Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Securities held to maturity, at amortized cost:
Fixed maturities		$ 31,430	$ 33,350
Other investments	[1]	3,402	1,450
Cash and cash equivalents		3,491	4,859
Total investments and cash		123,659	116,361
Receivables		827	669
Accrued investment income		769	754
Deferred policy acquisition costs		9,505	8,993
Property and equipment, at cost less accumulated depreciation		434	433
Other	[2]	2,023	2,609
Total assets		137,217	129,819
Policy liabilities:
Future policy benefits		81,857	76,106
Unpaid policy claims		4,392	4,045
Unearned premiums		5,959	6,916
Other policyholders' funds		6,939	6,659
Total policy liabilities		99,147	93,726
Income taxes		4,745	5,387
Payables for return of cash collateral on loaned securities		606	526
Notes payable		5,289	5,360
Other	[3]	2,832	4,338
Commitments and contingent liabilities (Note 15)
Total liabilities		112,619	109,337
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2017 and 2016; issued 672,881 shares in 2017 and 671,249 shares in 2016		67	67
Additional paid-in capital		2,120	1,976
Retained earnings		29,895	25,981
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(1,750)	(1,983)
Unrealized gains (losses) on investment securities		5,964	4,805
Unrealized gains (losses) on derivatives		(23)	(24)
Pension liability adjustment		(163)	(168)
Treasury stock, at average cost		(11,512)	(10,172)
Total shareholders' equity		24,598	20,482
Total liabilities and shareholders' equity		137,217	129,819
Consolidated Entity Excluding Variable Interest Entities (VIE)
Securities available for sale, at fair value:
Fixed maturities		77,230	68,778
Perpetual securities		1,574	1,425
Equity securities		270	265
Securities held to maturity, at amortized cost:
Fixed maturities		31,430	33,350
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities		5,294	4,982
Perpetual securities		215	208
Equity securities		753	1,044
Securities held to maturity, at amortized cost:
Other investments	[4]	2,341	819
Policy liabilities:
Total liabilities		$ 128	$ 146

[1] Includes $2,341 in 2017 and $819 in 2016 of loan receivables and limited partnerships from consolidated variable interest entities

[2] Includes $151 in 2017 and $127 in 2016 of derivatives from consolidated variable interest entities

[3] Includes $128 in 2017 and $146 in 2016 of derivatives from consolidated variable interest entities

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