Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Securities available for sale, at fair value:
Equity securities (cost $22 in 2011 and 2010)	$ 25		$ 23
Securities held to maturity, at amortized cost:
Fixed maturities	47,009		30,084
Other investments	168		135
Cash and cash equivalents	2,249		2,121
Total investments and cash	103,462		88,230
Receivables	680		661
Accrued investment income	802		738
Deferred policy acquisition costs	10,654		9,734
Property and equipment, at cost less accumulated depreciation	617		620
Other	887	[1]	1,056	[1]
Total assets	117,102		101,039
Policy liabilities:
Future policy benefits	79,278		72,103
Unpaid policy claims	3,981		3,719
Unearned Premiums	1,704		1,197
Other policyholders' funds	9,630		5,437
Total policy liabilities	94,593		82,456
Notes payable	3,285		3,038
Income taxes	2,613		1,969
Payables for return of cash collateral on loaned securities	838		191
Other	2,267	[2]	2,329	[2]
Commitments and contingent liabilities (Note 14)
Total liabilities	103,596		89,983
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2011 and 2010; issued 663,639 shares in 2011 and 662,660 shares in 2010	66		66
Additional paid-in capital	1,408		1,320
Retained earnings	15,583		14,194
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains	1,109		926
Unrealized gains (losses) on investment securities:
Unrealized gains (losses) on securities not other-than-temporarily impaired	1,143		36
Unrealized gains (losses) on other-than-temporarily impaired securities	0		(3)
Unrealized gains (losses) on derivatives	9		31
Pension liability adjustment	(171)		(128)
Treasury stock, at average cost	(5,641)		(5,386)
Total shareholders' equity	13,506		11,056
Total liabilities and shareholders' equity	117,102		101,039
Investments other than Consolidated Variable Interest Entities
Securities available for sale, at fair value:
Fixed maturities	42,222		43,100
Perpetual securities	5,149		5,974
Securities held to maturity, at amortized cost:
Fixed maturities	46,366		29,470
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities	5,350		5,255
Perpetual securities	1,290		1,538
Securities held to maturity, at amortized cost:
Fixed maturities	$ 643		$ 614

[1] Includes $375 in 2011 and $564 in 2010 of derivatives from consolidated variable interest entities

[2] Includes $531 in 2011 and $741 in 2010 of derivatives from consolidated variable interest entities