Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v3.3.1.900
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) - Nonrecurring - Level 3 - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Market Comparables | Minimum    
Fair Value Inputs [Abstract]    
OREO discount 7.00% 0.00%
Cost to sell 8.00% 7.00%
Market Comparables | Maximum    
Fair Value Inputs [Abstract]    
OREO discount 55.00% 28.00%
Cost to sell 45.00% 14.00%
Instruments backed by residential real estate assets    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Assets, fair value $ 2,739 $ 4,636
Instruments backed by residential real estate assets | Market Comparables | Weighted Average    
Fair Value Inputs [Abstract]    
OREO discount 20.00% 8.00%
Cost to sell 10.00% 8.00%