Investments (Unconsolidated Variable Interest Entities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Variable Interest Entity [Line Items]
Total Assets	$ 78,522	$ 84,541
Total Liabilities	80,864	86,334
Real estate joint ventures [Member]
Variable Interest Entity [Line Items]
Total Assets	70	150
Total Liabilities	71	157
Other limited partnership interests [Member]
Variable Interest Entity [Line Items]
Total Assets	5,041	4,436
Total Liabilities	6,994	5,908
Trading securities [Member]
Variable Interest Entity [Line Items]
Total Assets	619	563
Total Liabilities	619	563
Mortgage loans, net [Member]
Variable Interest Entity [Line Items]
Total Assets	106	351
Total Liabilities	106	351
Other invested assets [Member]
Variable Interest Entity [Line Items]
Total Assets	1,509	1,117
Total Liabilities	1,897	1,431
Structured securities (RMBS, CMBS, and ABS) [Member]
Variable Interest Entity [Line Items]
Total Assets	67,176	72,605
Total Liabilities	67,176	72,605
U.S. corporate and foreign corporate securities [Member]
Variable Interest Entity [Line Items]
Total Assets	3,966	5,287
Total Liabilities	3,966	5,287
Non-redeemable preferred stock [Member]
Variable Interest Entity [Line Items]
Total Assets	35	32
Total Liabilities	$ 35	$ 32