Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value (Details)

v3.8.0.1
Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale, measured at fair value $ 3,091   $ 2,156
Loans and leases, measured at fair value 5,989   5,710
Other assets, measured at fair value 20,575   22,581
Nonrecurring      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Gains (Losses) on loans held-for-sale (2) $ (4)  
Gains (Losses) on loans and leases (98) (123)  
Gains (Losses) on foreclosed properties (17) (25)  
Gains (Losses) on other assets (7) (86)  
Loss on loans and leases written down to zero 45 46  
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Foreclosed properties, measured at fair value 680   $ 1,100
Nonrecurring | Level 2      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale, measured at fair value 13 69  
Loans and leases, measured at fair value 0 0  
Foreclosed properties, measured at fair value 0 0  
Other assets, measured at fair value 47 91  
Nonrecurring | Level 3      
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis      
Loans held-for-sale, measured at fair value 0 18  
Loans and leases, measured at fair value 273 438  
Foreclosed properties, measured at fair value 61 82  
Other assets, measured at fair value $ 0 $ 0