchanges.

For additional information on Health Care Reform refer to "MD&A-Overview-Health Care Reform Legislation," "Regulatory Environment" and "Forward-Looking Information/Risk Factors" in our 2011 Annual Report.

Segment Results and Use of Non-GAAP Measures in this Document

The following discussion of operating results is presented based on our reportable segments in accordance with the accounting guidance for segment reporting and consistent with our segment disclosure included in Note 13 of Condensed Notes to Consolidated Financial Statements beginning on page 24.  Our operations are conducted in three business segments: Health Care, Group Insurance and Large Case Pensions.  Our Corporate Financing segment is not a business segment; it is added to our business segments to reconcile to our consolidated results.  The Corporate Financing segment includes interest expense on our outstanding debt and the financing components of our pension and other postretirement benefit (“OPEB”) plan expense (the service cost and prior service cost components of this expense are allocated to our business segments).  

Our discussion of our operating results is based on operating earnings, which is the measure reported to our Chief Executive Officer for purposes of assessing financial performance and making operating decisions, such as allocating resources to each segment.  Operating earnings exclude net realized capital gains or losses as well as other items that neither relate to the ordinary course of our business nor reflect our underlying business performance, if any, from net income reported in accordance with GAAP.  We believe excluding net realized capital gains or losses from net income to arrive at operating earnings provides more meaningful information about our underlying business performance.  Net realized capital gains and losses arise from various types of transactions, primarily in the course of managing a portfolio of assets that support the payment of liabilities; however, these transactions do not directly relate to the underwriting or servicing of products for our customers and are not directly related to the core performance of our business operations.  In each segment discussion in this MD&A, we provide a table that reconciles operating earnings to net income.  Each table details the net realized capital gains or losses and any other items excluded from net income, and the footnotes to each table describe the nature of each other item and why we believe it is appropriate to exclude that item from net income.

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HEALTH CARE

Health Care consists of medical, pharmacy benefit management services, dental, behavioral health and vision plans offered on both an Insured basis and an ASC basis.  Medical products include point-of-service (“POS”), preferred provider organization (“PPO”), health maintenance organization (“HMO”) and indemnity benefit plans.  Medical products also include health savings accounts ("HSAs") and Aetna HealthFund^®, consumer-directed health plans that combine traditional POS or PPO and/or dental coverage, subject to a deductible, with an accumulating benefit account.  We also offer Medicare and Medicaid products and services, as well as specialty products, such as health information technology services, medical management and data analytics services, medical stop loss insurance and products that provide access to our provider networks in select geographies.  We separately track premiums and health care costs for Medicare and Medicaid products; all other medical, dental and other Health Care products are referred to as Commercial. We refer to insurance products (where we assume all or a majority of the risk for medical and dental care costs) as “Insured” and administrative services contract products (where the plan sponsor assumes all or a majority of the risk for medical and dental care costs) as “ASC.”

Operating Summary for the Three and Six Months Ended June 30, 2012 and 2011:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Premiums:
Commercial	$	5,202.6	$	5,031.4	$	10,379.7	$	10,045.0
Medicare	1,554.3		1,358.3		3,205.9		2,767.1
Medicaid	411.0		343.7		769.7		671.9
Total premiums	7,167.9		6,733.4		14,355.3		13,484.0
Fees and other revenue	938.3		869.2		1,870.4		1,739.2
Net investment income	76.9		88.8		158.5		177.9
Net realized capital gains	5.7		15.0		47.3		48.7
Total revenue	8,188.8		7,706.4		16,431.5		15,449.8
Health care costs	5,908.3		5,366.8		11,765.8		10,714.8
Operating expenses:
Selling expenses	250.2		250.9		506.0		522.4
General and administrative expenses	1,302.1		1,253.8		2,620.1		2,458.3
Total operating expenses	1,552.3		1,504.7		3,126.1		2,980.7
Amortization of other acquired intangible assets	35.9		24.5		72.6		49.1
Total benefits and expenses	7,496.5		6,896.0		14,964.5		13,744.6
Income before income taxes	692.3		810.4		1,467.0		1,705.2
Income taxes	245.0		287.8		523.8		605.4
Net income	$	447.3	$	522.6	$	943.2	$	1,099.8

The table presented below reconciles net income to operating earnings for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
Net income	$	447.3		$	522.6		$	943.2		$	1,099.8
Net realized capital gains, net of tax	(3.8		)	(9.7		)	(30.8		)	(31.6		)
Operating earnings	$	443.5		$	512.9		$	912.4		$	1,068.2

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Included in operating earnings for the three months ended June 30, 2012 and 2011 was $24.1 million and $121.3 million of favorable after-tax development of prior-period health care costs estimates, respectively, primarily from first quarter 2012 and first quarter 2011 incurred health care costs, respectively. Excluding the impact of favorable prior-period reserve development, operating earnings increased by $28 million for the three months ended June 30, 2012 compared to the corresponding period in 2011, primarily due to higher underwriting margins and increased membership in our Medicare business, partially as a result of our 2011 acquisition of Genworth's Medicare Supplement business. For the six months ended June 30, 2012 operating earnings excluding prior-years reserve development were lower than the corresponding period in 2011, as lower underwriting margins in our Commercial business were largely offset by the favorable impact of higher underwriting margins and increased membership in our Medicare business, partially as a result of our 2011 acquisition of Genworth's Medicare Supplement business.

We calculate our medical benefit ratio (“MBR”) by dividing health care costs by premiums.  For the three and six months ended June 30, 2012 and 2011, our MBRs by product were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2012		2011		2012		2011
Commercial	81.7	%	77.9	%	80.8	%	77.4	%
Medicare	82.9	%	84.6	%	83.7	%	84.8	%
Medicaid	90.1	%	87.2	%	90.8	%	87.8	%
Total	82.4	%	79.7	%	82.0	%	79.5	%

Refer to our discussion of Commercial and Medicare results below for an explanation of the changes in our MBRs.

Commercial operating results reflect lower underwriting margins and lower Insured membership in 2012 compared to 2011.

Commercial premiums increased approximately $171 million and $335 million for the three and six months ended June 30, 2012, respectively, when compared to the corresponding periods in 2011, due primarily to higher Commercial premium rates partially offset by lower Commercial Insured membership in 2012.

Our Commercial MBRs were 81.7% and 80.8% for the three and six months ended June 30, 2012, respectively, compared to 77.9% and 77.4% for the corresponding periods in 2011.  Our Commercial MBR was higher in the three and six months ended June 30, 2012 compared to the corresponding periods in 2011 primarily due to the impact of favorable development of prior-period health care cost estimates in 2011 and consideration of our 2011 experience in our 2012 pricing. The 2011 development was primarily caused by lower than projected utilization of most categories of medical services. Refer to “Critical Accounting Estimates – Health Care Costs Payable” in our 2011 Annual Report for a discussion of Health Care Costs Payable at December 31, 2011.

Medicare results for the three and six months ended June 30, 2012 reflect higher underwriting margins and an increase in membership from the corresponding periods in 2011.

Medicare premiums increased approximately $196 million and $439 million for the three and six months ended June 30, 2012, respectively, when compared to the corresponding periods in 2011, primarily due to membership growth in Medicare Advantage and the addition of Genworth's Medicare Supplement business.

Our Medicare MBRs were 82.9% and 83.7% for the three and six months ended June 30, 2012, respectively, compared to 84.6% and 84.8% for the corresponding periods in 2011.  For the three months ended June 30, 2012 the decrease was primarily due to an increase in the proportion of Medicare Supplement business as well as greater favorable development of prior-period health care cost estimates in 2012. For the six months ended June 30, 2012 the decrease was primarily due to premium revenue growth that outpaced health care cost growth in 2012 and an increase in the proportion of Medicare Supplement business.

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Other Sources of Revenue

Medicaid revenues for the three and six months ended June 30, 2012 increased $67.3 million and $97.8 million compared to the corresponding periods in 2011 primarily from membership increases in certain high acuity Medicaid contracts with greater per-member premium rates which more than offset the decline in premium from other membership losses. Health Care fees and other revenue for the three and six months ended June 30, 2012 increased $69 million and $131 million compared to the corresponding periods in 2011 as a result of the inclusion of revenues from our 2011 acquisitions.

General and Administrative Expenses

General and administrative expenses increased during the three and six months ended June 30, 2012 compared with the corresponding periods of 2011, due primarily to the inclusion of expenses associated with our 2011 acquisitions and increased investments in growth initiatives, partially offset by continued execution of our expense initiatives.

Membership

Health Care’s membership at June 30, 2012 and 2011 was as follows:

	2012			2011
(Thousands)	Insured	ASC	Total	Insured	ASC	Total
Medical:
Commercial	4,745	11,476	16,221	4,784	11,810	16,594
Medicare Advantage	437	—	437	393	—	393
Medicaid	345	843	1,188	403	839	1,242
Medicare Supplement	183	—	183	12	—	12
Total Medical Membership	5,710	12,319	18,029	5,592	12,649	18,241
Consumer-Directed Health Plans (1)			2,552			2,405
Dental:
Commercial	4,688	7,286	11,974	4,744	7,437	12,181
Medicare and Medicaid	186	451	637	167	468	635
Network Access(2)	—	979	979	—	970	970
Total Dental Membership	4,874	8,716	13,590	4,911	8,875	13,786
Pharmacy:
Commercial			7,882			8,131
Medicare PDP (stand-alone)			471			432
Medicare Advantage PDP			200			188
Medicaid			108			27
Total Pharmacy Benefit Management Services			8,661			8,778

⁽¹⁾  Represents members in consumer-directed health plans who also are included in Commercial medical membership above.

⁽²⁾  Represents members in products that allow these members access to our dental provider network for a nominal fee.

Total medical membership at June 30, 2012decreased compared to June 30, 2011, reflecting a decline in Commercial ASC membership due to lapsed customers and in-group attrition that exceeded new sales. This decrease was partially offset by the addition of more than 165 thousand Medicare Supplement members from the 2011 acquisition and subsequent growth of Genworth's Medicare Supplement business and related blocks of in-force business and growth in Medicare Advantage membership.

Total dental membership at June 30, 2012decreased compared to June 30, 2011 primarily due to lapsed customers that exceeded new sales in the Commercial ASC business.

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Total pharmacy benefit management services membership decreased at June 30, 2012 compared to June 30, 2011 primarily due to a decrease in Commercial medical enrollment partially offset by growth in other businesses.

GROUP INSURANCE

Group Insurance primarily includes group life insurance products offered on an Insured basis, including basic and supplemental group term life, group universal life, supplemental or voluntary programs and accidental death and dismemberment coverage.  Group Insurance also includes: (i) group disability products offered to employers on both an Insured and an ASC basis, which consist primarily of short-term and long-term disability insurance (and products which combine both), (ii) absence management services offered to employers, which include short-term and long-term disability administration and leave management, and (iii) long-term care products that were offered primarily on an Insured basis, which provide benefits covering the cost of care in private home settings, adult day care, assisted living or nursing facilities.  We no longer solicit or accept new long-term care customers.

Operating Summary for the Three and Six Months Ended June 30, 2012 and 2011:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(Millions)	2012			2011		2012		2011
Premiums:
Life	$	264.9		$	263.1	$	528.7	$	521.0
Disability	155.0			132.0		309.5		266.1
Long-term care	11.6			11.3		23.2		22.8
Total premiums	431.5			406.4		861.4		809.9
Fees and other revenue	26.2			24.8		50.9		51.6
Net investment income	68.0			68.3		145.4		142.4
Net realized capital (losses) gains	(2.0		)	4.4		10.2		10.9
Total revenue	523.7			503.9		1,067.9		1,014.8
Current and future benefits	371.8			355.6		759.0		717.4
Operating expenses:
Selling expenses	21.2			16.3		41.7		35.5
General and administrative expenses	70.6			65.9		139.6		129.3
Total operating expenses	91.8			82.2		181.3		164.8
Amortization of other acquired intangible assets	1.1			1.1		2.2		2.8
Total benefits and expenses	464.7			438.9		942.5		885.0
Income before income taxes	59.0			65.0		125.4		129.8
Income taxes	14.3			17.7		31.9		35.4
Net income	$	44.7		$	47.3	$	93.5	$	94.4

The table presented below reconciles net income to operating earnings for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(Millions)	2012		2011			2012			2011
Net income	$	44.7	$	47.3		$	93.5		$	94.4
Net realized capital losses (gains), net of tax	1.3		(2.9		)	(6.6		)	(7.1		)
Operating earnings	$	46.0	$	44.4		$	86.9		$	87.3

Operating earnings for the three and six months ended June 30, 2012 were relatively flat when compared to the corresponding periods in 2011.

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The group benefit ratio (which represents current and future benefits divided by premiums) was 86.2% and 88.1% for the three and six months ended June 30, 2012 compared to 87.5% and 88.6% for corresponding periods in 2011. The group benefit ratios improved for the three and six months ended June 30, 2012 primarily due to higher underwriting margins in our life products.

LARGE CASE PENSIONS

Large Case Pensions manages a variety of retirement products (including pension and annuity products) primarily for tax qualified pension plans.  These products provide a variety of funding and benefit payment distribution options and other services.  The Large Case Pensions segment includes certain discontinued products.

Operating Summary for the Three and Six Months Ended June 30, 2012 and 2011:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012			2011
Premiums	$	37.2	$	45.4	$	83.7		$	87.2
Net investment income	77.9		84.2		159.5			173.6
Other revenue	2.6		2.5		5.5			5.3
Net realized capital gains	4.9		2.0		2.8			1.5
Total revenue	122.6		134.1		251.5			267.6
Current and future benefits	111.5		122.1		235.2			245.8
General and administrative expenses	3.0		3.6		6.3			7.3
Total benefits and expenses	114.5		125.7		241.5			253.1
Income before income taxes	8.1		8.4		10.0			14.5
Income taxes (benefits), net of tax	1.1		.9		(1.5		)	1.5
Net income	$	7.0	$	7.5	$	11.5		$	13.0

The table presented below reconciles net income to operating earnings for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
Net income	$	7.0		$	7.5		$	11.5		$	13.0
Net realized capital gains, net of tax	(3.1		)	(1.3		)	(1.8		)	(1.0		)
Operating earnings	$	3.9		$	6.2		$	9.7		$	12.0

Operating earnings in the three and six months ended June 30, 2012 declined compared to the corresponding periods in 2011, which is consistent with the run-off nature of this segment.

Discontinued Products

Prior to 1993, we sold single-premium annuities (“SPAs”) and guaranteed investment contracts (“GICs”), primarily to employer sponsored pension plans.  In 1993, we discontinued selling these products to Large Case Pensions customers, and now we refer to these products as discontinued products.

We discontinued selling these products because they were generating losses for us, and we projected that they would continue to generate future losses over their life (which is currently greater than 30 years for SPAs and less than 3 years for GICs); so we established a reserve for anticipated future losses at the time of discontinuance.  We provide additional information on this reserve, including key assumptions and other important information, in Note 15 of Condensed Notes to Consolidated Financial Statements beginning on page 25.

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The operating summary for Large Case Pensions on page 35 includes revenues and expenses related to our discontinued products, with the exception of net realized capital gains and losses which are recorded as part of current and future benefits.  Since we established a reserve for future losses on discontinued products, as long as our expectation of future losses remains consistent with prior projections, the results of our discontinued products are applied against the reserve and do not impact operating earnings or net income for Large Case Pensions. However, if actual or expected future losses are greater than we currently estimate, we may increase the reserve, which could adversely impact net income.  If actual or expected future losses are less than we currently estimate, we may decrease the reserve, which could favorably impact net income.  In those cases, we disclose such adjustment separately in the operating summary.  Management reviews the adequacy of the discontinued products reserve quarterly.  The current reserve reflects management's best estimate of anticipated future losses.

The activity in the reserve for anticipated future losses on discontinued products for the six months ended June 30, 2012 and 2011 was as follows (pretax):

(Millions)	2012			2011
Reserve, beginning of period	$	896.3		$	884.8
Operating (losses) income	(6.2		)	1.5
Net realized capital gains	32.6			19.7
Reserve, end of period	$	922.7		$	906.0

During the six months ended June 30, 2012, our discontinued products reflected net realized capital gains (primarily attributable to gains from the sale of debt securities, partially offset by losses from other investments) and operating losses. We evaluated these results against our expectations of future cash flows assumed in estimating the reserve and concluded that no adjustment to the reserve was required at June 30, 2012.

INVESTMENTS

At June 30, 2012 and December 31, 2011 our investment portfolio consisted of the following:

(Millions)	June 30, 2012		December 31, 2011
Debt and equity securities available for sale	$	17,686.7	$	17,390.8
Mortgage loans	1,623.9		1,648.5
Other investments	1,367.4		1,255.7
Total investments	$	20,678.0	$	20,295.0

The risks associated with investments supporting experience-rated pension and annuity products in our Large Case Pensions business are assumed by the contract holders and not by us (subject to, among other things, certain minimum guarantees).  Anticipated future losses associated with the discontinued fully-guaranteed Large Case Pensions products are provided for in the reserve for anticipated future losses on discontinued products.

As a result of the foregoing, investment risks associated with our experience-rated and discontinued products generally do not impact our operating results.  Our investment portfolio supported the following products at June 30, 2012 and December 31, 2011:

(Millions)	June 30, 2012		December 31, 2011
Experience-rated products	$	1,642.2	$	1,645.0
Discontinued products	3,631.4		3,646.0
Remaining products	15,404.4		15,004.0
Total investments	$	20,678.0	$	20,295.0

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Assets supporting experience-rated products may be subject to contract holder or participant withdrawals. Experience-rated contract holder and participant-directed withdrawals for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Scheduled contract maturities and benefit payments (1)	$	58.7	$	61.9	$	117.9	$	123.7
Contract holder withdrawals other than scheduled contract
maturities and benefit payments	.9		7.3		3.1		7.8
Participant-directed withdrawals	.3		.7		1.1		2.4

⁽¹⁾  Includes payments made upon contract maturity and other amounts distributed in accordance with contract schedules.

Debt and Equity Securities

The debt securities in our investment portfolio had an average credit quality rating of A+ and A at June 30, 2012 and December 31, 2011, respectively, with approximately $4.7 billion at June 30, 2012 and $4.4 billion at December 31, 2011 rated AAA.  The debt securities that were rated below investment grade (that is, having a quality rating below BBB-/Baa3) were $1.1 billion at June 30, 2012 and $1.2 billion at December 31, 2011 (of which 19% and 20% at June 30, 2012 and December 31, 2011, respectively, supported our discontinued and experience-rated products).

At June 30, 2012 and December 31, 2011, we held approximately $723 million and $733 million, respectively, of municipal debt securities that were guaranteed by third parties, representing approximately 3% and 4% of our total investments, respectively.  These securities had an average credit quality rating of A+ at both June 30, 2012 and December 31, 2011 with and without the guarantee.  We do not have any significant concentration of investments with third party guarantors (either direct or indirect).

At both June 30, 2012 and December 31, 2011, approximately 2% of our investment portfolio was comprised of investments that were either European sovereign, agency, or local government debt or European corporate issuers of countries which, in our judgment based on an analysis of market-yields, are experiencing economic, fiscal or political strains such that the likelihood of default may be higher than if those factors did not exist.

We classify our debt and equity securities as available for sale, and carry them at fair value on our balance sheet.  Approximately 1% of our debt and equity securities at both June 30, 2012 and December 31, 2011 were valued using inputs that reflect our own assumptions (categorized as Level 3 inputs in accordance with GAAP).  Refer to Note 7 of Condensed Notes to Consolidated Financial Statements beginning on page 14 for additional information on the methodologies and key assumptions we use to determine the fair value of investments.

At June 30, 2012 and December 31, 2011, our debt and equity securities had net unrealized capital gains of $1.7 billion and $1.5 billion, respectively, of which $494 million and $457 million, respectively, related to our experience-rated and discontinued products.

Refer to Note 5 of Condensed Notes to Consolidated Financial Statements beginning on page 8 for details of net unrealized capital gains and losses by major security type, as well as details on our debt securities with unrealized capital losses at June 30, 2012 and December 31, 2011.  We regularly review our debt securities to determine if a decline in fair value below the carrying value is other-than-temporary.  If we determine a decline in fair value is other-than-temporary, we will write down the carrying value of the security.  The amount of the credit-related impairment is included in our operating results, and the non-credit component is included in other comprehensive income if we do not intend to sell the security.  Accounting for other-than-temporary impairments of our debt securities is considered a critical accounting estimate.  Refer to “Critical Accounting Estimates - Other-Than-Temporary Impairment of Debt Securities” in our 2011 Annual Report for more information.

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Net Realized Capital Gains and Losses

Net realized capital gains were $6 million ($9 million pretax) and $39 million ($60 million pretax) for the three and six months ended June 30, 2012, respectively, and $14 million ($21 million pretax) and $40 million ($61 million pretax) for the corresponding periods in 2011, respectively.  We had no individual realized capital losses on debt or equity securities that materially impacted our operating results during the three or six months ended June 30, 2012 or 2011.

Mortgage Loans

Our mortgage loan portfolio (which is collateralized by commercial real estate) represented 8% of our total invested assets at both June 30, 2012 and December 31, 2011.  There were no material impairment reserves on these loans at June 30, 2012 or December 31, 2011.  Refer to Note 5 of Condensed Notes to Consolidated Financial Statements on page 8 for additional information on our mortgage loan portfolio.

