Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Derivatives Designated as Cash Flow and Net Investment Hedges (Details)

v3.8.0.1
Derivatives - Derivatives Designated as Cash Flow and Net Investment Hedges (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Cash flow hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives $ 18 $ 77 $ 79 $ (64)
Gains (Losses) in Income Reclassified from Accumulated OCI (22) (127) (171) (508)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing (1) (4) 4 2
Interest rate risk on variable-rate portfolios | Cash flow hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives 11 (8) 38 50
Gains (Losses) in Income Reclassified from Accumulated OCI (54) (119) (274) (447)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing (1) (4) 4 2
Price risk on restricted stock awards | Cash flow hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives 7 85 41 (114)
Gains (Losses) in Income Reclassified from Accumulated OCI 32 (8) 103 (61)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing 0 0 0 0
Foreign exchange risk | Net investment hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives (427) 214 (1,541) 173
Gains (Losses) in Income Reclassified from Accumulated OCI (3) 2 1,811 3
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing $ (33) $ (68) $ (82) $ (234)