Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Securities available for sale, at fair value:
Equity securities (cost $17 in 2013 and $20 in 2012)	$ 22		$ 23
Securities held to maturity, at amortized cost:
Fixed maturities	42,718		54,426
Other investments	164		174
Cash and cash equivalents	2,388		2,041
Total investments and cash	103,936		118,219
Receivables	889		976
Accrued investment income	820		842
Deferred policy acquisition costs	9,028		9,658
Property and equipment, at cost less accumulated depreciation	510		564
Other	1,130	[1]	835	[1]
Total assets	116,313		131,094
Policy liabilities:
Future policy benefits	70,297		76,463
Unpaid policy claims	3,760		4,034
Unearned premiums	11,551		11,904
Other policyholders' funds	5,018		5,319
Total policy liabilities	90,626		97,720
Income taxes	3,363		3,858
Payables for return of cash collateral on loaned securities	1,506		6,277
Notes payable	4,946		4,352
Other	2,176	[2]	2,909	[2]
Commitments and contingent liabilities (Note 10)
Total liabilities	102,617		115,116
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2013 and 2012; issued 666,009 shares in 2013 and 665,239 shares in 2012	67		67
Additional paid-in capital	1,562		1,505
Retained earnings	18,841		17,387
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)	(453)		333
Unrealized gains (losses) on investment securities	(198)		2,570
Unrealized gains (losses) on derivatives	(11)		(5)
Pension liability adjustment	(178)		(183)
Treasury stock, at average cost	(5,934)		(5,696)
Total shareholders' equity	13,696		15,978
Total liabilities and shareholders' equity	116,313		131,094
Investments Other Than Consolidated Variable Interest Entities
Securities available for sale, at fair value:
Fixed maturities	50,788		51,466
Perpetual securities	2,384		3,728
Securities held to maturity, at amortized cost:
Fixed maturities	42,464		54,137
Variable Interest Entity, Consolidated
Securities available for sale, at fair value:
Fixed maturities	5,022		5,787
Perpetual securities	450		574
Securities held to maturity, at amortized cost:
Fixed maturities	$ 254		$ 289

[1] Includes $135 in 2013 and $191 in 2012 of derivatives from consolidated variable interest entities

[2] Includes $284 in 2013 and $399 in 2012 of derivatives from consolidated variable interest entities