Consolidated Investment Entities (Fair Value Unobservable Inputs) (Details 3) (Consolidated investment entities [Member], USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Summary of the significant unobservable inputs
Debt	$ 5,466	$ 4,804
Other assets [Member] | Minimum [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Equivalent yield	4.10%	4.40%
Expected rental value (per square foot)	3	3	[1]
Other assets [Member] | Maximum [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Equivalent yield	12.00%	12.40%
Expected rental value (per square foot)	103	165	[1]
Other assets [Member] | Weighted average [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Equivalent yield	6.70%	7.40%
Expected rental value (per square foot)	35	27	[1]
Debt [Member] | Discounted cash flow [Member]
Summary of the significant unobservable inputs
Annual default rate	2.50%	2.50%
Debt [Member] | Minimum [Member] | Discounted cash flow [Member]
Summary of the significant unobservable inputs
Discount rate	1.30%	1.50%
Constant prepayment rate	5.00%	5.00%
Loss recovery	36.40%	36.40%
Debt [Member] | Maximum [Member] | Discounted cash flow [Member]
Summary of the significant unobservable inputs
Discount rate	7.30%	8.30%
Constant prepayment rate	10.00%	10.00%
Loss recovery	63.60%	63.60%
Debt [Member] | Weighted average [Member] | Discounted cash flow [Member]
Summary of the significant unobservable inputs
Discount rate	2.50%	2.70%
Constant prepayment rate	9.80%	9.80%
Loss recovery	62.60%	62.30%
Level 3 [Member] | Recurring basis [Member]
Summary of the significant unobservable inputs
Other assets	2,017	1,936
Debt	$ 5,466	$ 4,804
Scenario, previously reported [Member] | Other assets [Member] | Minimum [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Expected rental value (per square foot)		5
Scenario, previously reported [Member] | Other assets [Member] | Maximum [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Expected rental value (per square foot)		373
Scenario, previously reported [Member] | Other assets [Member] | Weighted average [Member] | Discounted cash flow/market comparables [Member]
Summary of the significant unobservable inputs
Expected rental value (per square foot)		33

[1] The previously reported range and weighted average for the expected rental value was $5-$373 per square foot and $33 per square foot, respectively. These inputs have been revised in this disclosure only and the change does not impact the fair value of other assets.