Fair Value Measurement and Fair Value of Financial Instruments (Details 5) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 FDIC clawback liability Minimum Discounted cash flow	Jun. 30, 2014 FDIC clawback liability Maximum Discounted cash flow	Jun. 30, 2014 FDIC clawback liability Weighted Average Discounted cash flow	Jun. 30, 2014 Level 3 FDIC clawback liability
Significant unobservable inputs, Level 3 assets
Probability of default (as a percent)			0.10%	100.00%	56.20%
Loss severity (as a percent)			0.00%	100.00%	40.00%
Other liabilities	$ 1,666	$ 1,675				$ 102