Risk Management and Market-Sensitive Instruments

We manage interest rate risk by seeking to maintain a tight match between the durations of our assets and liabilities where appropriate.  We manage credit risk by seeking to maintain high average quality ratings and diversified sector exposure within our debt securities portfolio.  In connection with our investment and risk management objectives, we also use derivative financial instruments whose market value is at least partially determined by, among other things, levels of or changes in interest rates (short-term or long-term), duration, prepayment rates, equity markets or credit ratings/spreads.  Our use of these derivatives is generally limited to hedging risk and has principally consisted of using interest rate swap agreements, forward contracts, futures contracts, put options and credit default swaps.  Additionally, from time to time, we receive warrants from our vendors.  These instruments, viewed separately, subject us to varying degrees of interest rate, equity price and credit risk.  However, when used for hedging, we expect these instruments to reduce overall risk.

We regularly evaluate our risk from market-sensitive instruments by examining, among other things, levels of or changes in interest rates (short-term or long-term), duration, prepayment rates, equity markets or credit ratings/spreads.  We also regularly evaluate the appropriateness of investments relative to our management-approved investment guidelines (and operate within those guidelines) and the business objectives of our portfolios.

On a quarterly basis, we review the impact of hypothetical net losses in our investment portfolio for the risk factors noted above on our consolidated near-term financial position, operating results and cash flows assuming the occurrence of certain reasonably possible changes in near-term market rates and prices.  Based upon this analysis, there have been no material changes in our exposure to these risks since December 31, 2011.  Refer to the MD&A in our 2011 Annual Report for a more complete discussion of risk management and market-sensitive instruments.

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

We meet our operating cash requirements by maintaining liquidity in our investment portfolio, using overall cash flows from premiums, fees and other revenue, deposits and income received on investments, and issuing commercial paper from time to time.  We monitor the duration of our investment portfolio of highly marketable debt securities and mortgage loans, and execute purchases and sales of these investments with the objective of having adequate funds available to satisfy our maturing liabilities.  Overall cash flows are used primarily for claim and benefit payments, contract withdrawals, operating expenses, share repurchases and shareholder dividends.  We have a committed short-term borrowing capacity of $1.5 billion through the five-year revolving credit facility agreement which we entered into on March 27, 2012 to replace our $1.5 billion credit facility which was due to expire in March 2013.

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Presented below is a condensed statement of cash flows for the six months ended June 30, 2012 and 2011.  We present net cash flows used for operating activities and net cash flows provided by investing activities separately for our Large Case Pensions segment because changes in the insurance reserves for the Large Case Pensions segment (which are reported as cash used for operating activities) are funded from the sale of investments (which are reported as cash provided by investing activities).  Refer to the Consolidated Statements of Cash Flows on page 5 for additional information.

(Millions)	2012			2011
Cash flows from operating activities
Health Care and Group Insurance	$	1,238.2		$	1,035.9
Large Case Pensions	(128.2		)	(139.4		)
Net cash provided by operating activities	1,110.0			896.5
Cash flows from investing activities
Health Care and Group Insurance	(240.9		)	(1,470.3		)
Large Case Pensions	127.4			135.6
Net cash used for investing activities	(113.5		)	(1,334.7		)
Net cash used for financing activities	(754.1		)	(518.9		)
Net increase (decrease) in cash and cash equivalents	$	242.4		$	(957.1	)

Cash Flow Analysis

Cash flows provided by operating activities for Health Care and Group Insurance were approximately $1.2 billion for the six months ended June 30, 2012 and $1.0 billion for the six months ended June 30, 2011.  The increase for the six months ended June 30, 2012 compared with the corresponding period in 2011 is primarily attributable to the timing of Medicare premium receipts as we received a payment associated with July 2012 on June 29, 2012, which was partially offset by lower net income during the six months ended June 30, 2012 compared to the corresponding period in 2011.

In May 2012, we issued $250 million of 1.75% senior notes due in 2017 and $500 million of 4.5% senior notes due in 2042 (collectively, the "2012 senior notes"), which provided us with cash proceeds of $720.4 million after underwriting fees and other offering expenses, and being issued at a discount. Prior to issuing the 2012 senior notes we terminated two interest rate swaps related to the forecast issuance of fixed-rate debt and paid an aggregate of $7.5 million to the swap counterparties. Additionally, during the six months ended June 30, 2012 and 2011, our cash flows from financing activities reflects the repurchase of approximately 21 million and 18 million shares of common stock at a cost of approximately $925 million and $735 million, respectively. At June 30, 2012, the capacity remaining under our share repurchase authorization was approximately $248 million. On July 27, 2012, our Board approved a new share repurchase program that authorizes us to repurchase up to an additional $750 million of our common stock. Refer to Note 10 of the Condensed Notes to Consolidated Financial Statements on page 20 for more information on our share repurchases.

During the six months ended June 30, 2012 our Board of Directors (our "Board") declared the following cash dividends:

	Dividend Amount			Stockholders of	Date Paid/ To be Paid	Total Dividends
Date Declared	Per Share			Record Date		(Millions)
February 24, 2012		$	.175	April 12, 2012	April 27, 2012		$	60.8
May 18, 2012		.175		July 12, 2012	July 27, 2012		59.2

Declaration and payment of future dividends is at the discretion of our Board and may be adjusted as business needs or market conditions change.

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Other Liquidity Information

From time to time, we use short-term commercial paper borrowings to address timing differences between cash receipts and disbursements.  At June 30, 2012, we did not have any commercial paper outstanding. At December 31, 2011, we had approximately $426 million of commercial paper outstanding.  The maximum amount of commercial paper borrowings outstanding during the six months ended June 30, 2012 was $721 million.

On March 27, 2012 we entered into an unsecured $1.5 billion five-year revolving credit agreement (the “Facility”) with several financial institutions. The Facility replaced our prior $1.5 billion five-year revolving credit agreement which was due to expire on March 27, 2013. The Facility also provides for the issuance of letters of credit at our request, up to $200 million, which count as usage of the available commitments under the Facility.  Upon our agreement with one or more financial institutions, we may expand the aggregate commitments under the Facility to a maximum of $2.0 billion. There were no amounts outstanding under the Facility or the replaced five-year revolving credit agreement at any time during the six months ended June 30, 2012.

Our debt to capital ratio (calculated as the sum of all short- and long-term debt outstanding (“total debt”) divided by the sum of shareholders’ equity plus total debt) was approximately 31% at June 30, 2012.  We continually monitor existing and alternative financing sources to support our capital and liquidity needs, including, but not limited to, debt issuance, preferred or common stock issuance, reinsurance and pledging or selling of assets.

Interest expense was $64 million and $124 million for the three and six months ended June 30, 2012, respectively, and $62 million and $128 million for the three and six months ended June 30, 2011, respectively.

Refer to Note 9 of Condensed Notes to Consolidated Financial Statements beginning on page 19 for additional information on our short-term and long-term debt.

Other Common Stock Transactions

On February 2, 2012, we granted approximately .5 million performance stock units, 1.1 million market stock units and 1.1 million restricted stock units to certain employees.  Refer to Note 10 of Condensed Notes to Consolidated Financial Statements on page 20 for additional information.

CRITICAL ACCOUNTING ESTIMATES

Refer to “Critical Accounting Estimates” in our 2011 Annual Report for information on accounting policies that we consider critical in preparing our Consolidated Financial Statements.  These policies include significant estimates we make using information available at the time the estimates are made.  However, these estimates could change materially if different information or assumptions were used, and these estimates may not reflect the actual amounts of the final transactions that occur.

REGULATORY ENVIRONMENT

Except as set forth below, there were no material changes in the regulation of our business since December 31, 2011.  Refer to the "Regulatory Environment" section in our 2011 Annual Report for information on the regulation of our business.

Medicare

CMS regularly audits our performance to determine our compliance with CMS's regulations and our contracts with CMS and to assess the quality of services we provide to Medicare beneficiaries.  CMS uses various payment mechanisms to allocate and adjust premium payments to our and other companies' Medicare plans by considering the applicable health status of Medicare members as supported by information maintained and provided by health care providers.  We collect claim and encounter data from providers and generally rely on providers to appropriately code their submissions and document their medical records.  CMS pays increased premiums to Medicare Advantage plans and PDPs for members who have certain medical conditions identified with specific diagnosis codes.  Federal regulators review and audit the providers' medical records and related diagnosis codes that determine the members' health status and the resulting risk-adjusted premium payments to us.  In that regard, CMS has instituted risk

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adjustment data validation (“RADV”) audits of various Medicare Advantage plans, including certain of the Company's plans. The Office of Inspector General (the “OIG”) also is auditing risk adjustment data, and we expect CMS and the OIG to continue auditing risk adjustment data.  

On February 24, 2012, CMS published a Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation Contract-Level Audits (the "Notice"). The Notice outlines the methodology that CMS will use to determine RADV audit premium refunds payable by Medicare Advantage plans for contract years 2011 and forward. Under that methodology, the RADV audit premium refund calculation will include an adjustment for the differences in documentation standards between the RADV audits and the risk adjustment model; however, the Notice provides limited information about that adjustment. In addition, CMS will project the error rate identified in the audit sample to all risk adjusted premium payments made under the contract being audited. Historically, CMS did not make an adjustment for differences in documentation standards or project sample error rates to the entire contract. During or after August 2012, CMS will select Medicare Advantage contracts for contract year 2011 for audit. We are currently unable to predict which of our Medicare Advantage contracts will be selected for future audit, the financial impact of the documentation standard adjustment, the amounts of any retroactive refunds of, or prospective adjustments to, Medicare Advantage premium payments made to us, the effect of any such refunds or adjustments on the actuarial soundness of our Medicare Advantage bids, or whether any RADV audit findings would cause a change to our method of estimating future premium revenue in bid submissions to CMS for the current or future contract years or compromise premium assumptions made in our bids for prior contract years or the current contract year. Any premium refunds or adjustments resulting from regulatory audits, whether as a result of RADV or other audits by CMS, the OIG or otherwise, could be material and could adversely affect our operating results, financial position and cash flows.

ICD-10

CMS has issued a proposed rule which would delay the implementation of an updated and expanded set of standardized diagnosis and procedure codes used for describing health conditions, known as ICD-10, for only one year until October, 2014.

Other Legislative Initiatives

Legislation has been enacted or introduced in New York and at least four other states mandating changes in life insurers' claim payment and related escheat practices, including consultation of certain databases.

FORWARD-LOOKING INFORMATION/RISK FACTORS

Certain information in this MD&A is forward-looking within the meaning of the Private Securities Litigation Reform Act of 1995.  Forward-looking statements are subject to uncertainties that are outside our control and could cause actual future results to differ materially from those statements.  You should not place undue reliance on forward-looking statements, and we disclaim any intention or obligation to update or revise forward-looking statements, whether as a result of new information, future events or otherwise.

The following information supplements the Forward Looking Information/Risk Factors portion of our 2011 Annual Report.  You should read that section of our 2011 Annual Report and the information below carefully because each of them contains a discussion of important risk factors that could adversely affect our business as well as the market price for our common stock.

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We are subject to funding and other risks with respect to revenue received from our participation in Medicaid programs. We are also subject to retroactive adjustments to certain premiums, including as a result of CMS risk adjustment data validation (“RADV”) audits.

The U.S. Supreme Court's June 28, 2012, decision on Health Care Reform permits states to opt out of the elements of Health Care Reform requiring expansion of Medicaid coverage in January 2014 without losing their current federal Medicaid funding, and governors in some states already have indicated that they will not support Medicaid expansion. The ruling also creates uncertainty regarding the effectiveness of Health Care Reform's "maintenance of effort" ("MOE") provision. If states are not subject to the MOE provision and allow certain programs to expire or choose to opt out of Medicaid expansion, we could experience reduced Medicaid enrollment or reduced Medicaid enrollment growth. We cannot predict whether pending or future federal or state legislation or court proceedings will change various aspects of Health Care Reform or state level health care reform, nor can we predict the impact those changes will have on our business operations or financial results, but the effects could be materially adverse.

On February 24, 2012, CMS published a Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation Contract-Level Audits (the "Notice"). The Notice outlines the methodology that CMS will use to determine RADV audit premium refunds payable by Medicare Advantage plans for contract years 2011 and forward. The Notice also provides limited information about an adjustment that will be included in the calculation of RADV premium refunds to account for differences in certain documentation standards. During or after August 2012, CMS will select Medicare Advantage contracts for contract year 2011 for audit. We are currently unable to predict which of our Medicare Advantage contracts will be selected for future audit, the financial impact of that documentation standard adjustment, the amounts of any retroactive refunds of, or prospective adjustments to, Medicare Advantage premium payments made to us, the effect of any such refunds or adjustments on the actuarial soundness of our Medicare Advantage bids, or whether any RADV audit findings would cause a change to our method of estimating future premium revenue in bid submissions to CMS for the current or future contract years or compromise premium assumptions made in our bids for prior contract years or the current contract year. Any premium refunds or adjustments resulting from regulatory audits, whether as a result of RADV or other audits by CMS, the OIG or otherwise, could be material and could adversely affect our operating results, financial position and cash flows. For more information see "Regulatory Environment - Medicare" beginning on page 40.

Our business success and profitability depend in part on continuing to develop and implement improvements in technology, including ICD-10.

CMS has issued a proposed rule which would delay the implementation of ICD-10 for only one year until October, 2014. Implementing ICD-10 has required and will continue to require a substantial investment of resources by us and the health and related benefits industry in general over the next several years, including significant information technology investments, changes in business processes and documentation and extensive employee education and training. If we and/or the health and related benefits industry fail to adequately implement ICD-10 or if the implementation date of ICD-10 is postponed significantly beyond October 2014, we may suffer a significant loss in the resources invested and in productivity, and/or fluctuations in our cash flows.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We have not experienced any material changes in exposures to market risk since December 31, 2011.  Refer to the information contained in the “Risk Management and Market-Sensitive Instruments” section of the MD&A beginning on page 38 for a discussion of our exposures to market risk.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

We maintain disclosure controls and procedures, which are designed to ensure that information that we are required to disclose in the reports we file or submit under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

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An evaluation of the effectiveness of our disclosure controls and procedures as of June 30, 2012 was conducted under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer.  Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures as of June 30, 2012 were effective and designed to ensure that material information relating to Aetna Inc. and its consolidated subsidiaries would be made known to the Chief Executive Officer and Chief Financial Officer by others within those entities, particularly during the periods when periodic reports under the Exchange Act are being prepared.  Refer to the Certifications by our Chief Executive Officer and Chief Financial Officer filed as Exhibits 31.1 and 31.2 to this report.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting identified in connection with the evaluation of such control that occurred during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Part II. Other Information

Item 1. Legal Proceedings

The information contained in Note 12 of Condensed Notes to Consolidated Financial Statements, beginning on page 21 is incorporated herein by reference.

Item 1A. Risk Factors

The information contained under the heading “Forward-Looking Information/Risk Factors” in the MD&A, beginning on page 41 is incorporated herein by reference.

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

The following table provides information about our monthly share repurchases, all of which were purchased as part of a publicly-announced program, for the three months ended June 30, 2012:

Issuer Purchases of Equity Securities
(Millions, except per share amounts)	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs
April 1, 2012 - April 30, 2012	.9	$	43.83	.9	$	788.4
May 1, 2012 - May 31, 2012	9.5	42.10		9.5	388.5
June 1, 2012 - June 30, 2012	3.4	41.78		3.4	247.7
Total	13.8	$	42.14	13.8	N/A

Our Board of Directors authorized three separate share repurchase programs on September 23, 2011, February 24, 2012 and July 27, 2012. Each repurchase program authorized us to repurchase up to $750 million of our common stock.  During the three months ended June 30, 2012, we repurchased approximately 14 million shares of common stock at a cost of approximately $581 million.  At June 30, 2012, we had remaining authorization to repurchase an aggregate of up to approximately $248 million of common stock under the February 24, 2012 program.

Item 4.        Mine Safety Disclosures

Not Applicable.

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Item 6. Exhibits

Exhibits to this Form 10-Q are as follows:

4	Instruments defining the rights of security holders, including indentures
4.1	Supplemental Indenture dated as of May 4, 2012 between Aetna Inc. and U.S. Bank National Association, as successor-in-interest to State Street Bank and Trust Company, as trustee, establishing and designating Aetna Inc.'s 1.750% Senior Notes due May 15, 2017 and 4.500% Senior Notes due May 15, 2042, incorporated by reference to Exhibit 4.1 to Aetna Inc.'s Form 8-K filed on May 4, 2012.
11	Statements re: computation of per share earnings
11.1	Computation of per share earnings is incorporated herein by reference to Note 3 of Condensed Notes to Consolidated Financial Statements, beginning on page 8 in this Form 10-Q.
12	Statements re: computation of ratios
12.1	Computation of ratio of earnings to fixed charges.
15	Letter re: unaudited interim financial information
15.1	Letter from KPMG LLP acknowledging awareness of the use of a report dated July 31, 2012 related to their review of interim financial information.
31	Rule 13a-14(a)/15d-14(a) Certifications
31.1	Certification.
31.2	Certification.
32	Section 1350 Certifications
32.1	Certification.
32.2	Certification.
101	XBRL Documents
101.INS	XBRL Instance Document.
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.

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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.

Aetna Inc.

Registrant

Date:	July 31, 2012	By	/s/ Rajan Parmeswar
			Rajan Parmeswar
			Vice President, Controller and
			Chief Accounting Officer

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INDEX TO EXHIBITS
Exhibit		Filing
Number	Description	Method

12	Statements re: computation of ratios
12.1	Computation of ratio of earnings to fixed charges.	Electronic
15	Letter re: unaudited interim financial information
15.1	Letter from KPMG LLP acknowledging awareness of the use of a report dated July 31, 2012 related to their review of interim financial information.	Electronic
31	Rule 13a-14(a)/15d-14(a) Certifications
31.1	Certification.	Electronic
31.2	Certification.	Electronic
32	Section 1350 Certifications
32.1	Certification.	Electronic
32.2	Certification.	Electronic
101	XBRL Documents
101.INS	XBRL Instance Document.	Electronic
101.SCH	XBRL Taxonomy Extension Schema.	Electronic
101.CAL	XBRL Taxonomy Extension Calculation Linkbase.	Electronic
101.DEF	XBRL Taxonomy Extension Definition Linkbase.	Electronic
101.LAB	XBRL Taxonomy Extension Label Linkbase.	Electronic
101.PRE	XBRL Taxonomy Extension Presentation Linkbase.	Electronic

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EX-12.1

Exhibit 12.1

Computation of Ratios

The computation of the ratio of earnings to fixed charges for the six months ended June 30, 2012 and the years ended December 31, 2011, 2010, 2009, 2008 and 2007 are as follows:

Six Months Ended			Years Ended December 31,
(Millions)	June 30, 2012		2011		2010		2009		2008		2007
Income from continuing operations before income taxes	$	1,480.0	$	3,077.8	$	2,644.2	$	1,901.2	$	2,174.2	$	2,796.4
Add back fixed charges	148.3		293.6		307.7		302.9		297.9		234.3
Income as adjusted ("earnings")	$	1,628.3	$	3,371.4	$	2,951.9	$	2,204.1	$	2,472.1	$	3,030.7
Fixed charges:
Interest expense	123.7		$	246.9	$	254.6	$	243.4	$	236.4	$	180.6
Portion of rents representative of interest factor	24.6		46.7		53.1		59.5		61.5		53.7
Total fixed charges	$	148.3	$	293.6	$	307.7	$	302.9	$	297.9	$	234.3
Ratio of earnings to fixed charges	10.98		11.48		9.59		7.28		8.30		12.94

EX-15.1

Exhibit 15.1

Aetna Inc.

Hartford, Connecticut

Re: Registration Statement No. 333-52120, 52122, 52124, 73052, 87722, 87726, 124619, 124620, 136176, 136177, 168497, 168498, 176009, 176011 and 178272

With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated July 31, 2012 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

Hartford, Connecticut

July 31, 2012

EX-31.1

Exhibit 31.1

Certification

I, Mark T. Bertolini, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aetna Inc.;

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(s) 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(s) 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:	July 31, 2012	/s/ Mark T. Bertolini
		Mark T. Bertolini
		Chairman, Chief Executive Officer and President

EX-31.2

Exhibit 31.2

Certification

I, Joseph M. Zubretsky, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aetna Inc.;

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(s) 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(s) 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:	July 31, 2012	/s/ Joseph M. Zubretsky
		Joseph M. Zubretsky
		Senior Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification

The certification set forth below is being submitted to the Securities and Exchange Commission in connection with the Quarterly Report on Form 10-Q of Aetna Inc. for the period ended June 30, 2012 (the “Report”) solely for the purpose of complying with Rule 13a-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Mark T. Bertolini, Chairman, Chief Executive Officer and President of Aetna Inc., certifies that, to the best of his knowledge:

1. the Report fully complies with the requirements of Section 13(a) of the Exchange Act; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Aetna Inc.

Date:	July 31, 2012	/s/ Mark T. Bertolini
		Mark T. Bertolini
		Chairman, Chief Executive Officer and President

EX-32.2

Exhibit 32.2

Certification

The certification set forth below is being submitted to the Securities and Exchange Commission in connection with the Quarterly Report on Form 10-Q of Aetna Inc. for the period ended June 30, 2012 (the “Report”) solely for the purpose of complying with Rule 13a-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Joseph M. Zubretsky, Senior Executive Vice President and Chief Financial Officer of Aetna Inc., certifies that, to the best of his knowledge:

1. the Report fully complies with the requirements of Section 13(a) of the Exchange Act; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Aetna Inc.

