Summary of Significant Accounting Policies Fee and Other Income (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gain Contingencies [Line Items]
Fee and other income	$ 556,000,000	$ 383,000,000	$ 864,000,000	$ 4,738,000,000
Private Label Securities Settlements [Member]
Gain Contingencies [Line Items]
Fee and other income			$ 0	$ 4,200,000,000