Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Securities available for sale, at fair value:
Equity securities (cost $21 in 2012 and $22 in 2011)	$ 23		$ 25
Securities held to maturity, at amortized cost:
Fixed maturities	52,413		47,009
Other investments	176		168
Cash and cash equivalents	2,130		2,249
Total investments and cash	109,255		103,462
Receivables	747		680
Accrued investment income	813		802
Deferred policy acquisition costs	9,961		9,789
Property and equipment, at cost less accumulated depreciation	603		617
Other	830	[1]	887	[1]
Total assets	122,209		116,237
Policy liabilities:
Future policy benefits	80,078		79,278
Unpaid policy claims	4,057		3,981
Unearned premiums	2,068		1,704
Other policyholders' funds	13,210		9,630
Total policy liabilities	99,413		94,593
Notes payable	3,672		3,285
Income taxes	2,635		2,308
Payables for return of cash collateral on loaned securities	192		838
Other	2,118	[2]	2,267	[2]
Commitments and contingent liabilities (Note 10)
Total liabilities	108,030		103,291
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2012 and 2011; issued 664,532 shares in 2012 and 663,639 shares in 2011	66		66
Additional paid-in capital	1,453		1,408
Retained earnings	16,108		15,148
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains	865		984
Unrealized gains (losses) on investment securities:
Unrealized gains (losses) on securities not other-than-temporarily impaired	1,470		1,143
Unrealized gains (losses) on derivatives	4		9
Pension liability adjustment	(168)		(171)
Treasury stock, at average cost	(5,619)		(5,641)
Total shareholders' equity	14,179		12,946
Total liabilities and shareholders' equity	122,209		116,237
Investments Other Than Consolidated Variable Interest Entities
Securities available for sale, at fair value:
Fixed maturities	44,036		42,222
Perpetual securities	3,966		5,149
Securities held to maturity, at amortized cost:
Fixed maturities	52,098		46,366
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities	5,745		5,350
Perpetual securities	766		1,290
Securities held to maturity, at amortized cost:
Fixed maturities	$ 315		$ 643

[1] Includes $281 in 2012 and $375 in 2011 of derivatives from consolidated variable interest entities

[2] Includes $474 in 2012 and $531 in 2011 of derivatives from consolidated variable interest entities