Closed Block (Liabilities and Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Closed Block Liabilities
Future policy benefits	$ 42,076	$ 42,586
Other policy-related balances	298	298
Policyholder dividends payable	456	466
Policyholder dividend obligation	1,771	3,828	2,919	876
Current income tax payable	18	0
Other liabilities	582	602
Total closed block liabilities	45,201	47,780
Assets Designated to the Closed Block
Fixed maturity securities available-for-sale, at estimated fair value	28,374	30,546
Equity securities available-for-sale, at estimated fair value	86	41
Mortgage loans	6,155	6,192
Policy loans	4,669	4,670
Real estate and real estate joint ventures	492	459
Other invested assets	814	953
Total investments	40,590	42,861
Cash and cash equivalents	238	381
Accrued investment income	477	481
Premiums, reinsurance and other receivables	98	107
Current income tax recoverable	0	2
Deferred income tax assets	293	319
Total assets designated to the closed block	41,696	44,151
Excess of closed block liabilities over assets designated to the closed block	3,505	3,629
Amounts included in AOCI:
Unrealized investment gains (losses), net of income tax	1,502	2,891
Unrealized gains (losses) on derivatives, net of income tax	(3)	9
Allocated to policyholder dividend obligation, net of income tax	(1,151)	(2,488)
Total amounts included in AOCI	348	412
Maximum future earnings to be recognized from closed block assets and liabilities	$ 3,853	$ 4,041