Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Derivatives - Derivatives Designated as Accounting Hedges - Cash Flow and Net Investment Hedges (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Cash flow hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (Losses) Recognized in Accumulated OCI on Derivatives $ (9) $ (159)
Gains (Losses) in Income Reclassified from Accumulated OCI (70) (198)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing 3 6
Interest rate risk on variable-rate portfolios | Cash flow hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (Losses) Recognized in Accumulated OCI on Derivatives (37) 39
Gains (Losses) in Income Reclassified from Accumulated OCI (112) (164)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing 3 6
Price risk on restricted stock awards | Cash flow hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (Losses) Recognized in Accumulated OCI on Derivatives 28 (198)
Gains (Losses) in Income Reclassified from Accumulated OCI 42 (34)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing 0 0
Foreign exchange risk | Net investment hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (Losses) Recognized in Accumulated OCI on Derivatives (389) (633)
Gains (Losses) in Income Reclassified from Accumulated OCI (130) 1
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing $ (15) $ (143)