Consolidated Investment Entities (Fair Value Unobservable Inputs) (Details 3) (Consolidated Investment Entities, USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Summary of the significant unobservable inputs
Debt	$ 5,511	$ 4,804
Other assets | Minimum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	3.70%	4.40%
Expected rental value (per square foot)	3	3	[1]
Other assets | Maximum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	12.50%	12.40%
Expected rental value (per square foot)	108	165	[1]
Other assets | Weighted Average | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	6.80%	7.40%
Expected rental value (per square foot)	35	27	[1]
Debt | Discounted Cash Flow Technique [Member]
Summary of the significant unobservable inputs
Fair Value Inputs, Probability of Default	2.50%	2.50%
Debt | Minimum | Discounted Cash Flow Technique [Member]
Summary of the significant unobservable inputs
Discount rate (as a percent)	1.30%	1.50%
Constant prepayment rate (as a percent)	5.00%	5.00%
Loss recovery (as a percent)	36.40%	36.40%
Debt | Maximum | Discounted Cash Flow Technique [Member]
Summary of the significant unobservable inputs
Discount rate (as a percent)	7.00%	8.30%
Constant prepayment rate (as a percent)	10.00%	10.00%
Loss recovery (as a percent)	63.60%	63.60%
Debt | Weighted Average | Discounted Cash Flow Technique [Member]
Summary of the significant unobservable inputs
Fair Value Inputs, Probability of Default
Discount rate (as a percent)	2.50%	2.70%
Constant prepayment rate (as a percent)	9.80%	9.80%
Loss recovery (as a percent)	62.70%	62.30%
Fair Value, Inputs, Level 3 [Member] | Recurring
Summary of the significant unobservable inputs
Other assets	2,389	1,936
Debt	5,511	4,804
Scenario, Previously Reported [Member] | Other assets | Minimum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Expected rental value (per square foot)		5
Scenario, Previously Reported [Member] | Other assets | Maximum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Expected rental value (per square foot)		373
Scenario, Previously Reported [Member] | Other assets | Weighted Average | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Expected rental value (per square foot)		33
Real Estate Properties [Domain] | Fair Value, Inputs, Level 3 [Member] | Recurring
Summary of the significant unobservable inputs
Other assets	$ 2,378

[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.