Consolidated Investment Entities (Details 3) (Consolidated Investment Entities, USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Summary of the significant unobservable inputs
Debt	$ 5,225	$ 4,804
Other assets | Minimum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	4.60%	4.40%
Expected rental value (per square foot)	5	5
Other assets | Maximum | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	11.90%	12.40%
Expected rental value (per square foot)	374	373
Other assets | Weighted Average | Discounted cash flow/market comparables
Summary of the significant unobservable inputs
Equivalent yield (as a percent)	7.20%	7.40%
Expected rental value (per square foot)	33	33
Debt | Minimum | Discounted Cash Flow Technique [Member]
Summary of the significant unobservable inputs
Fair Value Inputs, Probability of Default	2.50%	2.50%
Discount rate (as a percent)	1.40%	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
Fair Value Inputs, Probability of Default	2.50%	2.50%
Discount rate (as a percent)	7.50%	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	2.50%	2.50%
Discount rate (as a percent)	2.60%	2.70%
Constant prepayment rate (as a percent)	9.80%	9.80%
Loss recovery (as a percent)	62.60%	62.30%
Fair Value, Inputs, Level 3 [Member] | Recurring
Summary of the significant unobservable inputs
Other assets	1,993	1,936
Debt	$ 5,225	$ 4,804