Consolidated Investment Entities (Details) (Consolidated Investment Entities:, USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Liabilities:
Debt	$ 4,769	$ 4,712
Other liabilities	90	85
Recurring \| Level 1
Assets
Investments:	106	75
Total assets at fair value	106	75
Recurring \| Level 1 \| Common Stocks
Assets
Investments:	106	75
Recurring \| Level 2
Assets
Investments:	4,502	4,355
Receivables	28	39
Other assets	2	2
Total assets at fair value	4,532	4,396
Liabilities:
Other liabilities	90	85
Total liabilities at fair value	90	85
Recurring \| Level 2 \| Corporate debt securities
Assets
Investments:	295	314
Recurring \| Level 2 \| Common Stocks
Assets
Investments:	34	25
Recurring \| Level 2 \| Other structured investments
Assets
Investments:	57	54
Recurring \| Level 2 \| Syndicated loans
Assets
Investments:	4,116	3,962
Recurring \| Level 3
Assets
Investments:	207	359
Other assets	1,035	1,108
Total assets at fair value	1,242	1,467
Liabilities:
Debt	4,769	4,712
Total liabilities at fair value	4,769	4,712
Recurring \| Level 3 \| Corporate debt securities
Assets
Investments:	4	4
Recurring \| Level 3 \| Common Stocks
Assets
Investments:	8	13
Recurring \| Level 3 \| Syndicated loans
Assets
Investments:	195	342
Recurring \| Total
Assets
Investments:	4,815	4,789
Receivables	28	39
Other assets	1,037	1,110
Total assets at fair value	5,880	5,938
Liabilities:
Debt	4,769	4,712
Other liabilities	90	85
Total liabilities at fair value	4,859	4,797
Recurring \| Total \| Corporate debt securities
Assets
Investments:	299	318
Recurring \| Total \| Common Stocks
Assets
Investments:	148	113
Recurring \| Total \| Other structured investments
Assets
Investments:	57	54
Recurring \| Total \| Syndicated loans
Assets
Investments:	$ 4,311	$ 4,304

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