Consolidated Balance Sheets - USD ($) $ in Millions		Mar. 31, 2018	Dec. 31, 2017
Securities available for sale, at fair value:
Fixed maturities	[1]	$ 89,033
Securities held to maturity, at amortized cost:
Fixed maturities		33,377	$ 31,430
Equity securities, at fair value:
Equity securities	[2],[3]	1,108
Other investments	[4]	5,073	3,402
Cash and cash equivalents		4,080	3,491
Total investments and cash		132,671	123,659
Receivables		906	827
Accrued investment income		745	769
Deferred policy acquisition costs		9,933	9,505
Property and equipment, at cost less accumulated depreciation		448	434
Other	[5]	2,653	2,023
Total assets		147,356	137,217
Policy Liabilities:
Future policy benefits		87,268	81,857
Unpaid policy claims		4,630	4,392
Unearned premiums		6,084	5,959
Other policyholders’ funds		7,417	6,939
Total policy liabilities		105,399	99,147
Income taxes		4,407	4,745
Payables for return of cash collateral on loaned securities		5,368	606
Notes payable		5,372	5,289
Other	[6]	2,523	2,832
Total liabilities		123,069	112,619
Shareholders’ equity:
Common stock of $.10 par value. In thousands: authorized 3,800,000 shares in 2018 and 2017; issued 1,346,776 shares in 2018 and 1,345,762 shares in 2017		135	135
Additional paid-in capital		2,089	2,052
Retained earnings		30,183	29,895
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(1,303)	(1,750)
Unrealized gain (losses) on fixed maturity securities	[7],[8]	5,206	5,964
Unrealized gains (losses) on derivatives		(21)	(23)
Pension liability adjustment		(197)	(163)
Treasury stock, at average cost		(11,805)	(11,512)
Total shareholders’ equity		24,287	24,598
Total liabilities and shareholders’ equity		147,356	137,217
Consolidated Entity Excluding Variable Interest Entities (VIE)
Securities available for sale, at fair value:
Fixed maturities	[9]	83,602	78,804
Securities held to maturity, at amortized cost:
Fixed maturities		33,377	31,430
Equity securities, at fair value:
Equity securities	[9]	348
Available-for-sale securities, equity securities	[9]		270
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities	[9],[10]	5,431	5,509
Equity securities, at fair value:
Equity securities		760
Available-for-sale securities, equity securities			753
Other investments	[11]	3,994	2,341
Policy Liabilities:
Total liabilities		$ 86	$ 128

[1] Includes perpetual securities, categorized in accordance with their respective economic maturities (the expected maturity date created by the combination of features in the financial instrument)

[2] Includes perpetual securities

[3] Includes perpetual securities ($71 at fair value)

[4] Includes $3,994 in 2018 and $2,341 in 2017 of loan receivables and limited partnerships from consolidated variable interest entities

[5] Includes $241 in 2018 and $151 in 2017 of derivatives from consolidated variable interest entities

[6] Includes $86 in 2018 and $128 in 2017 of derivatives from consolidated variable interest entities

[7] See Note 1 for discussion of the accounting treatment of tax on amounts recorded in accumulated other comprehensive income pursuant to the Tax Act and for the adoption of accounting guidance on January 1, 2018 related to financial instruments.

[8] See Note 1 of the Notes to the Consolidated Financial Statements for the adoption of accounting guidance on January 1, 2018 related to financial instruments.

[9] Includes perpetual securities, see Notes 1 and 3 of the Notes to the Consolidated Financial Statements

[10] Includes perpetual securities

[11] Consists of TREs, CMLs, MMLs, and alternative investments in limited partnerships