Consolidated Investment Entities (Asset & Liability Balances) (Details) (Consolidated investment entities [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Liabilities
Debt	$ 5,466	$ 4,804
Other liabilities	81	193
Recurring basis [Member] | Level 1 [Member]
Assets
Investments	156	150
Total assets at fair value	156	150
Recurring basis [Member] | Level 1 [Member] | Common stocks [Member]
Assets
Investments	152	147
Recurring basis [Member] | Level 1 [Member] | Other Investments [Member]
Assets
Investments	4	3
Recurring basis [Member] | Level 2 [Member]
Assets
Investments	5,184	4,468
Receivables	28	32
Other assets	1	13
Total assets at fair value	5,213	4,513
Liabilities
Other liabilities	81	193
Total liabilities at fair value	81	193
Recurring basis [Member] | Level 2 [Member] | Corporate debt securities [Member]
Assets
Investments	183	200
Recurring basis [Member] | Level 2 [Member] | Common stocks [Member]
Assets
Investments	44	31
Recurring basis [Member] | Level 2 [Member] | Other Investments [Member]
Assets
Investments	25	33
Recurring basis [Member] | Level 2 [Member] | Syndicated loans [Member]
Assets
Investments	4,932	4,204
Recurring basis [Member] | Level 3 [Member]
Assets
Investments	321	384
Other assets	2,017	1,936
Total assets at fair value	2,338	2,320
Liabilities
Debt	5,466	4,804
Total liabilities at fair value	5,466	4,804
Recurring basis [Member] | Level 3 [Member] | Corporate debt securities [Member]
Assets
Investments		2
Recurring basis [Member] | Level 3 [Member] | Common stocks [Member]
Assets
Investments	7	14
Recurring basis [Member] | Level 3 [Member] | Syndicated loans [Member]
Assets
Investments	314	368
Recurring basis [Member] | Total [Member]
Assets
Investments	5,661	5,002
Receivables	28	32
Other assets	2,018	1,949
Total assets at fair value	7,707	6,983
Liabilities
Debt	5,466	4,804
Other liabilities	81	193
Total liabilities at fair value	5,547	4,997
Recurring basis [Member] | Total [Member] | Corporate debt securities [Member]
Assets
Investments	183	202
Recurring basis [Member] | Total [Member] | Common stocks [Member]
Assets
Investments	203	192
Recurring basis [Member] | Total [Member] | Other Investments [Member]
Assets
Investments	29	36
Recurring basis [Member] | Total [Member] | Syndicated loans [Member]
Assets
Investments	$ 5,246	$ 4,572