Date:	July 31, 2012	/s/ Joseph M. Zubretsky
		Joseph M. Zubretsky
		Senior Executive Vice President and Chief Financial Officer

XML

Investments (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Total Investments [Line Items]
Non-credit related impairments previously recognized in other comprehensive income	$ 25.2	$ 27.6
Current	2,347.0	2,211.8
Long-term investments	18,331.0	18,083.2
Total investments	20,678.0	20,295.0
Debt And Equity Securities Available For Sale [Member]
Total Investments [Line Items]
Current	2,217.3	2,168.1
Long-term investments	15,469.4	15,222.7
Total investments	17,686.7	17,390.8
Mortgage Loans [Member]
Total Investments [Line Items]
Current	125.6	41.7
Long-term investments	1,498.3	1,606.8
Total investments	1,623.9	1,648.5
Other Investments [Member]
Total Investments [Line Items]
Current	4.1	2.0
Long-term investments	1,363.3	1,253.7
Total investments	$ 1,367.4	$ 1,255.7

XML

Debt - Short-term Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Short-term debt	$ 0	$ 425.9
Commercial Paper [Member]
Short-term Debt [Line Items]
Short-term debt		$ 426.0
Short-term Debt, Weighted Average Interest Rate		0.38%

XML

Other Comprehensive (Loss) Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					$ (1,189.2)
Other comprehensive (loss) income	92.8		93.7		134.3		69.1
Balance at end of period	(1,054.9)				(1,054.9)
Net Unrealized Gains (Losses) Previously Impaired Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					58.2	[1]	75.1	[1]
Other comprehensive (loss) income					(0.7)	[1]	(12.3)	[1]
Balance at end of period	57.5	[1]	62.8	[1]	57.5	[1]	62.8	[1]
Net Unrealized Gains (Losses) All Other Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					595.2		375.2
Other comprehensive (loss) income					110.9		64.5
Balance at end of period	706.1		439.7		706.1		439.7
Net Unrealized Gains (Losses) Foreign Currency And Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					(33.7)		(27.3)
Other comprehensive (loss) income					1.1		(2.3)
Balance at end of period	(32.6)		(29.6)		(32.6)		(29.6)
Pension And Opeb Plans Unrecognized Net Actuarial (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					(1,834.6)		(1,614.0)
Other comprehensive (loss) income					24.3		20.5
Balance at end of period	(1,810.3)		(1,593.5)		(1,810.3)		(1,593.5)
Pension And Opeb Plans Unrecognized Prior Service Cost [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					25.7		28.4
Other comprehensive (loss) income					(1.3)		(1.3)
Balance at end of period	24.4		27.1		24.4		27.1
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					(1,189.2)		(1,162.6)
Other comprehensive (loss) income					134.3		69.1
Balance at end of period	$ (1,054.9)		$ (1,093.5)		$ (1,054.9)		$ (1,093.5)

[1] Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

XML

Debt - Line of Credit (Details) (USD $)	6 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended
	Jun. 30, 2012	Mar. 27, 2012	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Minimum [Member] Line of Credit [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Maximum [Member] Line of Credit [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit agreement	$ 1,500,000,000	$ 1,500,000,000
Maximum Amount Of Letters Of Credit Issuable	200,000,000
Line Of Credit Facility Maximum Expandable Borrowing Capacity	2,000,000,000
Facility fee (in hundredths)	0.10%			0.07%		0.15%
Line of Credit Facility, Maximum Amount Outstanding During Period	$ 0
Level the debt to capitalization must be below under the facility agreement			.5		1.0

XML

Investments Investments - Variable Interest Entities (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Long-term investments	$ 18,331,000,000		$ 18,331,000,000		$ 18,083,200,000
Noncontrolling Interest [Abstract]
Investment Holdings Partially Owned By Third Parties	67,000,000		67,000,000		71,000,000
Net Investment Gains Losses Related To Investment Holdings Partially Owned By Third Parties	500,000	800,000	1,500,000	3,000,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Long-term investments	193,000,000		193,000,000		175,000,000
Real Estate Partnerships [Member]
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Variable Interest Entity Assets	5,600,000,000		5,600,000,000		5,100,000,000
Hedge Fund Partnerships [Member]
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Variable Interest Entity Assets	$ 6,800,000,000		$ 6,800,000,000		$ 5,900,000,000

XML

Debt (Tables)

6 Months Ended

Jun. 30, 2012

Debt Disclosure [Abstract]

Carrying Value of Long-Term Debt

The carrying value of our long-term debt at June 30, 2012 and December 31, 2011 was as follows:

(Millions)	June 30, 2012		December 31, 2011
Senior notes, 6.0%, due 2016	$	748.3	$	748.0
Senior notes, 1.75%, due 2017	248.4		—
Senior notes, 6.5%, due 2018	499.1		499.1
Senior notes, 3.95%, due 2020	743.0		742.6
Senior notes, 4.125%, due 2021	493.8		493.4
Senior notes, 6.625%, due 2036	798.7		798.7
Senior notes, 6.75%, due 2037	696.0		695.9
Senior notes, 4.5%, due 2042	479.0		—
Total long-term debt	$	4,706.3	$	3,977.7

XML

Capital Stock - Dividends (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	May 18, 2012	Feb. 24, 2012
Class of Stock Disclosures [Abstract]
Dividends Amount Per Share			$ 0.175	$ 0.175
Total Dividends	$ 59.2	$ 60.8

XML

Subsequent Event (Share Repurchase Program [Domain])

6 Months Ended

Jun. 30, 2012

Share Repurchase Program [Domain]

Subsequent Event [Line Items]

Subsequent Events [Text Block]

16. Subsequent Event

On July 27, 2012, our Board approved a new share repurchase program that authorizes us to repurchase up to $750 million of our common stock. The July 27, 2012 program is in addition to the remaining authorization under the February 24, 2012 program.

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Financial Instruments - Balance Sheet Grouping (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans	$ 1,623.9	$ 1,648.5
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Investment contracts with a fixed maturity	22.3	34.6
Investment contracts without a fixed maturity	538.4	543.9
Long-term debt	4,706.3	3,977.7
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans	1,675.2	1,703.7
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Investment contracts with a fixed maturity	22.5	34.9
Investment contracts without a fixed maturity	552.6	559.4
Long-term debt	5,592.3	4,643.1
Level 1 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Investment contracts with a fixed maturity	0
Investment contracts without a fixed maturity	0
Long-term debt	0
Level 2 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Investment contracts with a fixed maturity	0
Investment contracts without a fixed maturity	0
Long-term debt	5,592.3
Level 3 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans	1,675.2
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Investment contracts with a fixed maturity	22.5
Investment contracts without a fixed maturity	552.6
Long-term debt	$ 0

XML

Investments - Unrealized Loss Position (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 736.4	[1]	$ 1,317.3	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	16.5	[1]	57.7	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	259.0	[1]	306.3	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	35.0	[1]	44.1	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	995.4	[1]	1,623.6	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	51.5	[1]	101.8	[1]
Supporting Discontinued And Experience Rated Products [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	296.6		446.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	30.5		48.2
Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	724.7		1,311.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	15.9		55.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	236.2		285.5
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	29.6		38.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	960.9	[1]	1,596.6	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	45.5	[1]	94.0	[1]
Debt Securities [Member] | Supporting Discontinued And Experience Rated Products [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	262.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	24.7
Debt Securities [Member] | Supporting Remaining Products [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	698.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	20.8
US Government Agencies Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	58.3		14.0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0.2		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15.1		15.1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0.4		0.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	73.4	[1]	29.1	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.6	[1]	0.4	[1]
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	119.9		23.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0.7		0.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	43.4		68.6
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1.5		2.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	163.3	[1]	92.4	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2.2	[1]	3.3	[1]
Domestic Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	296.8		625.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	4.4		25.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	30.4		62.4
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1.8		2.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	327.2	[1]	687.9	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	6.2	[1]	28.1	[1]
Foreign Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	213.5		498.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	10.2		25.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	61.2		55.3
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	10.8		12.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	274.7	[1]	554.1	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	21.0	[1]	38.0	[1]
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5.3		0.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2.4		2.9
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0.1		0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7.7	[1]	3.8	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.1	[1]	0.1	[1]
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14.8		102.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0.3		2.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	57.6		42.8
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	3.0		3.0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	72.4	[1]	145.5	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3.3	[1]	5.8	[1]
Other Asset-Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	12.1		27.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0.1		0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1.6		3.9
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	3.2		3.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.7	[1]	31.7	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3.3	[1]	3.8	[1]
Redeemable Preferred Stock [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4.0		17.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0		0.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	24.5		34.5
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	8.8		13.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	28.5	[1]	52.1	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	8.8	[1]	14.5	[1]
Equity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11.7		6.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0.6		2.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	22.8		20.8
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	5.4		5.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	34.5	[1]	27.0	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ 6.0	[1]	$ 7.8	[1]

[1] At June 30, 2012 and December 31, 2011, debt and equity securities in an unrealized capital loss position of $30.5 million and $48.2 million, respectively, and with related fair value of $296.6 million and $446.1 million, respectively, related to experience-rated and discontinued products.

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Earnings Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 457.6		$ 536.7		$ 968.6		$ 1,122.7
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares used to compute basic EPS (in shares)	341.7		379.2		346.0		381.3
Dilutive effect of outstanding stock-based compensation awards (in shares)	4.5	[1]	8.1	[1]	5.5	[1]	7.9	[1]
Weighted average shares used to compute diluted EPS (in shares)	346.2		387.3		351.5		389.2
Basic EPS (in dollars per share)	$ 1.34		$ 1.42		$ 2.80		$ 2.94
Diluted EPS (in dollars per share)	$ 1.32		$ 1.39		$ 2.76		$ 2.88
Stock Appreciation Rights [Member]
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	7.5		12.6		7.4		12.8

[1] Stock-based compensation awards are not included in the calculation of diluted EPS if the exercise price is greater than the average market price of Aetna common shares during the period (i.e., the awards are anti-dilutive). Approximately 7.5 million and 7.4 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2012, respectively, and 12.6 million and 12.8 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2011, respectively, because they were anti-dilutive.

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Pension and Other Postretirement Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 0	$ 0	$ 0	$ 0
Amortization of prior service cost	(0.1)	(0.1)	(0.2)	(0.2)
Interest cost	74.6	78.1	149.2	156.2
Expected Return on Plan Assets	(96.9)	(95.9)	(193.7)	(191.9)
Amortization of net actuarial losses	17.7	14.6	35.2	29.2
Net periodic benefit (income) cost	(4.7)	(3.3)	(9.5)	(6.7)
OPEB Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0.1	0	0.1	0.1
Amortization of prior service cost	(0.9)	(0.8)	(1.8)	(1.8)
Interest cost	3.6	4.1	7.2	8.3
Expected Return on Plan Assets	(0.8)	(0.9)	(1.4)	(1.8)
Amortization of net actuarial losses	1.1	1.2	2.2	2.4
Net periodic benefit (income) cost	$ 3.1	$ 3.6	$ 6.3	$ 7.2

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Segment Information - Reconciliation of Operating Earnings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Earnings	$ 452.0	[1]	$ 522.8	[1]	$ 929.4	[1]	$ 1,083.0	[1]
Reconciliation from Segment Totals to Consolidated [Abstract]
Net Realized Capital Gains, After Tax	5.6		13.9		39.2		39.7
Net income	$ 457.6		$ 536.7		$ 968.6		$ 1,122.7

[1] Operating earnings (loss) excludes net realized capital gains or losses and the other items described in the reconciliation on page 25.

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Investments - Investment Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 230.4		$ 248.5		$ 478.3		$ 508.6
Less: investment expenses	(7.6)		(7.2)		(14.9)		(14.7)
Net Investment Income	222.8	[1]	241.3	[1]	463.4	[1]	493.9	[1]
Debt Securities [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	191.8		212.1		388.7		423.4
Mortgage Loans [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	26.9		24.6		65.5		49.3
Other Investments [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	11.7		11.8		24.1		35.9
Supporting Discontinued And Experience Rated Products [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net Investment Income	$ 77.1		$ 80.4		$ 157.8		$ 167.0

[1] Net investment income includes $77.1 million and $157.8 million for the three and six months ended June 30, 2012, respectively, and $80.4 million and $167.0 million for the three and six months ended June 30, 2011, respectively, related to investments supporting our experience-rated and discontinued products.

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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 968.6	$ 1,122.7
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized capital gains	(60.3)	(61.1)
Depreciation and amortization	226.7	214.9
Equity in earnings of affiliates, net	(11.3)	(24.5)
Stock-based compensation expense	64.5	74.7
Amortization (accretion) of net investment premium (discount)	8.9	(2.6)
Changes in assets and liabilities:
Accrued investment income	7.6	(1.2)
Premiums due and other receivables	(139.8)	(313.0)
Income taxes	108.6	168.7
Other assets and other liabilities	(559.1)	(189.0)
Health care and insurance liabilities	492.9	(103.4)
Other, net	2.7	10.3
Net cash provided by operating activities	1,110.0	896.5
Cash flows from investing activities:
Proceeds from sales and maturities of investments	5,620.0	4,947.1
Cost of investments	(5,582.7)	(5,046.5)
Additions to property, equipment and software	(150.8)	(137.1)
Cash used for acquisition, net of cash acquired	0	(1,098.2)
Net cash used for investing activities	(113.5)	(1,334.7)
Cash flows from financing activities:
Net repayment of long-term debt	0	(900.0)
Net issuance of long-term debt	712.9	480.1
Net (repayment) issuance of short-term debt	(425.9)	549.8
Deposits and interest credited for investment contracts	2.7	2.6
Withdrawals of investment contracts	(12.8)	(5.3)
Common shares under benefit plans, net	(18.5)	96.6
Stock-based compensation tax benefits	30.3	15.3
Common shares repurchased	(924.5)	(701.0)
Dividends paid to shareholders	(122.1)	(57.0)
Collateral on interest rate swaps	3.8	0
Net cash used for financing activities	(754.1)	(518.9)
Net increase (decrease) in cash and cash equivalents	242.4	(957.1)
Cash and cash equivalents, beginning of period	679.7	1,867.6
Cash and cash equivalents, end of period	922.1	910.5
Supplemental cash flow information:
Interest paid	117.0	136.4
Income taxes paid	$ 371.3	$ 413.6

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Reinsurance (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jan. 31, 2012
Reinsurance Disclosures [Abstract]
Collateralized excess of loss on resinsurance coverage		$ 150
Statement [Line Items]
Amount of insurance policies that are reinsured by an unrelated party (in percent)	0.50

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Investments - Unrealized Loss Position Maturities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ 51.5	[1]	$ 101.8	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	995.4	[1]	1,623.6	[1]
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	45.5	[1]	94.0	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	960.9	[1]	1,596.6	[1]
Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	20.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	698.5
Supporting Discontinued And Experience Rated Products [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	30.5		48.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	296.6		446.1
Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	24.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	262.4
Maturing in Less than one Year [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.1
Maturing in Less than one Year [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.1
Maturing in Less than one Year [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	0
Maturing in One Through Five Years [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	219.8
Maturing in One Through Five Years [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	197.8
Maturing in One Through Five Years [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22.0
Maturing After Five Years Through Ten Years [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	5.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	279.1
Maturing After Five Years Through Ten Years [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	4.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	212.9
Maturing After Five Years Through Ten Years [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	1.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	66.2
Maturing in Greater Than Ten Years [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	30.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	355.1
Maturing in Greater Than Ten Years [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	7.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	194.5
Maturing in Greater Than Ten Years [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	22.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	160.6
Residential Mortgage Backed Securities [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7.7
Residential Mortgage Backed Securities [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7.7
Residential Mortgage Backed Securities [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	0
Commercial Mortgage Backed Securities [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	72.4
Commercial Mortgage Backed Securities [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	59.4
Commercial Mortgage Backed Securities [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.0
Other Asset-Backed Securities [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.7
Other Asset-Backed Securities [Member] | Supporting Remaining Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13.1
Other Asset-Backed Securities [Member] | Supporting Discontinued And Experience Rated Products [Member] | Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 0.6

[1] At June 30, 2012 and December 31, 2011, debt and equity securities in an unrealized capital loss position of $30.5 million and $48.2 million, respectively, and with related fair value of $296.6 million and $446.1 million, respectively, related to experience-rated and discontinued products.

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Investments (Tables)

6 Months Ended

Jun. 30, 2012

Investments [Abstract]

Total investments

Total investments at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012						December 31, 2011
(Millions)	Current		Long-term		Total		Current		Long-term		Total
Debt and equity securities available for sale	$	2,217.3	$	15,469.4	$	17,686.7	$	2,168.1	$	15,222.7	$	17,390.8
Mortgage loans	125.6		1,498.3		1,623.9		41.7		1,606.8		1,648.5
Other investments	4.1		1,363.3		1,367.4		2.0		1,253.7		1,255.7
Total investments	$	2,347.0	$	18,331.0	$	20,678.0	$	2,211.8	$	18,083.2	$	20,295.0

Debt and equity securities available for sale

Debt and equity securities available for sale at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses				Fair Value
June 30, 2012
Debt securities:
U.S. government securities	$	1,542.1	$	168.8	$	(.6	)		$	1,710.3
States, municipalities and political subdivisions	2,662.6		242.5		(2.2		)		2,902.9
U.S. corporate securities	6,269.8		764.3		(6.2		)		7,027.9
Foreign securities	2,695.7		312.3		(21.0		)		2,987.0
Residential mortgage-backed securities	945.3		53.7		(.1		)		998.9
Commercial mortgage-backed securities	1,259.3		121.7		(3.3		)	(1)	1,377.7
Other asset-backed securities	480.8		25.0		(3.3		)	(1)	502.5
Redeemable preferred securities	125.8		10.8		(8.8		)		127.8
Total debt securities	15,981.4		1,699.1		(45.5		)		17,635.0
Equity securities	47.3		10.4		(6.0		)		51.7
Total debt and equity securities (2)	$	16,028.7	$	1,709.5	$	(51.5	)		$	17,686.7
December 31, 2011
Debt securities:
U.S. government securities	$	1,394.7	$	165.0	$	(.4	)		$	1,559.3
States, municipalities and political subdivisions	2,654.9		208.5		(3.3		)		2,860.1
U.S. corporate securities	6,484.0		718.2		(28.1		)		7,174.1
Foreign securities	2,614.9		278.2		(38.0		)		2,855.1
Residential mortgage-backed securities	849.8		51.1		(.1		)		900.8
Commercial mortgage-backed securities	1,295.3		98.3		(5.8		)	(1)	1,387.8
Other asset-backed securities	437.0		20.6		(3.8		)	(1)	453.8
Redeemable preferred securities	164.2		12.6		(14.5		)		162.3
Total debt securities	15,894.8		1,552.5		(94.0		)		17,353.3
Equity securities	40.3		5.0		(7.8		)		37.5
Total debt and equity securities (2)	$	15,935.1	$	1,557.5	$	(101.8	)		$	17,390.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, we held securities for which we previously recognized $25.2 million and $27.6 million, respectively, of non-credit related impairments in accumulated other comprehensive loss. These securities had a net unrealized capital gain at June 30, 2012 and December 31, 2011 of $7.7 million and $7.4 million, respectively.

⁽²⁾  Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products).  At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products.  Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

Fair value of debt securities by contractual maturity

The fair value of debt securities at June 30, 2012 is shown below by contractual maturity.  Actual maturities may differ from contractual maturities because securities may be restructured, called or prepaid.

(Millions)	Fair Value
Due to mature:
Less than one year	$	871.7
One year through five years	3,641.4
After five years through ten years	5,065.9
Greater than ten years	5,176.9
Residential mortgage-backed securities	998.9
Commercial mortgage-backed securities	1,377.7
Other asset-backed securities	502.5
Total	$	17,635.0

Debt and Equity Securities in an Unrealized Capital Loss Position

Summarized below are the debt and equity securities we held at June 30, 2012 and December 31, 2011 that were in an unrealized capital loss position, aggregated by the length of time the investments have been in that position:

	Less than 12 months				Greater than 12 months				Total (1)
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2012
Debt securities:
U.S. government securities	$	58.3	$	.2	$	15.1	$	.4	$	73.4	$	.6
States, municipalities and political subdivisions	119.9		.7		43.4		1.5		163.3		2.2
U.S. corporate securities	296.8		4.4		30.4		1.8		327.2		6.2
Foreign securities	213.5		10.2		61.2		10.8		274.7		21.0
Residential mortgage-backed securities	5.3		—		2.4		.1		7.7		.1
Commercial mortgage-backed securities	14.8		.3		57.6		3.0		72.4		3.3
Other asset-backed securities	12.1		.1		1.6		3.2		13.7		3.3
Redeemable preferred securities	4.0		—		24.5		8.8		28.5		8.8
Total debt securities	724.7		15.9		236.2		29.6		960.9		45.5
Equity securities	11.7		.6		22.8		5.4		34.5		6.0
Total debt and equity securities (1)	$	736.4	$	16.5	$	259.0	$	35.0	$	995.4	$	51.5
December 31, 2011
Debt securities:
U.S. government securities	$	14.0	$	—	$	15.1	$	.4	$	29.1	$	.4
States, municipalities and political subdivisions	23.8		.4		68.6		2.9		92.4		3.3
U.S. corporate securities	625.5		25.7		62.4		2.4		687.9		28.1
Foreign securities	498.8		25.4		55.3		12.6		554.1		38.0
Residential mortgage-backed securities	.9		—		2.9		.1		3.8		.1
Commercial mortgage-backed securities	102.7		2.8		42.8		3.0		145.5		5.8
Other asset-backed securities	27.8		.1		3.9		3.7		31.7		3.8
Redeemable preferred securities	17.6		.9		34.5		13.6		52.1		14.5
Total debt securities	1,311.1		55.3		285.5		38.7		1,596.6		94.0
Equity securities	6.2		2.4		20.8		5.4		27.0		7.8
Total debt and equity securities (1)	$	1,317.3	$	57.7	$	306.3	$	44.1	$	1,623.6	$	101.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, debt and equity securities in an unrealized capital loss position of $30.5 million and $48.2 million, respectively, and with related fair value of $296.6 million and $446.1 million, respectively, related to experience-rated and discontinued products.

