Consolidated Investment Entities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 subsidiary	Mar. 31, 2014 Consolidated Investment Entities:	Dec. 31, 2013 Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 1 Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 1 Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 1 Corporate debt securities Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 1 Corporate debt securities Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 1 Common stocks Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 1 Common stocks Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 1 Other Investments [Member] Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 1 Other Investments [Member] Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 1 Syndicated loans Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 1 Syndicated loans Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 2 Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 2 Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 2 Corporate debt securities Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 2 Corporate debt securities Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 2 Common stocks Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 2 Common stocks Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 2 Other Investments [Member] Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 2 Other Investments [Member] Consolidated Investment Entities:	Mar. 31, 2014 Recurring Level 2 Syndicated loans Consolidated Investment Entities:	Dec. 31, 2013 Recurring Level 2 Syndicated loans Consolidated Investment Entities:	Mar. 31, 2014 Recurring Fair Value, Inputs, Level 3 [Member] Consolidated Investment Entities:	Dec. 31, 2013 Recurring Fair Value, Inputs, Level 3 [Member] Consolidated Investment Entities:	Mar. 31, 2014 Recurring Fair Value, Inputs, Level 3 [Member] Corporate debt securities Consolidated Investment Entities:	Dec. 31, 2013 Recurring Fair Value, Inputs, Level 3 [Member] Corporate debt securities Consolidated Investment Entities:	Mar. 31, 2014 Recurring Fair Value, Inputs, Level 3 [Member] Common stocks Consolidated Investment Entities:	Dec. 31, 2013 Recurring Fair Value, Inputs, Level 3 [Member] Common stocks Consolidated Investment Entities:	Mar. 31, 2014 Recurring Fair Value, Inputs, Level 3 [Member] Other Investments [Member] Consolidated Investment Entities:	Dec. 31, 2013 Recurring Fair Value, Inputs, Level 3 [Member] Other Investments [Member] Consolidated Investment Entities:	Mar. 31, 2014 Recurring Fair Value, Inputs, Level 3 [Member] Syndicated loans Consolidated Investment Entities:	Dec. 31, 2013 Recurring Fair Value, Inputs, Level 3 [Member] Syndicated loans Consolidated Investment Entities:	Mar. 31, 2014 Recurring Total Consolidated Investment Entities:	Dec. 31, 2013 Recurring Total Consolidated Investment Entities:	Mar. 31, 2014 Recurring Total Corporate debt securities Consolidated Investment Entities:	Dec. 31, 2013 Recurring Total Corporate debt securities Consolidated Investment Entities:	Mar. 31, 2014 Recurring Total Common stocks Consolidated Investment Entities:	Dec. 31, 2013 Recurring Total Common stocks Consolidated Investment Entities:	Mar. 31, 2014 Recurring Total Other Investments [Member] Consolidated Investment Entities:	Dec. 31, 2013 Recurring Total Other Investments [Member] Consolidated Investment Entities:	Mar. 31, 2014 Recurring Total Syndicated loans Consolidated Investment Entities:	Dec. 31, 2013 Recurring Total Syndicated loans Consolidated Investment Entities:
Assets and liabilities measured at fair value on a recurring basis:
Number of variable interest or voting rights entities consolidated	1
Assets
Investments:				$ 170	$ 150	$ 0	$ 0	$ 166	$ 147	$ 4	$ 3	$ 0	$ 0	$ 4,820	$ 4,468	$ 152	$ 200	$ 40	$ 31	$ 33	$ 33	$ 4,595	$ 4,204	$ 407	$ 384	$ 13	$ 2	$ 10	$ 14	$ 0	$ 0	$ 384	$ 368	$ 5,397	$ 5,002	$ 165	$ 202	$ 216	$ 192	$ 37	$ 36	$ 4,979	$ 4,572
Receivables				0	0									36	32									0	0									36	32
Other assets				0	0									2	13									1,993	1,936									1,995	1,949
Total assets at fair value				170	150									4,858	4,513									2,400	2,320									7,428	6,983
Liabilities
Debt		5,225	4,804	0	0									0	0									5,225	4,804									5,225	4,804
Other liabilities		238	193	0	0									238	193									0										238	193
Total liabilities at fair value				$ 0	$ 0									$ 238	$ 193									$ 5,225	$ 4,804									$ 5,463	$ 4,997