Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Securities available for sale, at fair value:
Equity securities (cost $22 in 2012 and 2011)	$ 24		$ 25
Securities held to maturity, at amortized cost:
Fixed maturities	60,054		47,009
Other investments	185		168
Cash and cash equivalents	2,985		2,249
Total investments and cash	124,215		103,462
Receivables	1,005		680
Accrued investment income	793		802
Deferred policy acquisition costs	10,283		9,789
Property and equipment, at cost less accumulated depreciation	625		617
Other	919	[1]	887	[1]
Total assets	137,840		116,237
Policy liabilities:
Future policy benefits	83,065		79,278
Unpaid policy claims	4,267		3,981
Unearned premiums	2,315		1,704
Other policyholders' funds	15,681		9,630
Total policy liabilities	105,328		94,593
Notes payable	4,401		3,285
Income taxes	3,263		2,308
Payables for return of cash collateral on loaned securities	6,591		838
Other	2,272	[2]	2,267	[2]
Commitments and contingent liabilities (Note 10)
Total liabilities	121,855		103,291
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2012 and 2011; issued 664,796 shares in 2012 and 663,639 shares in 2011	66		66
Additional paid-in capital	1,473		1,408
Retained earnings	16,969		15,148
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains	1,011		984
Unrealized gains (losses) on investment securities	2,260		1,143
Unrealized gains (losses) on derivatives	5		9
Pension liability adjustment	(189)		(171)
Treasury stock, at average cost	(5,610)		(5,641)
Total shareholders' equity	15,985		12,946
Total liabilities and shareholders' equity	137,840		116,237
Investments Other Than Consolidated Variable Interest Entities
Securities available for sale, at fair value:
Fixed maturities	50,238		42,222
Perpetual securities	4,132		5,149
Securities held to maturity, at amortized cost:
Fixed maturities	59,732		46,366
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities	6,010		5,350
Perpetual securities	587		1,290
Securities held to maturity, at amortized cost:
Fixed maturities	$ 322		$ 643

[1] Includes $351 in 2012 and $375 in 2011 of derivatives from consolidated variable interest entities

[2] Includes $436 in 2012 and $531 in 2011 of derivatives from consolidated variable interest entities