Maturity dates for debt securities

The maturity dates for debt securities in an unrealized capital loss position at June 30, 2012 were as follows:

	Supporting discontinued and experience-rated products				Supporting remaining products				Total
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Due to mature:
Less than one year	$	—	$	—	$	13.1	$	.1	$	13.1	$	.1
One year through five years	22.0		.2		197.8		2.6		219.8		2.8
After five years through ten years	66.2		1.2		212.9		4.1		279.1		5.3
Greater than ten years	160.6		22.8		194.5		7.8		355.1		30.6
Residential mortgage-backed securities	—		—		7.7		.1		7.7		.1
Commercial mortgage-backed securities	13.0		.5		59.4		2.8		72.4		3.3
Other asset-backed securities	.6		—		13.1		3.3		13.7		3.3
Total	$	262.4	$	24.7	$	698.5	$	20.8	$	960.9	$	45.5

Net realized capital gains (losses)

Net realized capital gains for the three and six months ended June 30, 2012 and 2011, excluding amounts related to experience-rated contract holders and discontinued products, were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
OTTI losses on debt securities	$	(2.0	)	$	(1.7	)	$	(8.6	)	$	(4.5	)
Portion of OTTI losses on debt securities recognized   in other comprehensive income	.1			—			.1			—
Net OTTI losses on debt securities recognized in earnings	(1.9		)	(1.7		)	(8.5		)	(4.5		)
Net realized capital gains, excluding OTTI losses on debt securities	10.5			23.1			68.8			65.6
Net realized capital gains	$	8.6		$	21.4		$	60.3		$	61.1

Proceeds and related gross realized capital gains and losses from the sale of debt securities

Excluding amounts related to experience-rated and discontinued products, proceeds from the sale of debt securities and the related gross realized capital gains and losses for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Proceeds on sales	$	1,075.5	$	1,577.5	$	2,815.3	$	3,091.9
Gross realized capital gains	41.0		55.4		104.9		109.2
Gross realized capital losses	5.4		6.3		11.3		25.1

Activity in mortgage loan portfolio

 During the three and six months ended June 30, 2012 and 2011 we had the following activity in our mortgage loan portfolio:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
New mortgage loans	$	22.6	$	52.8	$	60.5	$	128.5
Mortgage loans fully repaid	10.8		4.7		37.3		39.2
Mortgage loans foreclosed	16.7		—		16.7		—

Mortgage loan internal credit rating

Based upon our most recent assessments at June 30, 2012 and December 31, 2011, our mortgage loans were given the following credit quality indicators:

(In Millions, except credit ratings indicator)	June 30, 2012		December 31, 2011
1	$	111.4	$	95.6
2 to 4	1,435.3		1,426.1
5	50.6		97.1
6 and 7	26.6		29.7
Total	$	1,623.9	$	1,648.5

Net Investment Income [Text Block]

Sources of net investment income for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
Debt securities	$	191.8		$	212.1		$	388.7		$	423.4
Mortgage loans	26.9			24.6			65.5			49.3
Other investments	11.7			11.8			24.1			35.9
Gross investment income	230.4			248.5			478.3			508.6
Less: investment expenses	(7.6		)	(7.2		)	(14.9		)	(14.7		)
Net investment income (1)	$	222.8		$	241.3		$	463.4		$	493.9

⁽¹⁾  Net investment income includes $77.1 million and $157.8 million for the three and six months ended June 30, 2012, respectively, and $80.4 million and $167.0 million for the three and six months ended June 30, 2011, respectively, related to investments supporting our experience-rated and discontinued products.

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Operating Expenses (Tables)

6 Months Ended

Jun. 30, 2012

Operating Expenses [Abstract]

Operating Expenses

For the three and six months ended June 30, 2012 and 2011, selling expenses (which include broker commissions, the variable component of our internal sales force compensation and premium taxes) and general and administrative expenses were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Selling expenses	$	271.4	$	267.2	$	547.7	$	557.9
General and administrative expenses:
Salaries and related benefits	754.2		786.8		1,556.3		1,550.6
Other general and administrative expenses	620.8		537.7		1,208.4		1,046.7
Total general and administrative expenses	1,375.0		1,324.5		2,764.7		2,597.3
Total operating expenses	$	1,646.4	$	1,591.7	$	3,312.4	$	3,155.2

XML

Capital Stock - Repurchases (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	6 Months Ended		3 Months Ended
	Sep. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 750,000,000	$ 750,000,000
Stock Repurchased During Period, Shares		21.0
Stock Repurchased During Period, Value		924,500,000	735,000,000	925,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 248,000,000

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Investments - Realized Gains (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Otti Losses On Securities	$ (2.0)	$ (1.7)	$ (8.6)	$ (4.5)
Portion Of Otti Losses Recognized In Other Comprehensive Income	0.1	0	0.1	0
Net Otti Losses On Securities Recognized In Earnings	(1.9)	(1.7)	(8.5)	(4.5)
Net Realized Capital Gains Losses Excluding Otti Losses On Securities	10.5	23.1	68.8	65.6
Realized Investment Gains (Losses)	8.6	21.4	60.3	61.1
Proceeds On Sales	1,075.5	1,577.5	2,815.3	3,091.9
Debt Securities [Member]
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Gross Realized Capital Gains	41.0	55.4	104.9	109.2
Gross Realized Capital Losses	$ 5.4	$ 6.3	$ 11.3	$ 25.1

XML

Other Comprehensive (Loss) Income (Tables)

6 Months Ended

Jun. 30, 2012

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Shareholders’ equity included the following activity in accumulated other comprehensive loss (excluding amounts related to experience-rated contract holders and discontinued products) for the six months ended June 30, 2012 and 2011:

	Net Unrealized Gains (Losses)									Pension and OPEB Plans							Total Accumulated Other Comprehensive (Loss) Income
	Securities					Foreign Currency and Derivatives
(Millions)	Previously Impaired (1)			All Other					Unrecognized Net Actuarial Losses				Unrecognized Prior Service Cost
Six months ended June 30, 2012
Balance at December 31, 2011	$	58.2		$	595.2	$	(33.7	)		$	(1,834.6	)		$	25.7		$	(1,189.2	)
Other comprehensive (loss) income	(.7		)	110.9		1.1				24.3				(1.3		)	134.3
Balance at June 30, 2012	$	57.5		$	706.1	$	(32.6	)		$	(1,810.3	)		$	24.4		$	(1,054.9	)
Six months ended June 30, 2011
Balance at December 31, 2010	$	75.1		$	375.2	$	(27.3	)		$	(1,614.0	)		$	28.4		$	(1,162.6	)
Other comprehensive (loss) income	(12.3		)	64.5		(2.3		)		20.5				(1.3		)	69.1
Balance at June 30, 2011	$	62.8		$	439.7	$	(29.6	)		$	(1,593.5	)		$	27.1		$	(1,093.5	)

⁽¹⁾  Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

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Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets

Financial assets and liabilities measured at fair value on a recurring basis in our balance sheets at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Debt securities:
U.S. government securities	$	1,427.5	$	282.8	$	—	$	1,710.3
States, municipalities and political subdivisions	—		2,901.3		1.6		2,902.9
U.S. corporate securities	—		6,968.9		59.0		7,027.9
Foreign securities	—		2,925.6		61.4		2,987.0
Residential mortgage-backed securities	—		998.9		—		998.9
Commercial mortgage-backed securities	—		1,351.7		26.0		1,377.7
Other asset-backed securities	—		471.3		31.2		502.5
Redeemable preferred securities	—		112.1		15.7		127.8
Total debt securities	1,427.5		16,012.6		194.9		17,635.0
Equity securities	18.4		—		33.3		51.7
Derivatives	2.2		1.9		—		4.1
Total	$	1,448.1	$	16,014.5	$	228.2	$	17,690.8
Liabilities:
Derivatives	$	—	$	.5	$	—	$	.5
December 31, 2011
Assets:
Debt securities:
U.S. government securities	$	1,307.0	$	252.3	$	—	$	1,559.3
States, municipalities and political subdivisions	—		2,858.4		1.7		2,860.1
U.S. corporate securities	—		7,122.5		51.6		7,174.1
Foreign securities	—		2,805.7		49.4		2,855.1
Residential mortgage-backed securities	—		900.8		—		900.8
Commercial mortgage-backed securities	—		1,358.3		29.5		1,387.8
Other asset-backed securities	—		419.4		34.4		453.8
Redeemable preferred securities	—		146.6		15.7		162.3
Total debt securities	1,307.0		15,864.0		182.3		17,353.3
Equity securities	.8		—		36.7		37.5
Derivatives	—		2.0		—		2.0
Total	$	1,307.8	$	15,866.0	$	219.0	$	17,392.8
Liabilities:
Derivatives	$	—	$	.1	$	—	$	.1

Carrying Value and Estimated Fair Value of Certain Financial Instruments

The carrying value and estimated fair value classified by level of fair value hierarchy for certain of our financial instruments at June 30, 2012 was as follows:

	Carrying Value		Estimated Fair Value
(Millions)			Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Mortgage loans	$	1,623.9	$	—	$	—	$	1,675.2	$	1,675.2
Liabilities:
Investment contract liabilities:
With a fixed maturity	22.3		—		—		22.5		22.5
Without a fixed maturity	538.4		—		—		552.6		552.6
Long-term debt	4,706.3		—		5,592.3		—		5,592.3

The carrying value and estimated fair value of certain of our financial instruments at December 31, 2011 was as follows:

	December 31, 2011
	Carrying		Estimated
(Millions)	Value		Fair Value
Assets:
Mortgage loans	$	1,648.5	$	1,703.7
Liabilities:
Investment contract liabilities:
With a fixed maturity	34.6		34.9
Without a fixed maturity	543.9		559.4
Long-term debt	3,977.7		4,643.1

Separate Account Financial Assets

Separate Accounts financial assets at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012										December 31, 2011
(Millions)	Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
Debt securities	$	902.4	$	3,135.0		$	—	$	4,037.4		$	1,079.1	$	2,817.8		$	—	$	3,896.9
Equity securities	208.2		.6			—		208.8			240.0		—			—		240.0
Derivatives	—		(2.6		)	—		(2.6		)	—		(5.0		)	—		(5.0		)
Common/collective trusts	—		692.1			—		692.1			—		696.0			—		696.0
Total (1)	$	1,110.6	$	3,825.1		$	—	$	4,935.7		$	1,319.1	$	3,508.8		$	—	$	4,827.9

⁽¹⁾  Excludes $385.4 million and $390.3 million of cash and cash equivalents and other receivables at June 30, 2012 and December 31, 2011, respectively.

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Consolidated Statements of Shareholders' Equity (Unaudited) (USD $) In Millions, except Share data, unless otherwise specified	Total USD ($)	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Loss [Member] USD ($)
Balance at beginning of period at Dec. 31, 2010	$ 9,890.8		$ 651.5	$ 10,401.9	$ (1,162.6)
Balance at beginning of period (in shares) at Dec. 31, 2010		384,400,000
Comprehensive income:
Net income	1,122.7		0	1,122.7	0
Other comprehensive income (loss) (Note 6):
Other comprehensive (loss) income	69.1		0	0	69.1
Common shares issued for benefit plans, including tax benefits	189.7		189.7	0	0
Common shares issued for benefit plans, including tax benefits (in shares)		6,400,000
Repurchases of common shares	(735.0)		(0.2)	(734.8)	0
Repurchases of common shares (in shares)		(17,900,000)
Dividends declared	(113.8)		0	(113.8)	0
Balance at end of period at Jun. 30, 2011	10,423.5		841.0	10,676.0	(1,093.5)
Balance at end of period (in shares) at Jun. 30, 2011		372,900,000
Balance at beginning of period at Dec. 31, 2011	10,120.2		962.8	10,346.6	(1,189.2)
Balance at beginning of period (in shares) at Dec. 31, 2011	349,700,000	349,700,000
Comprehensive income:
Net income	968.6		0	968.6	0
Other comprehensive income (loss) (Note 6):
Other comprehensive (loss) income	134.3		0	0	134.3
Common shares issued for benefit plans, including tax benefits	77.2		77.2	0	0
Common shares issued for benefit plans, including tax benefits (in shares)		5,700,000
Repurchases of common shares	(924.5)		(0.2)	(924.3)	0
Repurchases of common shares (in shares)	(21,000,000)	(21,200,000)
Dividends declared	(120.0)		0	(120.0)	0
Balance at end of period at Jun. 30, 2012	$ 10,255.8		$ 1,039.8	$ 10,270.9	$ (1,054.9)
Balance at end of period (in shares) at Jun. 30, 2012	334,200,000	334,200,000

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Pension and Other Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Components of net periodic benefit cost

Components of the net periodic benefit (income) cost of our tax-qualified noncontributory defined benefit pension plans and other postretirement benefit (“OPEB”) plans for the three and six months ended June 30, 2012 and 2011 were as follows:

	Pension Plans												OPEB Plans
	Three Months Ended						Six Months Ended						Three Months Ended						Six Months Ended
	June 30,						June 30,						June 30,						June 30,
(Millions)	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	—		$	—		$	—		$	—		$	.1		$	—		$	.1		$	.1
Amortization of prior service cost	(.1		)	(.1		)	(.2		)	(.2		)	(.9		)	(.8		)	(1.8		)	(1.8		)
Interest cost	74.6			78.1			149.2			156.2			3.6			4.1			7.2			8.3
Expected return on plan assets	(96.9		)	(95.9		)	(193.7		)	(191.9		)	(.8		)	(.9		)	(1.4		)	(1.8		)
Recognized net actuarial losses	17.7			14.6			35.2			29.2			1.1			1.2			2.2			2.4
Net periodic benefit (income) cost	$	(4.7	)	$	(3.3	)	$	(9.5	)	$	(6.7	)	$	3.1		$	3.6		$	6.3		$	7.2

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Investments - Debt and Equity Securities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Non-credit related impairments previously recognized in other comprehensive income	$ 25.2		$ 27.6
Available-for-sale Securities, Amortized Cost Basis	16,028.7	[1]	15,935.1	[1]
Available-for-sale Securities, Gross Unrealized Gains	1,709.5	[1]	1,557.5	[1]
Available-for-sale Securities, Gross Unrealized Losses	(51.5)	[1]	(101.8)	[1]
Available-for-sale Securities, Fair Value Disclosure	17,686.7	[1]	17,390.8	[1]
Net Unrealized Capital (Loss) Gains	7.7		7.4
Supporting Discontinued And Experience Rated Products [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Unrealized Gains	524.0		505.6
Available-for-sale Securities, Gross Unrealized Losses	(30.5)		(48.2)
Available-for-sale Securities, Fair Value Disclosure	4,000.0		4,000.0
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	15,981.4		15,894.8
Available-for-sale Securities, Gross Unrealized Gains	1,699.1		1,552.5
Available-for-sale Securities, Gross Unrealized Losses	(45.5)		(94.0)
Available-for-sale Securities, Fair Value Disclosure	17,635.0		17,353.3
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,542.1		1,394.7
Available-for-sale Securities, Gross Unrealized Gains	168.8		165.0
Available-for-sale Securities, Gross Unrealized Losses	(0.6)		(0.4)
Available-for-sale Securities, Fair Value Disclosure	1,710.3		1,559.3
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,662.6		2,654.9
Available-for-sale Securities, Gross Unrealized Gains	242.5		208.5
Available-for-sale Securities, Gross Unrealized Losses	(2.2)		(3.3)
Available-for-sale Securities, Fair Value Disclosure	2,902.9		2,860.1
Domestic Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	6,269.8		6,484.0
Available-for-sale Securities, Gross Unrealized Gains	764.3		718.2
Available-for-sale Securities, Gross Unrealized Losses	(6.2)		(28.1)
Available-for-sale Securities, Fair Value Disclosure	7,027.9		7,174.1
Foreign Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,695.7		2,614.9
Available-for-sale Securities, Gross Unrealized Gains	312.3		278.2
Available-for-sale Securities, Gross Unrealized Losses	(21.0)		(38.0)
Available-for-sale Securities, Fair Value Disclosure	2,987.0		2,855.1
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	945.3		849.8
Available-for-sale Securities, Gross Unrealized Gains	53.7		51.1
Available-for-sale Securities, Gross Unrealized Losses	(0.1)		(0.1)
Available-for-sale Securities, Fair Value Disclosure	998.9		900.8
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,259.3		1,295.3
Available-for-sale Securities, Gross Unrealized Gains	121.7		98.3
Available-for-sale Securities, Gross Unrealized Losses	(3.3)	[2]	(5.8)	[2]
Available-for-sale Securities, Fair Value Disclosure	1,377.7		1,387.8
Other Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	480.8		437.0
Available-for-sale Securities, Gross Unrealized Gains	25.0		20.6
Available-for-sale Securities, Gross Unrealized Losses	(3.3)	[2]	(3.8)	[2]
Available-for-sale Securities, Fair Value Disclosure	502.5		453.8
Redeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	125.8		164.2
Available-for-sale Securities, Gross Unrealized Gains	10.8		12.6
Available-for-sale Securities, Gross Unrealized Losses	(8.8)		(14.5)
Available-for-sale Securities, Fair Value Disclosure	127.8		162.3
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	47.3		40.3
Available-for-sale Securities, Gross Unrealized Gains	10.4		5.0
Available-for-sale Securities, Gross Unrealized Losses	(6.0)		(7.8)
Available-for-sale Securities, Fair Value Disclosure	$ 51.7		$ 37.5

[1] Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products). At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products. Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

[2] At June 30, 2012 and December 31, 2011, we held securities for which we previously recognized $25.2 million and $27.6 million, respectively, of non-credit related impairments in accumulated other comprehensive loss. These securities had a net unrealized capital gain at June 30, 2012 and December 31, 2011 of $7.7 million and $7.4 million, respectively.

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Debt (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	May 18, 2012	May 04, 2012	Dec. 31, 2011	Mar. 31, 2011
Debt Instrument [Line Items]
Long-term Debt	$ 4,706.3			$ 3,977.7
Number of Interest Rate Derivatives Held					2
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	200		250
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	2
Notional Value of Interest Rate Swap	200		250
Paid to the swap counterparty		7.5
Senior Notes 1.750% Due 2017 [Domain]
Debt Instrument [Line Items]
Long-term Debt	248.4		250.0	0
Debt Instrument, Interest Rate, Stated Percentage	1.75%		1.75%	1.75%
Senior Notes, 6.0%, Due 2016 [Member]
Debt Instrument [Line Items]
Long-term Debt	748.3			748.0
Debt Instrument, Interest Rate, Stated Percentage	6.00%			6.00%
Senior Notes, 6.5%, Due 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt	499.1			499.1
Debt Instrument, Interest Rate, Stated Percentage	6.50%			6.50%
Senior Notes, 3.95%, Due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt	743.0			742.6
Debt Instrument, Interest Rate, Stated Percentage	3.95%			3.95%
Senior Notes, 4.125%, Due 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt	493.8			493.4
Debt Instrument, Interest Rate, Stated Percentage	4.125%			4.125%
Senior Notes, 6.625%, Due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt	798.7			798.7
Debt Instrument, Interest Rate, Stated Percentage	6.625%			6.625%
Senior Notes, 6.75%, Due 2037 [Member]
Debt Instrument [Line Items]
Long-term Debt	696.0			695.9
Debt Instrument, Interest Rate, Stated Percentage	6.75%			6.75%
Senior Notes, 4.5%, Due 2042 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 479.0		$ 500.0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	4.50%		4.50%	4.50%

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Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenue:
Health care premiums	$ 7,167.9		$ 6,733.4		$ 14,355.3		$ 13,484.0
Other premiums	468.7		451.8		945.1		897.1
Fees and other revenue	967.1	[1]	896.5	[1]	1,926.8	[1]	1,796.1	[1]
Net investment income	222.8		241.3		463.4		493.9
Net realized capital gains	8.6		21.4		60.3		61.1
Total revenue	8,835.1		8,344.4		17,750.9		16,732.2
Benefits and expenses:
Health care costs	5,908.3	[2]	5,366.8	[2]	11,765.8	[2]	10,714.8	[2]
Current and future benefits	483.3		477.7		994.2		963.2
Operating expenses:
Selling expenses	271.4		267.2		547.7		557.9
General and administrative expenses	1,375.0		1,324.5		2,764.7		2,597.3
Total operating expenses	1,646.4		1,591.7		3,312.4		3,155.2
Interest expense	64.4		61.5		123.7		127.6
Amortization of other acquired intangible assets	37.0		25.6		74.8		51.9
Total benefits and expenses	8,139.4		7,523.3		16,270.9		15,012.7
Income before income taxes	695.7		821.1		1,480.0		1,719.5
Income taxes:
Current	182.0		226.7		456.5		564.0
Deferred	56.1		57.7		54.9		32.8
Total income taxes	238.1		284.4		511.4		596.8
Net income	$ 457.6		$ 536.7		$ 968.6		$ 1,122.7
Earnings per common share:
Basic	$ 1.34		$ 1.42		$ 2.80		$ 2.94
Diluted	$ 1.32		$ 1.39		$ 2.76		$ 2.88

[1] Fees and other revenue include administrative services contract member co-payments and plan sponsor reimbursements related to our mail order and specialty pharmacy operations of $20.7 million and $39.5 million (net of pharmaceutical and processing costs of $294.3 million and $579.8 million) for the three and six months ended June 30, 2012, respectively, and $14.4 million and $30.0 million (net of pharmaceutical and processing costs of $311.6 million and $620.9 million) for the three and six months ended June 30, 2011, respectively.

[2] Health care costs have been reduced by Insured member co-payments related to our mail order and specialty pharmacy operations of $31.1 million and $68.0 million for the three and six months ended June 30, 2012, respectively, and $32.5 million and $69.6 million for the three and six months ended June 30, 2011, respectively.

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Investments - Mortgage Loans (Details) (Commercial Real Estate [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Movement in Mortgage Loans on Real Estate [Roll Forward]
New Mortgage Loans	$ 22.6	$ 52.8	$ 60.5	$ 128.5
Mortgage loans fully repaid	10.8	4.7	37.3	39.2
Mortgage loans foreclosed	16.7	0	16.7	0
Mortgage Loans on Real Estate	1,623.9		1,623.9		1,648.5
Category 1 [Member]
Movement in Mortgage Loans on Real Estate [Roll Forward]
Mortgage Loans on Real Estate	111.4		111.4		95.6
Category 2 to 4 [Member]
Movement in Mortgage Loans on Real Estate [Roll Forward]
Mortgage Loans on Real Estate	1,435.3		1,435.3		1,426.1
Category 5 [Member]
Movement in Mortgage Loans on Real Estate [Roll Forward]
Mortgage Loans on Real Estate	50.6		50.6		97.1
Categories 6 and 7 [Member]
Movement in Mortgage Loans on Real Estate [Roll Forward]
Mortgage Loans on Real Estate	$ 26.6		$ 26.6		$ 29.7

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Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 922.1	$ 679.7
Investments	2,347.0	2,211.8
Premiums receivable, net	866.8	761.4
Other receivables, net	759.1	701.5
Accrued investment income	188.2	195.8
Income taxes receivable	79.6	161.9
Deferred income taxes	370.7	387.2
Other current assets	941.2	790.7
Total current assets	6,474.7	5,890.0
Long-term investments	18,331.0	18,083.2
Reinsurance recoverables	903.4	921.7
Goodwill	6,202.2	6,203.9
Other acquired intangible assets, net	885.3	958.6
Property and equipment, net	542.2	556.9
Other long-term assets	792.8	760.6
Separate Account Assets	5,321.1	5,218.2
Total assets	39,452.7	38,593.1
Current liabilities:
Health care costs payable	2,883.5	2,675.5
Future policy benefits	661.5	668.0
Unpaid claims	611.2	581.2
Unearned premiums	839.6	369.7
Policyholders' funds	1,268.1	1,281.6
Short-term debt	0	425.9
Accrued expenses and other current liabilities	2,171.2	2,520.3
Total current liabilities	8,435.1	8,522.2
Future policy benefits	6,051.2	6,092.8
Unpaid claims	1,529.9	1,505.8
Policyholders' funds	1,295.4	1,351.6
Long-term debt	4,706.3	3,977.7
Deferred income taxes	341.0	208.8
Other long-term liabilities	1,516.9	1,595.8
Separate Accounts liabilities	5,321.1	5,218.2
Total liabilities	29,196.9	28,472.9
Commitments and contingencies (Note 12)
Shareholders' equity:
Common stock ($.01 par value; 2.6 billion shares authorized and 334.2 million shares issued and outstanding in 2012; 2.6 billion shares authorized and 349.7 million shares issued and outstanding in 2011) and additional paid-in capital	1,039.8	962.8
Retained earnings	10,270.9	10,346.6
Accumulated other comprehensive loss	(1,054.9)	(1,189.2)
Total shareholders' equity	10,255.8	10,120.2
Total liabilities and shareholders' equity	$ 39,452.7	$ 38,593.1

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Dividend Restrictions and Statutory Surplus (Details) (Insurance and HMO [Member], USD $)	3 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Insurance and HMO [Member]
Dividend Restrictions and Statutory Surplus [Line Items]
Dividends available	$ 1,000,000,000
Proceeds from dividends received	501,000,000
Statutory capital and surplus	$ 6,600,000,000	$ 5,900,000,000

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Summarized financial information of segments

Summarized financial information of our segments for the three and six months ended June 30, 2012 and 2011 was as follows:

(Millions)	Health Care		Group Insurance		Large Case Pensions		Corporate Financing			Total Company
Three Months Ended June 30, 2012
Revenue from external customers	$	8,106.2	$	457.7	$	39.8	$	—		$	8,603.7
Operating earnings (loss) (1)	443.5		46.0		3.9		(41.4		)	452.0
Three Months Ended June 30, 2011
Revenue from external customers	$	7,602.6	$	431.2	$	47.9	$	—		$	8,081.7
Operating earnings (loss) (1)	512.9		44.4		6.2		(40.7		)	522.8
Six Months Ended June 30, 2012
Revenue from external customers	$	16,225.7	$	912.3	$	89.2	$	—		$	17,227.2
Operating earnings (loss) (1)	912.4		86.9		9.7		(79.6		)	929.4
Six Months Ended June 30, 2011
Revenue from external customers	$	15,223.2	$	861.5	$	92.5	$	—		$	16,177.2
Operating earnings (loss) (1)	1,068.2		87.3		12.0		(84.5		)	1,083.0

⁽¹⁾  Operating earnings (loss) excludes net realized capital gains or losses and the other items described in the reconciliation on page 25.

Reconciliation of Operating Earnings to Net Income

A reconciliation of operating earningsto net income for the three and six months ended June 30, 2012 and 2011 was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Operating earnings	$	452.0	$	522.8	$	929.4	$	1,083.0
Net realized capital gains, net of tax	5.6		13.9		39.2		39.7
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7

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Segment Information

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Segment Information

13.    Segment Information

Our operations are conducted in three business segments:  Health Care, Group Insurance and Large Case Pensions.  Our Corporate Financing segment is not a business segment; it is added to our business segments to reconcile to our consolidated results.  The Corporate Financing segment includes interest expense on our outstanding debt and the financing components of our pension and OPEB plan expense (the service cost and prior service cost components of this expense are allocated to our business segments).

Summarized financial information of our segments for the three and six months ended June 30, 2012 and 2011 was as follows:

(Millions)	Health Care		Group Insurance		Large Case Pensions		Corporate Financing			Total Company
Three Months Ended June 30, 2012
Revenue from external customers	$	8,106.2	$	457.7	$	39.8	$	—		$	8,603.7
Operating earnings (loss) (1)	443.5		46.0		3.9		(41.4		)	452.0
Three Months Ended June 30, 2011
Revenue from external customers	$	7,602.6	$	431.2	$	47.9	$	—		$	8,081.7
Operating earnings (loss) (1)	512.9		44.4		6.2		(40.7		)	522.8
Six Months Ended June 30, 2012
Revenue from external customers	$	16,225.7	$	912.3	$	89.2	$	—		$	17,227.2
Operating earnings (loss) (1)	912.4		86.9		9.7		(79.6		)	929.4
Six Months Ended June 30, 2011
Revenue from external customers	$	15,223.2	$	861.5	$	92.5	$	—		$	16,177.2
Operating earnings (loss) (1)	1,068.2		87.3		12.0		(84.5		)	1,083.0

⁽¹⁾  Operating earnings (loss) excludes net realized capital gains or losses and the other items described in the reconciliation on page 25.

A reconciliation of operating earningsto net income for the three and six months ended June 30, 2012 and 2011 was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Operating earnings	$	452.0	$	522.8	$	929.4	$	1,083.0
Net realized capital gains, net of tax	5.6		13.9		39.2		39.7
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7

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Discontinued Products (Tables)

6 Months Ended

Jun. 30, 2012

Discontinued Products [Abstract]

Activity in the Reserve for Anticipated Future Losses

The activity in the reserve for anticipated future losses on discontinued products for the six months ended June 30, 2012 and 2011 was as follows (pretax):

(Millions)	2012			2011
Reserve, beginning of period	$	896.3		$	884.8
Operating (losses) income	(6.2		)	1.5
Net realized capital gains	32.6			19.7
Reserve, end of period	$	922.7		$	906.0

Assets and Liabilities Supporting Discontinued Products

Assets and liabilities supporting discontinued products at June 30, 2012 and December 31, 2011 were as

follows: ⁽¹⁾ 

(Millions)	2012		2011
Assets:
Debt and equity securities available for sale	$	2,555.0	$	2,589.7
Mortgage loans	420.4		437.1
Other investments	656.0		619.2
Total investments	3,631.4		3,646.0
Other assets	116.3		130.0
Current and deferred income taxes	22.6		15.7
Receivable from continuing products (2)	539.3		523.2
Total assets	$	4,309.6	$	4,314.9
Liabilities:
Future policy benefits	$	2,933.0	$	3,005.8
Policyholders' funds	7.2		8.2
Reserve for anticipated future losses on discontinued products	922.7		896.3
Other liabilities (3)	446.7		404.6
Total liabilities	$	4,309.6	$	4,314.9

⁽¹⁾  Assets supporting the discontinued products are distinguished from assets supporting continuing products.

⁽²⁾  At the time of discontinuance, a receivable from Large Case Pensions' continuing products was established on the discontinued products balance sheet. This receivable represented the net present value of anticipated cash shortfalls in the discontinued products, which will be funded from continuing products. Interest on the receivable is accrued at the discount rate that was used to calculate the reserve. The offsetting payable, on which interest is similarly accrued, is reflected in continuing products. Interest on the payable generally offsets investment income on the assets available to fund the shortfall. These amounts are eliminated in consolidation.

⁽³⁾  Net unrealized capital gains on the available-for-sale debt securities are included in other liabilities and are not reflected in consolidated shareholders’ equity.

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Discontinued Products

6 Months Ended

Jun. 30, 2012

Discontinued Products [Abstract]

Discontinued Products

15. Discontinued Products

Prior to 1993, we sold single-premium annuities (“SPAs”) and guaranteed investment contracts (“GICs”), primarily to employer sponsored pension plans.  In 1993, we discontinued selling these products to Large Case Pensions customers, and now we refer to these products as discontinued products.

We discontinued selling these products because they were generating losses for us, and we projected that they would continue to generate losses over their life (which is currently greater than 30 years for SPAs and less than 3 years for GICs); so we established a reserve for anticipated future losses at the time of discontinuance.  This reserve represents the present value (at the risk-free rate of return at the time of discontinuance, consistent with the duration of the liabilities) of the difference between the expected cash flows from the assets supporting these products and the cash flows expected to be required to meet the obligations of the outstanding contracts. 

Key assumptions in setting this reserve include future investment results, payments to retirees, mortality and retirement rates and the cost of asset management and customer service.  In 2012, we modified the mortality tables used in order to reflect a more up-to-date 2000 Retired Pensioner’s Mortality table. The mortality tables were previously modified in 1995, in order to reflect a more up-to-date 1994 Uninsured Pensioner's Mortality table. In 1997, we began the use of a bond default assumption to reflect historical default experience.  Other than these changes, since 1993 there have been no significant changes to the assumptions underlying the reserve.

We review the adequacy of this reserve quarterly based on actual experience.  As long as our expectation of future losses remains consistent with prior projections, the results of the discontinued products are applied against the reserve and do not affect net income.  However, if actual or expected future losses are greater than we currently estimate, we may increase the reserve, which could adversely impact net income.  If actual or expected future losses are less than we currently estimate, we may decrease the reserve, which could favorably impact net income.  As a result of this review, the reserve at each of June 30, 2012 and December 31, 2011 reflects management's best estimate of anticipated future losses, and is included in future policy benefits on our balance sheet.

The activity in the reserve for anticipated future losses on discontinued products for the six months ended June 30, 2012 and 2011 was as follows (pretax):

(Millions)	2012			2011
Reserve, beginning of period	$	896.3		$	884.8
Operating (losses) income	(6.2		)	1.5
Net realized capital gains	32.6			19.7
Reserve, end of period	$	922.7		$	906.0

During the six months ended June 30, 2012, our discontinued products reflected net realized capital gains (primarily attributable to gains from the sale of debt securities, partially offset by losses from other investments) and operating losses. We evaluated these results against our expectations of future cash flows assumed in estimating the reserve and concluded that no adjustment to the reserve was required at June 30, 2012.

Assets and liabilities supporting discontinued products at June 30, 2012 and December 31, 2011 were as

follows: ⁽¹⁾ 

(Millions)	2012		2011
Assets:
Debt and equity securities available for sale	$	2,555.0	$	2,589.7
Mortgage loans	420.4		437.1
Other investments	656.0		619.2
Total investments	3,631.4		3,646.0
Other assets	116.3		130.0
Current and deferred income taxes	22.6		15.7
Receivable from continuing products (2)	539.3		523.2
Total assets	$	4,309.6	$	4,314.9
Liabilities:
Future policy benefits	$	2,933.0	$	3,005.8
Policyholders' funds	7.2		8.2
Reserve for anticipated future losses on discontinued products	922.7		896.3
Other liabilities (3)	446.7		404.6
Total liabilities	$	4,309.6	$	4,314.9

⁽¹⁾  Assets supporting the discontinued products are distinguished from assets supporting continuing products.

⁽²⁾  At the time of discontinuance, a receivable from Large Case Pensions' continuing products was established on the discontinued products balance sheet. This receivable represented the net present value of anticipated cash shortfalls in the discontinued products, which will be funded from continuing products. Interest on the receivable is accrued at the discount rate that was used to calculate the reserve. The offsetting payable, on which interest is similarly accrued, is reflected in continuing products. Interest on the payable generally offsets investment income on the assets available to fund the shortfall. These amounts are eliminated in consolidation.

⁽³⁾  Net unrealized capital gains on the available-for-sale debt securities are included in other liabilities and are not reflected in consolidated shareholders’ equity.

The distributions on our discontinued products consisted of scheduled contract maturities, settlements and benefit payments of $100 million and $201 million for the three and six months ended June 30, 2012, respectively, and $105 million and $209 million for the three and six months ended June 30, 2011, respectively. There were no participant-directed withdrawals from our discontinued products during the three or six months ended June 30, 2012 or 2011.  Cash required to fund these distributions was provided by earnings and scheduled payments on, and sales of, invested assets.

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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	2,600,000,000	2,600,000,000
Common stock, shares issued	334,200,000	349,700,000
Common stock, shares outstanding	334,200,000	349,700,000

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Consolidated Statements of Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Administrative services contract member co-payments and plan sponsor reimbursements related to our mail order and specialty pharmacy operation, which are included in fees and other revenue.	$ 20.7	$ 14.4	$ 39.5	$ 30.0
Pharmaceutical and processing costs of our mail order and specialty pharmacy operations related to administrative services contracts.	294.3	311.6	579.8	620.9
Insured member co-payments related to our mail order and specialty pharmacy operations, which are a reduction of health care costs.	$ 31.1	$ 32.5	$ 68.0	$ 69.6

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Pension and Other Postretirement Plans

6 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Plans

8.    Pension and Other Postretirement Plans

Defined Benefit Retirement Plans

Components of the net periodic benefit (income) cost of our tax-qualified noncontributory defined benefit pension plans and other postretirement benefit (“OPEB”) plans for the three and six months ended June 30, 2012 and 2011 were as follows:

	Pension Plans												OPEB Plans
	Three Months Ended						Six Months Ended						Three Months Ended						Six Months Ended
	June 30,						June 30,						June 30,						June 30,
(Millions)	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	—		$	—		$	—		$	—		$	.1		$	—		$	.1		$	.1
Amortization of prior service cost	(.1		)	(.1		)	(.2		)	(.2		)	(.9		)	(.8		)	(1.8		)	(1.8		)
Interest cost	74.6			78.1			149.2			156.2			3.6			4.1			7.2			8.3
Expected return on plan assets	(96.9		)	(95.9		)	(193.7		)	(191.9		)	(.8		)	(.9		)	(1.4		)	(1.8		)
Recognized net actuarial losses	17.7			14.6			35.2			29.2			1.1			1.2			2.2			2.4
Net periodic benefit (income) cost	$	(4.7	)	$	(3.3	)	$	(9.5	)	$	(6.7	)	$	3.1		$	3.6		$	6.3		$	7.2

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Document and Entity Information Document (USD $)	6 Months Ended
	Jun. 30, 2012
Entity Information [Line Items]
Entity Registrant Name	AETNA INC /PA/
Entity Central Index Key	0001122304
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding	334,200,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 13,000,000,000

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Debt

6 Months Ended

Jun. 30, 2012

Debt Disclosure [Abstract]

Debt

9.    Debt

The carrying value of our long-term debt at June 30, 2012 and December 31, 2011 was as follows:

(Millions)	June 30, 2012		December 31, 2011
Senior notes, 6.0%, due 2016	$	748.3	$	748.0
Senior notes, 1.75%, due 2017	248.4		—
Senior notes, 6.5%, due 2018	499.1		499.1
Senior notes, 3.95%, due 2020	743.0		742.6
Senior notes, 4.125%, due 2021	493.8		493.4
Senior notes, 6.625%, due 2036	798.7		798.7
Senior notes, 6.75%, due 2037	696.0		695.9
Senior notes, 4.5%, due 2042	479.0		—
Total long-term debt	$	4,706.3	$	3,977.7

In June 2012, we entered into an interest rate swap with a notional value of $200 million. We designated this swap as a cash flow hedge against interest rate exposure related to the forecasted future issuance of fixed-rate debt. At June 30, 2012, the interest rate swap had a pretax fair value gain of approximately $2 million, which was reflected net of tax in accumulated other comprehensive loss within shareholders' equity.

In May 2012, we issued $250 million of 1.75% senior notes due 2017 and $500 million of 4.5% senior notes due 2042 (collectively, the "2012 senior notes"). In 2011, prior to issuing the 2012 senior notes, we entered into two interest rate swaps with an aggregate notional value of $250 million and designated these swaps as cash flow hedges against interest rate exposure related to the forecasted future issuance of fixed-rate debt. We terminated the swaps prior to issuing the 2012 senior notes and paid an aggregate of $7.5 million to the swap counterparties upon termination of the swaps. The related $7.5 million pretax loss is recorded in accumulated other comprehensive loss and is being amortized as an increase to interest expense over the first twenty semi-annual interest payments associated with the $500 million of 4.5% senior notes due 2042.

At June 30, 2012, we had no commercial paper outstanding. At December 31, 2011, we had approximately $426 million of commercial paper outstanding with a weighted average interest rate of .38%.

On March 27, 2012 we entered into an unsecured $1.5 billion five-year revolving credit agreement (the “Facility”) with several financial institutions. The Facility replaced our prior $1.5 billion five-year revolving credit agreement which was due to expire on March 27, 2013. The Facility provides for the issuance of up to $200 million of letters of credit at our request, which count as usage of the available commitments under the Facility.  Upon our agreement with one or more financial institutions, we may expand the aggregate commitments under the Facility to a maximum of $2.0 billion. Various interest rate options are available under the Facility.  Any revolving borrowings mature on the termination date of the Facility.  We pay facility fees on the Facility ranging from .070% to .150% per annum, depending upon our long-term senior unsecured debt rating.  The facility fee was .100% at June 30, 2012.  The Facility contains a financial covenant that requires us to maintain a ratio of total debt to consolidated capitalization as of the end of each fiscal quarter at or below .5 to 1.0.  For this purpose, consolidated capitalization equals the sum of total shareholders’ equity, excluding any overfunded or underfunded status of our pension and OPEB plans and any net unrealized capital gains and losses, and total debt (as defined in the Facility).  We met this requirement at June 30, 2012.  There were no amounts outstanding under the Facility or the replaced five-year revolving credit agreement at any time during the six months ended June 30, 2012.

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Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Net income	$ 457.6		$ 536.7		$ 968.6		$ 1,122.7
Other comprehensive (loss) income	92.8		93.7		134.3		69.1
Comprehensive Income	550.4		630.4		1,102.9		1,191.8
Net Unrealized Gains (Losses) Previously Impaired Securities [Member]
Net unrealized gains (losses)	5.7	[1]	2.4	[1]	2.6	[1]	2.1	[1]
Less: Net unrealized gains on securities, reclassification of gains to earnings	6.6	[1]	5.6	[1]	3.3	[1]	14.4	[1]
Other comprehensive (loss) income	(0.9)	[1]	(3.2)	[1]	(0.7)	[1]	(12.3)	[1]
Other Securities [Member]
Net unrealized gains (losses)	96.6		116.9		155.7		102.7
Less: Net unrealized gains on securities, reclassification of gains to earnings	10.5		25.0		44.8		38.2
Other comprehensive (loss) income	86.1		91.9		110.9		64.5
Foreign Currency Gain (Loss) [Member]
Net unrealized gains losses	(4.7)		(5.4)		(0.4)		(3.7)
Less: Foreign currency and derivatives reclassification of losses to earnings	(0.8)		(0.8)		(1.5)		(1.4)
Other comprehensive (loss) income	(3.9)		(4.6)		1.1		(2.3)
Pension and OPEB Plan [Member]
Amortization of net actuarial losses	12.1		10.2		24.3		20.5
Amortization of prior service cost	$ (0.6)		$ (0.6)		$ (1.3)		$ (1.3)

[1] Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

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Earnings Per Common Share

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Earnings Per Common Share

3. Earnings Per Common Share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during the reporting period.  Diluted EPS is computed in a similar manner, except that the weighted average number of common shares outstanding is adjusted for the dilutive effects of our outstanding stock-based compensation awards, but only if the effect is dilutive.

The computations of basic and diluted EPS for the three and six months ended June 30, 2012 and 2011 are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions, except per common share data)	2012		2011		2012		2011
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7
Weighted average shares used to compute basic EPS	341.7		379.2		346.0		381.3
Dilutive effect of outstanding stock-based compensation awards (1)	4.5		8.1		5.5		7.9
Weighted average shares used to compute diluted EPS	346.2		387.3		351.5		389.2
Basic EPS	$	1.34	$	1.42	$	2.80	$	2.94
Diluted EPS	$	1.32	$	1.39	$	2.76	$	2.88

⁽¹⁾  Stock-based compensation awards are not included in the calculation of diluted EPS if the exercise price is greater than the average market price of Aetna common shares during the period (i.e., the awards are anti-dilutive).  Approximately 7.5 million and 7.4 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2012, respectively, and 12.6 million and 12.8 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2011, respectively, because they were anti-dilutive.

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2012

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Interim Financial Statements

These interim financial statements necessarily rely on estimates, including assumptions as to annualized tax rates.  In the opinion of management, all adjustments necessary for a fair statement of results for the interim periods have been made.  All such adjustments are of a normal, recurring nature.  The accompanying unaudited consolidated financial statements and related notes should be read in conjunction with the consolidated financial statements and related notes presented in our 2011 Annual Report on Form 10-K (our “2011 Annual Report”).  Certain financial information that is normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), but that is not required for interim reporting purposes, has been condensed or omitted.  We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2011 Annual Report, unless the information contained in those disclosures materially changed and is required by GAAP.  We evaluated subsequent events that occurred after June 30, 2012 through the date the financials were issued and determined there were no other items to disclose.    

Principles of Consolidation

These unaudited consolidated financial statements have been prepared in accordance with GAAP and include the accounts of Aetna and the subsidiaries that we control.  All significant intercompany balances have been eliminated in consolidation.

New Accounting Standards

Testing Goodwill for Impairment

Effective January 1, 2012, we adopted new accounting guidance for testing goodwill for impairment. Under this guidance, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of our Health Care or Group Insurance segment is less than its carrying value. If we determine that the fair value is likely greater than its carrying value, then no additional analysis is necessary, as the goodwill is not impaired. The adoption of this new guidance did not have an impact on our financial position or operating results.

Presentations of Comprehensive Income

Effective January 1, 2012, we adopted new presentation requirements for other comprehensive income in financial statements.  Under this new guidance, we have presented comprehensive income as a separate statement immediately following the statement of income.  This change in presentation did not have an impact on our financial position or operating results.

Fair Value Measurements

Effective January 1, 2012, we adopted new guidance relating to fair value measurements.  This new guidance amended and clarified certain existing fair value measurement principles and required additional disclosures for all Level 3 assets, including a qualitative discussion about the sensitivity of Level 3 fair value measurements.  The new requirements did not have an impact on our financial position or operating results.

Reconsideration of Effective Control for Repurchase Agreements

Effective January 1, 2012, we adopted new guidance relating to repurchase agreements and other agreements that entitle and obligate a transferor to repurchase or redeem financial assets before maturity.  The guidance prescribes when an entity may recognize a sale upon the transfer of financial assets subject to repurchase agreements.  Since we treat these transactions as collateralized borrowings rather than sales, the adoption of this accounting guidance did not have an impact on our financial position or operating results.

Deferred Acquisition Costs

Effective January 1, 2012, we prospectively adopted new guidance for costs associated with acquiring or renewing insurance contracts. This guidance clarified that such costs qualify for capitalization when directly related to the successful acquisition of new and renewed insurance contracts. We capitalized an immaterial amount of acquisition costs in 2011, all of which related to acquisition costs incurred subsequent to the acquisition of the Medicare Supplement business and related blocks of in-force business from Genworth in the fourth quarter of 2011. As a result, the amount of costs that would have been capitalized in 2011 if this new guidance were applied is immaterial.

Future Application of Accounting Standards

Fees Paid to the Federal Government by Health Insurers

Effective January 1, 2014, we will adopt new accounting guidance relating to the recognition and income statement reporting of any mandated fees to be paid to the federal government by health insurers. This guidance will apply primarily to new fees enacted in the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, "Health Care Reform"). The mandated fees may be material, and this new accounting guidance will result in the recognition of this expense on a straight-line basis beginning in 2014.

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Reinsurance

6 Months Ended

Jun. 30, 2012

Reinsurance Disclosures [Abstract]

Reinsurance

14.     Reinsurance

In January 2012, we entered into three-year reinsurance agreements with an unrelated insurer. The agreements allow us to reduce our required statutory capital and provide an aggregate of $150 million of collateralized excess of loss reinsurance coverage on a portion of Aetna's group Commercial Insured Health Care business.

Effective January 1, 2012, we renewed our agreement with another unrelated insurer to reinsure fifty percent of our group term life and group accidental death and dismemberment insurance policies. We entered into this contract in order to reduce the risk on catastrophic loss which in turn reduces our statutory capital and surplus requirements. This contract does not qualify for reinsurance accounting under GAAP. As such, this contract has been accounted for under deposit accounting.

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Capital Stock

6 Months Ended

Jun. 30, 2012

Class of Stock Disclosures [Abstract]

Capital Stock

10.    Capital Stock

On February 24, 2012 and September 23, 2011, our Board of Directors (our "Board") authorized two separate share repurchase programs. Each repurchase program authorized us to repurchase up to $750 million of our common stock.  During the six months ended June 30, 2012, we repurchased approximately 21 million shares of common stock at a cost of approximately $925 million.  At June 30, 2012, we had remaining authorization to repurchase an aggregate of up to approximately $248 million of common stock under the February 24, 2012 program.

During the six months ended June 30, 2012 our Board declared the following cash dividends:

Date Declared	Dividend Amount Per Share			Stockholders of Record Date	Date Paid/ To be Paid	Total Dividends (Millions)
February 24, 2012		$	.175	April 12, 2012	April 27, 2012		$	60.8
May 18, 2012		.175		July 12, 2012	July 27, 2012		59.2

Declaration and payment of future dividends is at the discretion of our Board and may be adjusted as business needs or market conditions change.

On February 2, 2012, approximately .5 million performance stock units (“PSUs”), 1.1 million market stock units (“MSUs”) and 1.1 million restricted stock units (“RSUs”) were granted to certain employees.  The number of vested PSUs (which could range from zero to 200% of the original number of units granted) is dependent upon the degree to which we achieve performance goals during the performance periods as determined by our Board’s Committee on Compensation and Organization.  The PSUs have two separate performance periods which relate to the Company's operating performance during the years ended December 31, 2012 and December 31, 2013. The vesting period for the PSUs ends on February 2, 2014.   The number of vested MSUs (which could range from zero to 150% of the original number of units granted) is based on the percentage change between the closing price of our common stock on the grant date and the weighted average closing price of our common stock for the thirty trading days prior to and including the vesting dates.  The MSUs have two separate vesting periods of approximately two and three years, respectively.  Each vested PSU, MSU and RSU represents one share of common stock and will be paid in shares of common stock, net of taxes, at the end of the applicable vesting period.  The RSUs will become 100% vested approximately three years from the grant date, with one-third vesting each December.

On February 8, 2012, the MSUs which were granted on February 8, 2010 became fully vested at approximately 150% of the original number of units granted.

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Other Comprehensive (Loss) Income

6 Months Ended

Jun. 30, 2012

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other Comprehensive (Loss) Income

6.    Other Comprehensive (Loss) Income

Shareholders’ equity included the following activity in accumulated other comprehensive loss (excluding amounts related to experience-rated contract holders and discontinued products) for the six months ended June 30, 2012 and 2011:

	Net Unrealized Gains (Losses)									Pension and OPEB Plans							Total Accumulated Other Comprehensive (Loss) Income
	Securities					Foreign Currency and Derivatives
(Millions)	Previously Impaired (1)			All Other					Unrecognized Net Actuarial Losses				Unrecognized Prior Service Cost
Six months ended June 30, 2012
Balance at December 31, 2011	$	58.2		$	595.2	$	(33.7	)		$	(1,834.6	)		$	25.7		$	(1,189.2	)
Other comprehensive (loss) income	(.7		)	110.9		1.1				24.3				(1.3		)	134.3
Balance at June 30, 2012	$	57.5		$	706.1	$	(32.6	)		$	(1,810.3	)		$	24.4		$	(1,054.9	)
Six months ended June 30, 2011
Balance at December 31, 2010	$	75.1		$	375.2	$	(27.3	)		$	(1,614.0	)		$	28.4		$	(1,162.6	)
Other comprehensive (loss) income	(12.3		)	64.5		(2.3		)		20.5				(1.3		)	69.1
Balance at June 30, 2011	$	62.8		$	439.7	$	(29.6	)		$	(1,593.5	)		$	27.1		$	(1,093.5	)

⁽¹⁾  Represents unrealized losses on the non-credit related component of impaired debt securities that we do not intend to sell and subsequent changes in the fair value of any previously impaired security.

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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue from external customers	$ 8,603.7		$ 8,081.7		$ 17,227.2		$ 16,177.2
Operating Earnings	452.0	[1]	522.8	[1]	929.4	[1]	1,083.0	[1]
Health Care [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue from external customers	8,106.2		7,602.6		16,225.7		15,223.2
Operating Earnings	443.5	[1]	512.9	[1]	912.4	[1]	1,068.2	[1]
Group Insurance [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue from external customers	457.7		431.2		912.3		861.5
Operating Earnings	46.0	[1]	44.4	[1]	86.9	[1]	87.3	[1]
Large Case Pension [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue from external customers	39.8		47.9		89.2		92.5
Operating Earnings	3.9	[1]	6.2	[1]	9.7	[1]	12.0	[1]
Corporate Financing [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
Revenue from external customers	0		0		0		0
Operating Earnings	$ (41.4)	[1]	$ (40.7)	[1]	$ (79.6)	[1]	$ (84.5)	[1]

[1] Operating earnings (loss) excludes net realized capital gains or losses and the other items described in the reconciliation on page 25.

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Operating Expenses

6 Months Ended

Jun. 30, 2012

Operating Expenses [Abstract]

Operating Expenses

4.     Operating Expenses

For the three and six months ended June 30, 2012 and 2011, selling expenses (which include broker commissions, the variable component of our internal sales force compensation and premium taxes) and general and administrative expenses were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Selling expenses	$	271.4	$	267.2	$	547.7	$	557.9
General and administrative expenses:
Salaries and related benefits	754.2		786.8		1,556.3		1,550.6
Other general and administrative expenses	620.8		537.7		1,208.4		1,046.7
Total general and administrative expenses	1,375.0		1,324.5		2,764.7		2,597.3
Total operating expenses	$	1,646.4	$	1,591.7	$	3,312.4	$	3,155.2

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Investments

6 Months Ended

Jun. 30, 2012

Investments [Abstract]

Investment [Text Block]

5.     Investments

Total investments at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012						December 31, 2011
(Millions)	Current		Long-term		Total		Current		Long-term		Total
Debt and equity securities available for sale	$	2,217.3	$	15,469.4	$	17,686.7	$	2,168.1	$	15,222.7	$	17,390.8
Mortgage loans	125.6		1,498.3		1,623.9		41.7		1,606.8		1,648.5
Other investments	4.1		1,363.3		1,367.4		2.0		1,253.7		1,255.7
Total investments	$	2,347.0	$	18,331.0	$	20,678.0	$	2,211.8	$	18,083.2	$	20,295.0

Debt and Equity Securities

Debt and equity securities available for sale at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses				Fair Value
June 30, 2012
Debt securities:
U.S. government securities	$	1,542.1	$	168.8	$	(.6	)		$	1,710.3
States, municipalities and political subdivisions	2,662.6		242.5		(2.2		)		2,902.9
U.S. corporate securities	6,269.8		764.3		(6.2		)		7,027.9
Foreign securities	2,695.7		312.3		(21.0		)		2,987.0
Residential mortgage-backed securities	945.3		53.7		(.1		)		998.9
Commercial mortgage-backed securities	1,259.3		121.7		(3.3		)	(1)	1,377.7
Other asset-backed securities	480.8		25.0		(3.3		)	(1)	502.5
Redeemable preferred securities	125.8		10.8		(8.8		)		127.8
Total debt securities	15,981.4		1,699.1		(45.5		)		17,635.0
Equity securities	47.3		10.4		(6.0		)		51.7
Total debt and equity securities (2)	$	16,028.7	$	1,709.5	$	(51.5	)		$	17,686.7
December 31, 2011
Debt securities:
U.S. government securities	$	1,394.7	$	165.0	$	(.4	)		$	1,559.3
States, municipalities and political subdivisions	2,654.9		208.5		(3.3		)		2,860.1
U.S. corporate securities	6,484.0		718.2		(28.1		)		7,174.1
Foreign securities	2,614.9		278.2		(38.0		)		2,855.1
Residential mortgage-backed securities	849.8		51.1		(.1		)		900.8
Commercial mortgage-backed securities	1,295.3		98.3		(5.8		)	(1)	1,387.8
Other asset-backed securities	437.0		20.6		(3.8		)	(1)	453.8
Redeemable preferred securities	164.2		12.6		(14.5		)		162.3
Total debt securities	15,894.8		1,552.5		(94.0		)		17,353.3
Equity securities	40.3		5.0		(7.8		)		37.5
Total debt and equity securities (2)	$	15,935.1	$	1,557.5	$	(101.8	)		$	17,390.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, we held securities for which we previously recognized $25.2 million and $27.6 million, respectively, of non-credit related impairments in accumulated other comprehensive loss. These securities had a net unrealized capital gain at June 30, 2012 and December 31, 2011 of $7.7 million and $7.4 million, respectively.

⁽²⁾  Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products).  At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products.  Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

The fair value of debt securities at June 30, 2012 is shown below by contractual maturity.  Actual maturities may differ from contractual maturities because securities may be restructured, called or prepaid.

(Millions)	Fair Value
Due to mature:
Less than one year	$	871.7
One year through five years	3,641.4
After five years through ten years	5,065.9
Greater than ten years	5,176.9
Residential mortgage-backed securities	998.9
Commercial mortgage-backed securities	1,377.7
Other asset-backed securities	502.5
Total	$	17,635.0

Mortgage-Backed and Other Asset-Backed Securities

All of our residential mortgage-backed securities at June 30, 2012 were issued by the Government National Mortgage Association, the Federal National Mortgage Association or the Federal Home Loan Mortgage Corporation and carry agency guarantees and explicit or implicit guarantees by the U.S. Government.  At June 30, 2012, our residential mortgage-backed securities had an average quality rating of AAA and a weighted average duration of 1.7 years.

Our commercial mortgage-backed securities have underlying loans that are dispersed throughout the U.S.  Significant market observable inputs used to value these securities include probability of default and loss severity.  At June 30, 2012, these securities had an average quality rating of AA+ and a weighted average duration of 3.4 years.

Our other asset-backed securities have a variety of underlying collateral (e.g., automobile loans, credit card receivables and home equity loans).  Significant market observable inputs used to value these securities include the unemployment rate, loss severity and probability of default.  At June 30, 2012, these securities had an average quality rating of AA+ and a weighted average duration of 3.4 years.

Unrealized Capital Losses and Net Realized Capital Gains (Losses)

When a debt or equity security is in an unrealized capital loss position, we monitor the duration and severity of the loss to determine if sufficient market recovery can occur within a reasonable period of time.  We recognize an other-than-temporary impairment (“OTTI”) when we intend to sell a debt security that is in an unrealized capital loss position or if we determine a credit-related loss on a debt or equity security has occurred.

Summarized below are the debt and equity securities we held at June 30, 2012 and December 31, 2011 that were in an unrealized capital loss position, aggregated by the length of time the investments have been in that position:

	Less than 12 months				Greater than 12 months				Total (1)
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2012
Debt securities:
U.S. government securities	$	58.3	$	.2	$	15.1	$	.4	$	73.4	$	.6
States, municipalities and political subdivisions	119.9		.7		43.4		1.5		163.3		2.2
U.S. corporate securities	296.8		4.4		30.4		1.8		327.2		6.2
Foreign securities	213.5		10.2		61.2		10.8		274.7		21.0
Residential mortgage-backed securities	5.3		—		2.4		.1		7.7		.1
Commercial mortgage-backed securities	14.8		.3		57.6		3.0		72.4		3.3
Other asset-backed securities	12.1		.1		1.6		3.2		13.7		3.3
Redeemable preferred securities	4.0		—		24.5		8.8		28.5		8.8
Total debt securities	724.7		15.9		236.2		29.6		960.9		45.5
Equity securities	11.7		.6		22.8		5.4		34.5		6.0
Total debt and equity securities (1)	$	736.4	$	16.5	$	259.0	$	35.0	$	995.4	$	51.5
December 31, 2011
Debt securities:
U.S. government securities	$	14.0	$	—	$	15.1	$	.4	$	29.1	$	.4
States, municipalities and political subdivisions	23.8		.4		68.6		2.9		92.4		3.3
U.S. corporate securities	625.5		25.7		62.4		2.4		687.9		28.1
Foreign securities	498.8		25.4		55.3		12.6		554.1		38.0
Residential mortgage-backed securities	.9		—		2.9		.1		3.8		.1
Commercial mortgage-backed securities	102.7		2.8		42.8		3.0		145.5		5.8
Other asset-backed securities	27.8		.1		3.9		3.7		31.7		3.8
Redeemable preferred securities	17.6		.9		34.5		13.6		52.1		14.5
Total debt securities	1,311.1		55.3		285.5		38.7		1,596.6		94.0
Equity securities	6.2		2.4		20.8		5.4		27.0		7.8
Total debt and equity securities (1)	$	1,317.3	$	57.7	$	306.3	$	44.1	$	1,623.6	$	101.8

⁽¹⁾  At June 30, 2012 and December 31, 2011, debt and equity securities in an unrealized capital loss position of $30.5 million and $48.2 million, respectively, and with related fair value of $296.6 million and $446.1 million, respectively, related to experience-rated and discontinued products.

We reviewed the securities in the tables above and concluded that these are performing assets generating investment income to support the needs of our business.  In performing this review, we considered factors such as the quality of the investment security based on research performed by our internal credit analysts and external rating agencies and the prospects of realizing the carrying value of the security based on the investment’s current prospects for recovery.  At June 30, 2012, we did not have the intention to sell the debt securities that were in an unrealized capital loss position.

The maturity dates for debt securities in an unrealized capital loss position at June 30, 2012 were as follows:

	Supporting discontinued and experience-rated products				Supporting remaining products				Total
(Millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Due to mature:
Less than one year	$	—	$	—	$	13.1	$	.1	$	13.1	$	.1
One year through five years	22.0		.2		197.8		2.6		219.8		2.8
After five years through ten years	66.2		1.2		212.9		4.1		279.1		5.3
Greater than ten years	160.6		22.8		194.5		7.8		355.1		30.6
Residential mortgage-backed securities	—		—		7.7		.1		7.7		.1
Commercial mortgage-backed securities	13.0		.5		59.4		2.8		72.4		3.3
Other asset-backed securities	.6		—		13.1		3.3		13.7		3.3
Total	$	262.4	$	24.7	$	698.5	$	20.8	$	960.9	$	45.5

Net realized capital gains for the three and six months ended June 30, 2012 and 2011, excluding amounts related to experience-rated contract holders and discontinued products, were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
OTTI losses on debt securities	$	(2.0	)	$	(1.7	)	$	(8.6	)	$	(4.5	)
Portion of OTTI losses on debt securities recognized   in other comprehensive income	.1			—			.1			—
Net OTTI losses on debt securities recognized in earnings	(1.9		)	(1.7		)	(8.5		)	(4.5		)
Net realized capital gains, excluding OTTI losses on debt securities	10.5			23.1			68.8			65.6
Net realized capital gains	$	8.6		$	21.4		$	60.3		$	61.1

The net realized capital gains for the three and six months ended June 30, 2012 and 2011 were primarily attributable to the sale of debt securities, partially offset by losses from derivative transactions.

Excluding amounts related to experience-rated and discontinued products, proceeds from the sale of debt securities and the related gross realized capital gains and losses for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
Proceeds on sales	$	1,075.5	$	1,577.5	$	2,815.3	$	3,091.9
Gross realized capital gains	41.0		55.4		104.9		109.2
Gross realized capital losses	5.4		6.3		11.3		25.1

Mortgage Loans

Our mortgage loans are collateralized by commercial real estate.  During the three and six months ended June 30, 2012 and 2011 we had the following activity in our mortgage loan portfolio:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions)	2012		2011		2012		2011
New mortgage loans	$	22.6	$	52.8	$	60.5	$	128.5
Mortgage loans fully repaid	10.8		4.7		37.3		39.2
Mortgage loans foreclosed	16.7		—		16.7		—

At June 30, 2012 and December 31, 2011, we had no material problem, restructured or potential problem mortgage loans.  We also had no material impairment reserves on these loans at June 30, 2012 or December 31, 2011.

We assess our mortgage loans on a regular basis for credit impairments, and annually assign a credit quality indicator to each loan.  Our credit quality indicator is internally developed and categorizes our portfolio on a scale from 1 to 7.  Category 1 represents loans of superior quality, and Categories 6 and 7 represent loans where collections are at risk.  The vast majority of our mortgage loans fall into the Level 2 to 4 ratings.  These ratings represent loans where credit risk is minimal to acceptable; however, these loans may display some susceptibility to economic changes.  Category 5 represents loans where credit risk is not substantial but these loans warrant management’s close attention.  These indicators are based upon several factors, including current loan to value ratios, property condition, market trends, borrower quality and deal structure.  Based upon our most recent assessments at June 30, 2012 and December 31, 2011, our mortgage loans were given the following credit quality indicators:

(In Millions, except credit ratings indicator)	June 30, 2012		December 31, 2011
1	$	111.4	$	95.6
2 to 4	1,435.3		1,426.1
5	50.6		97.1
6 and 7	26.6		29.7
Total	$	1,623.9	$	1,648.5

Variable Interest Entities

In determining whether to consolidate a variable interest entity ("VIE"), we consider several factors including whether we have the power to direct activities, the obligation to absorb losses and the right to receive benefits that could potentially be significant to the VIE.  We have relationships with certain real estate partnerships and one hedge fund partnership that are considered VIEs, but are not consolidated.  We record the amount of our investment in these partnerships as long-term investments on our balance sheets and recognize our share of partnership income or losses in earnings.  Our maximum exposure to loss as a result of our investment in these partnerships is our investment balance at June 30, 2012 and December 31, 2011 of approximately $193 million and $175 million, respectively, and the risk of recapture of tax credits related to the real estate partnerships previously recognized, which we do not consider significant.  We do not have a future obligation to fund losses or debts on behalf of these investments; however, we may voluntarily contribute funds.  The real estate partnerships construct, own and manage low-income housing developments and had total assets of approximately $5.6 billion and $5.1 billion at June 30, 2012 and December 31, 2011, respectively.  The hedge fund partnership had total assets of approximately $6.8 billion and $5.9 billion at June 30, 2012 and December 31, 2011, respectively.

Non-controlling (Minority) Interests

At June 30, 2012 and December 31, 2011, non-controlling interests were approximately $67 million and $71 million, respectively, primarily related to third party interests in our investment holdings.  The non-controlling entities’ share of these interests was included in accrued expenses and other current liabilities.  Net income attributable to these interests was approximately $.5 million and $1.5 million for the three and six months ended June 30, 2012, respectively, and $.8 million and $3.0 million for the three and six months ended June 30, 2011, respectively.  These non-controlling interests did not have a material impact on our financial position or operating results.

Net Investment Income

Sources of net investment income for the three and six months ended June 30, 2012 and 2011 were as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Millions)	2012			2011			2012			2011
Debt securities	$	191.8		$	212.1		$	388.7		$	423.4
Mortgage loans	26.9			24.6			65.5			49.3
Other investments	11.7			11.8			24.1			35.9
Gross investment income	230.4			248.5			478.3			508.6
Less: investment expenses	(7.6		)	(7.2		)	(14.9		)	(14.7		)
Net investment income (1)	$	222.8		$	241.3		$	463.4		$	493.9

⁽¹⁾  Net investment income includes $77.1 million and $157.8 million for the three and six months ended June 30, 2012, respectively, and $80.4 million and $167.0 million for the three and six months ended June 30, 2011, respectively, related to investments supporting our experience-rated and discontinued products.

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Financial Instruments

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Financial Instruments

7.    Financial Instruments

The preparation of our consolidated financial statements in accordance with GAAP requires certain of our assets and liabilities to be reflected at their fair value, and others on another basis, such as an adjusted historical cost basis.  In this note, we provide details on the fair value of financial assets and liabilities and how we determine those fair values.  We present this information for those financial instruments that are measured at fair value for which the change in fair value impacts net income or other comprehensive income separately from other financial assets and liabilities.

Financial Instruments Measured at Fair Value in our Balance Sheets

Certain of our financial instruments are measured at fair value in our balance sheets.  The fair values of these instruments are based on valuations that include inputs that can be classified within one of three levels of a hierarchy established by GAAP.  The following are the levels of the hierarchy and a brief description of the type of valuation information (“inputs”) that qualifies a financial asset or liability for each level:

◦ Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets.

◦ Level 2 – Inputs other than Level 1 that are based on observable market data.  These include: quoted prices for similar assets in active markets, quoted prices for identical assets in inactive markets, inputs that are observable that are not prices (such as interest rates and credit risks) and inputs that are derived from or corroborated by observable markets.

◦ Level 3 – Developed from unobservable data, reflecting our own assumptions.

Financial assets and liabilities are classified based upon the lowest level of input that is significant to the valuation.  When quoted prices in active markets for identical assets and liabilities are available, we use these quoted market prices to determine the fair value of financial assets and liabilities and classify these assets and liabilities as Level 1.  In other cases where a quoted market price for identical assets and liabilities in an active market is either not available or not observable, we estimate fair value using valuation methodologies based on available and observable market information or by using a matrix pricing model.  These financial assets and liabilities would then be classified as Level 2.  If quoted market prices are not available, we determine fair value using broker quotes or an internal analysis of each investment’s financial performance and cash flow projections.  Thus, financial assets and liabilities may be classified in Level 3 even though there may be some significant inputs that may be observable.

The following is a description of the valuation methodologies used for our financial assets and liabilities that are measured at fair value, including the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Debt Securities – Where quoted prices are available in an active market, our debt securities are classified in Level 1 of the fair value hierarchy.  Our Level 1 debt securities are comprised primarily of U.S. Treasury securities.  If Level 1 valuations are not available, the fair value is determined using models such as matrix pricing, which use quoted market prices of debt securities with similar characteristics, or discounted cash flows to estimate fair value.  We obtained one price for each of our Level 2 debt securities and did not adjust any of these prices at June 30, 2012 or December 31, 2011.

We also value certain debt securities using Level 3 inputs.  For Level 3 debt securities, fair values are determined by outside brokers or, in the case of certain private placement securities, are priced internally.  Outside brokers determine the value of these debt securities through a combination of their knowledge of the current pricing environment and market flows.  We obtained one non-binding broker quote for each of these Level 3 debt securities and did not adjust any of these quotes at June 30, 2012 or December 31, 2011.  The total fair value of our broker quoted securities was approximately $127 million at June 30, 2012 and $107 million at December 31, 2011.  Examples of these Level 3 debt securities include certain U.S. and foreign corporate securities and certain of our commercial mortgage-backed securities as well as other asset-backed securities.  For some of our private placement securities, our internal staff determines the value of these debt securities by analyzing spreads of corporate and sector indices as well as interest spreads of comparable public bonds.  Examples of these Level 3 debt securities include certain U.S. and foreign securities and certain tax-exempt municipal securities.

Equity Securities – We currently have two classifications of equity securities:  those that are publicly traded and those that are privately held.  Our publicly-traded securities are classified as Level 1 because quoted prices are available for these securities in an active market.  For privately-held equity securities, there is no active market; therefore, we classify these securities as Level 3 because we price these securities through an internal analysis of each investment’s financial statements and cash flow projections. Significant unobservable inputs consist of earnings and revenue multiples, discount for lack of marketability and comparability adjustments. An increase or decrease in any of these unobservable inputs would result in a change in the fair value measurement, which may be significant.

Derivatives – Where quoted prices are available in an active market, our derivatives are classified in Level 1 of the fair value hierarchy.  Certain of our derivative instruments are valued using models that primarily use market observable inputs and therefore are classified as Level 2 because they are traded in markets where quoted market prices are not readily available.

Financial assets and liabilities measured at fair value on a recurring basis in our balance sheets at June 30, 2012 and December 31, 2011 were as follows:

(Millions)	Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Debt securities:
U.S. government securities	$	1,427.5	$	282.8	$	—	$	1,710.3
States, municipalities and political subdivisions	—		2,901.3		1.6		2,902.9
U.S. corporate securities	—		6,968.9		59.0		7,027.9
Foreign securities	—		2,925.6		61.4		2,987.0
Residential mortgage-backed securities	—		998.9		—		998.9
Commercial mortgage-backed securities	—		1,351.7		26.0		1,377.7
Other asset-backed securities	—		471.3		31.2		502.5
Redeemable preferred securities	—		112.1		15.7		127.8
Total debt securities	1,427.5		16,012.6		194.9		17,635.0
Equity securities	18.4		—		33.3		51.7
Derivatives	2.2		1.9		—		4.1
Total	$	1,448.1	$	16,014.5	$	228.2	$	17,690.8
Liabilities:
Derivatives	$	—	$	.5	$	—	$	.5
December 31, 2011
Assets:
Debt securities:
U.S. government securities	$	1,307.0	$	252.3	$	—	$	1,559.3
States, municipalities and political subdivisions	—		2,858.4		1.7		2,860.1
U.S. corporate securities	—		7,122.5		51.6		7,174.1
Foreign securities	—		2,805.7		49.4		2,855.1
Residential mortgage-backed securities	—		900.8		—		900.8
Commercial mortgage-backed securities	—		1,358.3		29.5		1,387.8
Other asset-backed securities	—		419.4		34.4		453.8
Redeemable preferred securities	—		146.6		15.7		162.3
Total debt securities	1,307.0		15,864.0		182.3		17,353.3
Equity securities	.8		—		36.7		37.5
Derivatives	—		2.0		—		2.0
Total	$	1,307.8	$	15,866.0	$	219.0	$	17,392.8
Liabilities:
Derivatives	$	—	$	.1	$	—	$	.1

There were no transfers between Levels 1 and 2 during the three or six months ended June 30, 2012 or 2011. Gross transfers out of Level 3 were $22.7 million during the three and six months ended June 30, 2012, and gross transfers into Level 3 were $1.8 million during the three and six months ended June 30, 2012. Gross transfers out of Level 3 primarily relate to equity securities that have been valued using quoted prices in an active market. There were no material transfers into or out of Level 3 during the three or six months ended June 30, 2011.

Financial Instruments Not Measured at Fair Value in our Balance Sheets

The following is a description of the valuation methodologies used for estimating the fair value of our financial assets and liabilities that are carried on our balance sheets at adjusted cost or contract value.

Mortgage loans: Fair values are estimated by discounting expected mortgage loan cash flows at market rates that reflect the rates at which similar loans would be made to similar borrowers.  These rates reflect our assessment of the credit quality and the remaining duration of the loans.  The fair value estimates of mortgage loans of lower credit quality, including problem and restructured loans, are based on the estimated fair value of the underlying collateral.

Investment contract liabilities:

•With a fixed maturity:  Fair value is estimated by discounting cash flows at interest rates currently

being offered by, or available to, us for similar contracts.

•Without a fixed maturity:  Fair value is estimated as the amount payable to the contract holder upon

demand.  However, we have the right under such contracts to delay payment of withdrawals that

may ultimately result in paying an amount different than that determined to be payable on demand.

Long-term debt:  Fair values are based on quoted market prices for the same or similar issued debt or, if no quoted market prices are available, on the current rates estimated to be available to us for debt of similar terms and remaining maturities.

The carrying value and estimated fair value classified by level of fair value hierarchy for certain of our financial instruments at June 30, 2012 was as follows:

	Carrying Value		Estimated Fair Value
(Millions)			Level 1		Level 2		Level 3		Total
June 30, 2012
Assets:
Mortgage loans	$	1,623.9	$	—	$	—	$	1,675.2	$	1,675.2
Liabilities:
Investment contract liabilities:
With a fixed maturity	22.3		—		—		22.5		22.5
Without a fixed maturity	538.4		—		—		552.6		552.6
Long-term debt	4,706.3		—		5,592.3		—		5,592.3

The carrying value and estimated fair value of certain of our financial instruments at December 31, 2011 was as follows:

	December 31, 2011
	Carrying		Estimated
(Millions)	Value		Fair Value
Assets:
Mortgage loans	$	1,648.5	$	1,703.7
Liabilities:
Investment contract liabilities:
With a fixed maturity	34.6		34.9
Without a fixed maturity	543.9		559.4
Long-term debt	3,977.7		4,643.1

Separate Accounts Measured at Fair Value in our Balance Sheets

Separate Accounts assets in our Large Case Pensions business represent funds maintained to meet specific objectives of contract holders.  Since contract holders bear the investment risk of these assets, a corresponding Separate Accounts liability has been established equal to the assets.  These assets and liabilities are carried at fair value.  Net investment income and capital gains and losses accrue directly to such contract holders.  The assets of each account are legally segregated and are not subject to claims arising from our other businesses.  Deposits, withdrawals, net investment income and realized and unrealized capital gains and losses on Separate Accounts assets are not reflected in our statements of income, shareholders’ equity or cash flows.

Separate Accounts assets include debt and equity securities and derivative instruments.  The valuation methodologies used for these assets are similar to the methodologies described beginning on page 15.  Separate Accounts assets also include investments in common/collective trusts that are carried at fair value. Common trusts invest in other collective investment funds otherwise known as the underlying funds. The Separate Accounts’ interests in the common trust funds are based on the fair values of the investments of the underlying funds and therefore are classified as Level 2. The assets in the underlying funds primarily consist of equity securities. Investments in common trust funds are valued at their respective net asset value per share/unit on the valuation date.

Separate Accounts financial assets at June 30, 2012 and December 31, 2011 were as follows:

	June 30, 2012										December 31, 2011
(Millions)	Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
Debt securities	$	902.4	$	3,135.0		$	—	$	4,037.4		$	1,079.1	$	2,817.8		$	—	$	3,896.9
Equity securities	208.2		.6			—		208.8			240.0		—			—		240.0
Derivatives	—		(2.6		)	—		(2.6		)	—		(5.0		)	—		(5.0		)
Common/collective trusts	—		692.1			—		692.1			—		696.0			—		696.0
Total (1)	$	1,110.6	$	3,825.1		$	—	$	4,935.7		$	1,319.1	$	3,508.8		$	—	$	4,827.9

⁽¹⁾  Excludes $385.4 million and $390.3 million of cash and cash equivalents and other receivables at June 30, 2012 and December 31, 2011, respectively.

There were no transfers of Separate Accounts financial assets between Levels 1 and 2 during the three or six months ended June 30, 2012 or 2011. Gross transfers out of Level 3 were $.6 million during the three and six months ended June 30, 2012, and there were no transfers into Level 3 during the three or six months ended June 30, 2012. There were no material transfers into or out of Level 3 during the three or six months ended June 30, 2011.

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Subsequent Event (Details) (USD $)	3 Months Ended	6 Months Ended
	Sep. 30, 2011	Jun. 30, 2012
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 750,000,000	$ 750,000,000
Share Repurchase Program [Domain]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount		$ 750,000,000

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Discontinued Products (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011	Jun. 30, 2012		Jun. 30, 2011	Dec. 31, 2011
Reserve For Discontinued Products [Roll Forward]
Operating income (loss)	$ 695.7		$ 821.1	$ 1,480.0		$ 1,719.5
Assets:
Investments	20,678.0			20,678.0			20,295.0
Assets	39,452.7			39,452.7			38,593.1
Liabilities:
Policyholders' funds	1,295.4			1,295.4			1,351.6
Total liabilities	29,196.9			29,196.9			28,472.9
Discontinued Products [Member]
Reserve For Discontinued Products [Roll Forward]
Reserve, beginning of period				896.3	[1]	884.8
Operating income				(6.2)		1.5
Net realized capital gains				32.6		19.7
Reserve, end of period	922.7	[1]	906.0	922.7	[1]	906.0
Assets:
Investments	3,631.4	[1]		3,631.4	[1]		3,646.0	[1]
Other Assets	116.3	[1]		116.3	[1]		130.0	[1]
Current and deferred income taxes	22.6	[1]		22.6	[1]		15.7	[1]
Receivable from continuing products	539.3	[1],[2]		539.3	[1],[2]		523.2	[1],[2]
Assets	4,309.6	[1]		4,309.6	[1]		4,314.9	[1]
Liabilities:
Future Policy Benefits	2,933.0	[1]		2,933.0	[1]		3,005.8	[1]
Policyholders' funds	7.2	[1]		7.2	[1]		8.2	[1]
Reserve for anticipated future losses on discontinued products	922.7	[1]	906.0	922.7	[1]	906.0
Other Liabilities	446.7	[1],[3]		446.7	[1],[3]		404.6	[1],[3]
Total liabilities	4,309.6	[1]		4,309.6	[1]		4,314.9	[1]
Scheduled Contract Maturities, Settlements And Benefit Payments	100		105	201		209
Debt And Equity Securities Available For Sale [Member]
Assets:
Investments	17,686.7			17,686.7			17,390.8
Debt And Equity Securities Available For Sale [Member] | Discontinued Products [Member]
Assets:
Investments	2,555.0	[1]		2,555.0	[1]		2,589.7	[1]
Mortgage Loans [Member]
Assets:
Investments	1,623.9			1,623.9			1,648.5
Mortgage Loans [Member] | Discontinued Products [Member]
Assets:
Investments	420.4	[1]		420.4	[1]		437.1	[1]
Other Investments [Member]
Assets:
Investments	1,367.4			1,367.4			1,255.7
Other Investments [Member] | Discontinued Products [Member]
Assets:
Investments	$ 656.0	[1]		$ 656.0	[1]		$ 619.2	[1]

[1] Assets supporting the discontinued products are distinguished from assets supporting continuing products.

[2] At the time of discontinuance, a receivable from Large Case Pensions' continuing products was established on the discontinued products balance sheet. This receivable represented the net present value of anticipated cash shortfalls in the discontinued products, which will be funded from continuing products. Interest on the receivable is accrued at the discount rate that was used to calculate the reserve. The offsetting payable, on which interest is similarly accrued, is reflected in continuing products. Interest on the payable generally offsets investment income on the assets available to fund the shortfall. These amounts are eliminated in consolidation.

[3] Net unrealized capital gains on the available-for-sale debt securities are included in other liabilities and are not reflected in consolidated shareholders’ equity.

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Capital Stock (Tables)

6 Months Ended

Jun. 30, 2012

Class of Stock Disclosures [Abstract]

Dividends declared

During the six months ended June 30, 2012 our Board declared the following cash dividends:

Date Declared	Dividend Amount Per Share			Stockholders of Record Date	Date Paid/ To be Paid	Total Dividends (Millions)
February 24, 2012		$	.175	April 12, 2012	April 27, 2012		$	60.8
May 18, 2012		.175		July 12, 2012	July 27, 2012		59.2

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Financial Instruments - Separate Accounts Fair Value (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	$ 0.6
Separate Account Assets	5,321.1		5,218.2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	1,110.6	[1]	1,319.1	[1]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	3,825.1	[1]	3,508.8	[1]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0	[1]	0	[1]
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	4,935.7	[1]	4,827.9	[1]
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	902.4		1,079.1
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	3,135.0		2,817.8
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	4,037.4		3,896.9
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	208.2		240.0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0.6		0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	208.8		240.0
Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	(2.6)		(5.0)
Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	(2.6)		(5.0)
Common/Collective Trusts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Common/Collective Trusts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	692.1		696.0
Common/Collective Trusts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	0		0
Common/Collective Trusts [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	692.1		696.0
Cash and Cash Equivalents [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Separate Account Assets	$ 385.4		$ 390.3

[1] Excludes $385.4 million and $390.3 million of cash and cash equivalents and other receivables at June 30, 2012 and December 31, 2011, respectively.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12.    Commitments and Contingencies

Guaranty Fund Assessments, Market Stabilization and Other Non-Voluntary Risk Sharing Pools

Under guaranty fund laws existing in all states, insurers doing business in those states can be assessed (up to prescribed limits) for certain obligations of insolvent insurance companies to policyholders and claimants. The health insurance guaranty associations in which we participate that operate under these laws respond to insolvencies of long-term care insurers as well as health insurers.  Our assessments generally are based on a formula relating to our premiums in the state compared to the premiums of other insurers. Certain states allow assessments to be recovered as offsets to premium taxes.  Some states have similar laws relating to HMOs.  The Pennsylvania Insurance Commissioner (the "Commissioner") has placed long-term care insurer Penn Treaty Network America Insurance Company and one of its subsidiaries (collectively, “Penn Treaty”) in rehabilitation, an intermediate action before insolvency, and subsequently petitioned a state court to convert the rehabilitation into a liquidation. In May 2012, the state court denied the request and ordered the Commissioner to propose a rehabilitation plan. If the rehabilitation is not successful and Penn Treaty ultimately is placed in liquidation, we and other insurers likely would be assessed over a period of years by guaranty associations for the payments the guaranty associations are required to make to Penn Treaty policyholders.  We are currently unable to predict the ultimate outcome of, or reasonably estimate the loss or range of losses resulting from, this potential insolvency because we cannot predict whether rehabilitation efforts will succeed, the amount of the insolvency, if any, the amount and timing of associated guaranty association assessments or the amount or availability of potential offsets, such as premium tax offsets.  It is reasonably possible that in future reporting periods we may record a liability and expense relating to Penn Treaty or other insolvencies which could have a material adverse effect on our operating results, financial position and cash flows.  While we have historically recovered more than half of guaranty fund assessments through statutorily permitted premium tax offsets, significant increases in assessments could lead to legislative and/or regulatory actions that may limit future offsets.

HMOs in certain states in which we do business are subject to assessments, including market stabilization and other risk-sharing pools, for which we are assessed charges based on incurred claims, demographic membership mix and other factors. We establish liabilities for these assessments based on applicable laws and regulations. In certain states, the ultimate assessments we pay are dependent upon our experience relative to other entities subject to the assessment and the ultimate liability is not known at the balance sheet date. While the ultimate amount of the assessment is dependent upon the experience of all pool participants, we believe we have adequate reserves to cover such assessments.

Litigation and Regulatory Proceedings

Out-of-Network Benefit Proceedings

We are named as a defendant in several purported class actions and individual lawsuits arising out of our practices related to the payment of claims for services rendered to our members by health care providers with whom we do not have a contract (“out-of-network providers”).   Among other things, these lawsuits allege that we paid too little to our health plan members and/or providers for these services, among other reasons, because of our use of data provided by Ingenix, Inc., a subsidiary of one of our competitors (“Ingenix”). Other major health insurers are the subject of similar litigation or have settled similar litigation.  

Various plaintiffs who are health care providers or medical associations seek to represent nationwide classes of out-of-network providers who provided services to our members during the period from 2001 to the present.  Various plaintiffs who are members in our health plans seek to represent nationwide classes of our members who received services from out-of-network providers during the period from 2001 to the present.  Taken together, these lawsuits allege that we violated state law, the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), the Racketeer Influenced and Corrupt Organizations Act and federal antitrust laws, either acting alone or in concert with our competitors.  The purported classes seek reimbursement of all unpaid benefits, recalculation and repayment of deductible and coinsurance amounts, unspecified damages and treble damages, statutory penalties, injunctive and declaratory relief, plus interest, costs and attorneys’ fees, and seek to disqualify us from acting as a fiduciary of any benefit plan that is subject to ERISA.  Individual lawsuits that generally contain similar allegations and seek similar relief have been brought by health plan members and out-of-network providers.

The first class action case was commenced on July 30, 2007.  The federal Judicial Panel on Multi-District Litigation (the “MDL Panel”) has consolidated these class action cases in the U.S. District Court for the District of New Jersey (the “New Jersey District Court”) under the caption In re: Aetna UCR Litigation, MDL No. 2020 (“MDL 2020”).   In addition, the MDL Panel has transferred the individual lawsuits to MDL 2020.  On May 9, 2011, the New Jersey District Court dismissed the physician plaintiffs from MDL 2020 without prejudice.  The New Jersey District Court’s action followed a ruling by the United States District Court for the Southern District of Florida (the “Florida District Court”) that the physician plaintiffs were enjoined from participating in MDL 2020 due to a prior settlement and release.  The United States Court of Appeals for the Eleventh Circuit has dismissed the physician plaintiffs' appeal of the Florida District Court’s ruling.

Discovery is substantially complete in MDL 2020, several motions are pending, and briefing on class certification has been completed.  The court has not set a trial date or a timetable for deciding class certification.  We intend to vigorously defend ourselves against the claims brought in these cases.

We also have received subpoenas and/or requests for documents and other information from, and been investigated by, attorneys general and other state and/or federal regulators, legislators and agencies relating to our out-of-network benefit payment practices.  It is reasonably possible that others could initiate additional litigation or additional regulatory action against us with respect to our out-of-network benefit payment practices.

CMS Actions

On June 13, 2011, the Centers for Medicare & Medicaid Services (“CMS”) lifted the intermediate sanctions it had previously imposed on us that required us to suspend the enrollment of and marketing to new members of all Aetna Medicare Advantage and Standalone Prescription Drug Plan (“PDP”) contracts.  The sanctions related to our compliance with certain Medicare Part D requirements.  We have resumed marketing our Medicare Advantage and PDP products and have been enrolling beneficiaries with effective dates on and after July 1, 2011.  CMS still is not assigning any new low income subsidy members to our PDPs at this time.  However, low income subsidy members can make their own choice to enroll in Aetna products.  As a result of these sanctions, our 2011 Medicare membership and operating results were adversely affected because we did not participate in the annual enrollment process for 2011.  We continue to cooperate fully with CMS to address residual matters identified in connection with the sanction review.

CMS regularly audits our performance to determine our compliance with CMS’s regulations and our contracts with CMS and to assess the quality of services we provide to Medicare beneficiaries.  CMS uses various payment mechanisms to allocate and adjust premium payments to our and other companies’ Medicare plans by considering the applicable health status of Medicare members as supported by information maintained and provided by health care providers.  We collect claim and encounter data from providers and generally rely on providers to appropriately code their submissions and document their medical records.  CMS pays increased premiums to Medicare Advantage plans and PDPs for members who have certain medical conditions identified with specific diagnosis codes.  Federal regulators review and audit the providers’ medical records and related diagnosis codes that determine the members’ health status and the resulting risk-adjusted premium payments to us.  In that regard, CMS has instituted risk adjustment data validation (“RADV”) audits of various Medicare Advantage plans, including certain of the Company's plans. The Office of Inspector General (the “OIG”) also is auditing risk adjustment data, and we expect CMS and the OIG to continue auditing risk adjustment data.

On February 24, 2012, CMS published a Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation Contract-Level Audits (the "Notice"). The Notice outlines the methodology that CMS will use to determine RADV audit premium refunds payable by Medicare Advantage plans for contract years 2011 and forward. Under that methodology, the RADV audit premium refund calculation will include an adjustment for the differences in documentation standards between the RADV audits and the risk adjustment model; however, the Notice provides limited information about that adjustment. In addition, CMS will project the error rate identified in the audit sample to all risk adjusted premium payments made under the contract being audited. Historically, CMS did not make an adjustment for differences in documentation standards or project sample error rates to the entire contract. During or after August 2012, CMS will select Medicare Advantage contracts for contract year 2011 for audit. We are currently unable to predict which of our Medicare Advantage contracts will be selected for future audit, the financial impact of the documentation standard adjustment, the amounts of any retroactive refunds of, or prospective adjustments to, Medicare Advantage premium payments made to us, the effect of any such refunds or adjustments on the actuarial soundness of our Medicare Advantage bids, or whether any RADV audit findings would cause a change to our method of estimating future premium revenue in bid submissions to CMS for the current or future contract years or compromise premium assumptions made in our bids for prior contract years or the current contract year. Any premium refunds or adjustments resulting from regulatory audits, whether as a result of RADV or other audits by CMS, the OIG or otherwise, could be material and could adversely affect our operating results, financial position and cash flows.

Other Litigation and Regulatory Proceedings

We are involved in numerous other lawsuits arising, for the most part, in the ordinary course of our business operations, including employment litigation and claims of bad faith, medical malpractice, non-compliance with state and federal regulatory regimes, marketing misconduct, failure to timely or appropriately pay medical and/or group insurance claims (including post-payment audit and collection practices), rescission of insurance coverage, improper disclosure of personal information, patent infringement and other intellectual property litigation and other litigation in our Health Care and Group Insurance businesses.  Some of these other lawsuits are or are purported to be class actions.  We intend to vigorously defend ourselves against the claims brought in these matters.

In addition, our operations, current and past business practices, current and past contracts, and accounts and other books and records are subject to routine, regular and special investigations, audits, examinations and reviews by, and from time to time we receive subpoenas and other requests for information from, CMS, the U.S. Department of Health and Human Services, various state insurance and health care regulatory authorities, state attorneys general and offices of inspector general, the Center for Consumer Information and Insurance Oversight, the OIG, the Office of Personnel Management, committees, subcommittees and members of the U.S. Congress, the U.S. Department of Justice, the Federal Trade Commission, U.S. attorneys and other state and federal governmental authorities.  These government actions include inquiries by, and testimony before, certain members, committees and subcommittees of the U.S. Congress regarding certain of our current and past business practices, including our overall claims processing and payment practices, our business practices with respect to our small group products, student health products or individual customers (such as market withdrawals, rating information, premium increases and medical benefit ratios), executive compensation matters and travel and entertainment expenses, as well as the investigations by, and subpoenas and requests from, attorneys general and others described above under “Out-of-Network Benefit Proceedings.”  

There also continues to be heightened review by regulatory authorities of and increased litigation regarding the health care and related benefits industry’s business and reporting practices, including premium rate increases, utilization management, complaint, grievance and appeal processing, information privacy, provider network structure (including the use of performance-based networks), delegated arrangements, rescission of insurance coverage, limited benefit health products, student health products, pharmacy benefit management practices, sales practices, and claim payment practices (including payments to out-of-network providers and payments on life insurance policies).  For example, New York is one of over 35 states that are investigating life insurers' claims payment and related escheat practices, and these investigations have resulted in significant charges to earnings by other life insurers in connection with related settlements. We have received requests for information from New York, Connecticut and Minnesota with respect to our life insurance claim payment and related escheat practices.  

As a leading national health and related benefits company, we regularly are the subject of government actions of the types described above.  These government actions may prevent or delay us from implementing planned premium rate increases and may result, and have resulted, in restrictions on our business, changes to or clarifications of our business practices, retroactive adjustments to premiums, refunds or other payments to members, beneficiaries, states or the federal government, assessments of damages, civil or criminal fines or penalties, or other sanctions, including the possible loss of licensure or suspension or exclusion from participation in government programs, such as the intermediate sanctions previously imposed on us by CMS that are described above under “CMS Actions.”

Estimating the probable losses or a range of probable losses resulting from litigation, government actions and other legal proceedings is inherently difficult and requires an extensive degree of judgment, particularly where the matters involve indeterminate claims for monetary damages, may involve fines, penalties or punitive damages that are discretionary in amount, involve a large number of claimants or regulatory authorities, represent a change in regulatory policy, present novel legal theories, are in the early stages of the proceedings, are subject to appeal or could result in a change in business practices.  In addition, because most legal proceedings are resolved over long periods of time, potential losses are subject to change due to, among other things, new developments, changes in litigation strategy, the outcome of intermediate procedural and substantive rulings and other parties’ settlement posture and their evaluation of the strength or weakness of their case against us.  As a result, we are currently unable to predict the ultimate outcome of, or reasonably estimate the losses or a range of losses resulting from, the matters described above, and it is reasonably possible that their outcome could be material to us.

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2012

Accounting Policies [Abstract]

Interim Financial Statements

Interim Financial Statements

These interim financial statements necessarily rely on estimates, including assumptions as to annualized tax rates.  In the opinion of management, all adjustments necessary for a fair statement of results for the interim periods have been made.  All such adjustments are of a normal, recurring nature.  The accompanying unaudited consolidated financial statements and related notes should be read in conjunction with the consolidated financial statements and related notes presented in our 2011 Annual Report on Form 10-K (our “2011 Annual Report”).  Certain financial information that is normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), but that is not required for interim reporting purposes, has been condensed or omitted.  We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2011 Annual Report, unless the information contained in those disclosures materially changed and is required by GAAP.  We evaluated subsequent events that occurred after June 30, 2012 through the date the financials were issued and determined there were no other items to disclose.    

Principles of Consolidation

Principles of Consolidation

These unaudited consolidated financial statements have been prepared in accordance with GAAP and include the accounts of Aetna and the subsidiaries that we control.  All significant intercompany balances have been eliminated in consolidation.

Testing Goodwill for Impairment

Testing Goodwill for Impairment

Effective January 1, 2012, we adopted new accounting guidance for testing goodwill for impairment. Under this guidance, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of our Health Care or Group Insurance segment is less than its carrying value. If we determine that the fair value is likely greater than its carrying value, then no additional analysis is necessary, as the goodwill is not impaired. The adoption of this new guidance did not have an impact on our financial position or operating results.

Presentations of Comprehensive Income

Presentations of Comprehensive Income

Effective January 1, 2012, we adopted new presentation requirements for other comprehensive income in financial statements.  Under this new guidance, we have presented comprehensive income as a separate statement immediately following the statement of income.  This change in presentation did not have an impact on our financial position or operating results.

Fair Value Measurements

Fair Value Measurements

Effective January 1, 2012, we adopted new guidance relating to fair value measurements.  This new guidance amended and clarified certain existing fair value measurement principles and required additional disclosures for all Level 3 assets, including a qualitative discussion about the sensitivity of Level 3 fair value measurements.  The new requirements did not have an impact on our financial position or operating results.

Reconsideration of Effective Control for Repurchase Agreements

Reconsideration of Effective Control for Repurchase Agreements

Effective January 1, 2012, we adopted new guidance relating to repurchase agreements and other agreements that entitle and obligate a transferor to repurchase or redeem financial assets before maturity.  The guidance prescribes when an entity may recognize a sale upon the transfer of financial assets subject to repurchase agreements.  Since we treat these transactions as collateralized borrowings rather than sales, the adoption of this accounting guidance did not have an impact on our financial position or operating results.

Deferred Acquisition Costs

Deferred Acquisition Costs

Effective January 1, 2012, we prospectively adopted new guidance for costs associated with acquiring or renewing insurance contracts. This guidance clarified that such costs qualify for capitalization when directly related to the successful acquisition of new and renewed insurance contracts. We capitalized an immaterial amount of acquisition costs in 2011, all of which related to acquisition costs incurred subsequent to the acquisition of the Medicare Supplement business and related blocks of in-force business from Genworth in the fourth quarter of 2011. As a result, the amount of costs that would have been capitalized in 2011 if this new guidance were applied is immaterial.

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Financial Instruments - Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	$ 0.6
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	17,686.7	[1]	17,390.8	[1]
Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	17,635.0		17,353.3
US Government Agencies Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,710.3		1,559.3
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,902.9		2,860.1
Domestic Corporate Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	7,027.9		7,174.1
Foreign Corporate Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,987.0		2,855.1
Residential Mortgage Backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	998.9		900.8
Commercial Mortgage Backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,377.7		1,387.8
Other Asset-Backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	502.5		453.8
Redeemable Preferred Stock [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	127.8		162.3
Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	51.7		37.5
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	0
Investment contracts with a fixed maturity	0
Investment contracts without a fixed maturity	0
Long-term debt	0
Derivative Liabilities, Fair Value Disclosure	0		0
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	2.2		0
Assets, Fair Value Disclosure	1,448.1		1,307.8
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	0
Investment contracts with a fixed maturity	0
Investment contracts without a fixed maturity	0
Long-term debt	5,592.3
Derivative Liabilities, Fair Value Disclosure	0.5		0.1
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	1.9		2.0
Assets, Fair Value Disclosure	16,014.5		15,866.0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	1,675.2
Investment contracts with a fixed maturity	22.5
Investment contracts without a fixed maturity	552.6
Long-term debt	0
Derivative Liabilities, Fair Value Disclosure	0		0
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	0		0
Assets, Fair Value Disclosure	228.2		219.0
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, Fair Value Disclosure	0.5		0.1
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	4.1		2.0
Assets, Fair Value Disclosure	17,690.8		17,392.8
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,427.5		1,307.0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	16,012.6		15,864.0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	194.9		182.3
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	17,635.0		17,353.3
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,427.5		1,307.0
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	282.8		252.3
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,710.3		1,559.3
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,901.3		2,858.4
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1.6		1.7
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,902.9		2,860.1
Fair Value, Measurements, Recurring [Member] | Domestic Corporate Debt Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Domestic Corporate Debt Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	6,968.9		7,122.5
Fair Value, Measurements, Recurring [Member] | Domestic Corporate Debt Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	59.0		51.6
Fair Value, Measurements, Recurring [Member] | Domestic Corporate Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	7,027.9		7,174.1
Fair Value, Measurements, Recurring [Member] | Foreign Corporate Debt Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Foreign Corporate Debt Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,925.6		2,805.7
Fair Value, Measurements, Recurring [Member] | Foreign Corporate Debt Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	61.4		49.4
Fair Value, Measurements, Recurring [Member] | Foreign Corporate Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2,987.0		2,855.1
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	998.9		900.8
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	998.9		900.8
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,351.7		1,358.3
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	26.0		29.5
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,377.7		1,387.8
Fair Value, Measurements, Recurring [Member] | Other Asset-Backed Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Other Asset-Backed Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	471.3		419.4
Fair Value, Measurements, Recurring [Member] | Other Asset-Backed Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	31.2		34.4
Fair Value, Measurements, Recurring [Member] | Other Asset-Backed Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	502.5		453.8
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	112.1		146.6
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	15.7		15.7
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	127.8		162.3
Fair Value, Measurements, Recurring [Member] | Brokered Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	127.0		107.0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	18.4		0.8
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	33.3		36.7
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	51.7		37.5
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	1,675.2		1,703.7
Investment contracts with a fixed maturity	22.5		34.9
Investment contracts without a fixed maturity	552.6		559.4
Long-term debt	5,592.3		4,643.1
Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	22.7
Assets, Fair Value Disclosure [Abstract]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	$ 1.8

[1] Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products). At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products. Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

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Investments - Debt Securities by Maturity (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Available-for-sale Securities, Debt Maturities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	$ 17,686.7	[1]	$ 17,390.8	[1]
Debt Securities [Member]
Available-for-sale Securities, Debt Maturities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	17,635.0		17,353.3
Available-for-sale Securities With Established Maturities [Member]
Available-for-sale Securities, Debt Maturities [Abstract]
Due To Mature Less Than One Year	871.7
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	3,641.4
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	5,065.9
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	5,176.9
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Weighted average duration of securities, available-for-sale	1.7
Available-for-sale Securities, Debt Maturities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	998.9		900.8
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Weighted average duration of securities, available-for-sale	3.4
Available-for-sale Securities, Debt Maturities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,377.7		1,387.8
Other Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Weighted average duration of securities, available-for-sale	3.4
Available-for-sale Securities, Debt Maturities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	$ 502.5		$ 453.8

[1] Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 15 beginning on page 25 for additional information on our accounting for discontinued products). At June 30, 2012, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $524.0 million and gross unrealized capital losses of $30.5 million and, at December 31, 2011, debt and equity securities with a fair value of $4.0 billion, gross unrealized capital gains of $505.6 million and gross unrealized capital losses of $48.2 million were included in total debt and equity securities, but support our experience-rated and discontinued products. Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.

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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Amortization of prior service cost, before tax	$ 1.0	$ 0.9	$ 2.0	$ 2.0
Net Unrealized Gains (Losses) Previously Impaired Securities [Member]
Net unrealized gains (losses), before tax	8.8	3.7	4.0	3.2
Reclassification of (gains) losses to earnings, before tax	10.2	8.7	5.1	22.2
Other Securities [Member]
Net unrealized gains (losses), before tax	148.5	179.8	239.5	158.0
Reclassification of (gains) losses to earnings, before tax	16.2	38.6	68.9	58.8
Foreign Currency Gain (Loss) [Member]
Reclassification of (gains) losses to earnings, before tax	(1.2)	(1.1)	(2.3)	(2.1)
Reclassification of losses to earnings, before tax	(7.2)	(8.3)	(0.6)	(5.7)
Pension and OPEB Plan [Member]
Amortization of net actuarial losses, before tax	$ (18.8)	$ (15.8)	$ (37.4)	$ (31.6)

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Organization

6 Months Ended

Jun. 30, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

1. Organization

We conduct our operations in three business segments:

• Health Care consists of medical, pharmacy benefit management services, dental, behavioral health and vision plans offered on both an Insured basis (where we assume all or a majority of the risk for medical and dental care costs) and an employer-funded basis (where the plan sponsor under an administrative services contract (“ASC”) assumes all or a majority of this risk). Medical products include point-of-service (“POS”), preferred provider organization (“PPO”), health maintenance organization (“HMO”) and indemnity benefit plans. Medical products also include health savings accounts ("HSAs") and Aetna HealthFund^®, consumer-directed health plans that combine traditional POS or PPO and/or dental coverage, subject to a deductible, with an accumulating benefit account (which may be funded by the plan sponsor and/or the member in the case of HSAs). We also offer Medicare and Medicaid products and services, as well as specialty products, such as health information technology services, medical management and data analytics services, medical stop loss insurance, and products that provide access to our provider network in select geographies.

• Group Insurance primarily includes group life insurance products offered on an Insured basis, including basic and supplemental group term life, group universal life, supplemental or voluntary programs and accidental death and dismemberment coverage. Group Insurance also includes (i) group disability products offered to employers on both an Insured and an ASC basis which consist primarily of short-term and long-term disability insurance (and products which combine both), (ii) absence management services offered to employers, which include short-term and long-term disability administration and leave management, and (iii) long-term care products that were offered primarily on an Insured basis, which provide benefits covering the cost of care in private home settings, adult day care, assisted living or nursing facilities. We no longer solicit or accept new long-term care customers.

• Large Case Pensions manages a variety of retirement products (including pension and annuity products) primarily for tax qualified pension plans. These products provide a variety of funding and benefit payment distribution options and other services. Large Case Pensions also includes certain discontinued products (refer to Note 15 beginning on page 25 for additional information).

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Capital Stock - Stock Units (Details) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Vesting Percentage During Performance Period For Performance Stock Units	0.00%
Maximum Vesting Percentage During Performance Period For Performance Stock Units	200.00%
Vesting Percentage For Market Stock Units Range Minimum	0.00%
Vesting Percentage For Market Stock Units Range Maximum	150.00%
Percentage Vested At Conclusion Of Vesting Period (Market Stock Unit)	150.00%
Percentage Restricted Stock Units Vested In Three Years	100.00%
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0.5
Market Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1.1
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1.1

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Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Earnings Per Share

The computations of basic and diluted EPS for the three and six months ended June 30, 2012 and 2011 are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Millions, except per common share data)	2012		2011		2012		2011
Net income	$	457.6	$	536.7	$	968.6	$	1,122.7
Weighted average shares used to compute basic EPS	341.7		379.2		346.0		381.3
Dilutive effect of outstanding stock-based compensation awards (1)	4.5		8.1		5.5		7.9
Weighted average shares used to compute diluted EPS	346.2		387.3		351.5		389.2
Basic EPS	$	1.34	$	1.42	$	2.80	$	2.94
Diluted EPS	$	1.32	$	1.39	$	2.76	$	2.88

⁽¹⁾  Stock-based compensation awards are not included in the calculation of diluted EPS if the exercise price is greater than the average market price of Aetna common shares during the period (i.e., the awards are anti-dilutive).  Approximately 7.5 million and 7.4 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2012, respectively, and 12.6 million and 12.8 million stock appreciation rights were not included in the calculation of diluted EPS for the three and six months ended June 30, 2011, respectively, because they were anti-dilutive.

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Operating Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Selling expenses	$ 271.4	$ 267.2	$ 547.7	$ 557.9
General and administrative expenses:
Salaries and related benefits	754.2	786.8	1,556.3	1,550.6
Other general and administrative expenses	620.8	537.7	1,208.4	1,046.7
Total general and administrative expenses	1,375.0	1,324.5	2,764.7	2,597.3
Total operating expenses	$ 1,646.4	$ 1,591.7	$ 3,312.4	$ 3,155.2

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Dividend Restrictions and Statutory Surplus

6 Months Ended

Jun. 30, 2012

Dividend Restrictions and Statutory Surplus [Abstract]

Dividend Restrictions and Statutory Surplus

11.    Dividend Restrictions and Statutory Surplus

Under regulatory requirements at June 30, 2012, the amount of dividends that may be paid through the end of 2012 by our insurance and HMO subsidiaries without prior approval by regulatory authorities is approximately $1.0 billion in the aggregate.  There are no such restrictions on distributions from Aetna to its shareholders.  In the second quarter of 2012, our insurance and HMO subsidiaries paid approximately $501 million of dividends to the Company.

The combined statutory capital and surplus of our insurance and HMO subsidiaries was $6.6 billion and $5.9 billion at June 30, 2012 and December 31, 2011, respectively.