Quarterly report pursuant to Section 13 or 15(d)

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

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Derivatives - Derivatives Designated as Accounting Hedges - Cash Flow and Net Investment Hedges (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
In Text Details [Abstract]        
Net Losses in AOCI $ 960      
Net Losses in AOCI, after tax 600      
Cash Flow Hedging [Member]
        
Cash Flow Hedges And Net Investment Hedges [Abstract]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives (192) (166) (19) (125)
Gains (Losses) in Income Reclassified from Accumulated OCI (204) (186) (335) (421)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing    [1] (1) [1]   (2) [1]
Interest Rate Risk on Variable Rate Portfolios [Member] | Cash Flow Hedging [Member]
        
Cash Flow Hedges And Net Investment Hedges [Abstract]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives 28 (276) 45 (290)
Gains (Losses) in Income Reclassified from Accumulated OCI (279) (255) (560) (530)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing    [1] (1) [1]   (2) [1]
Price risk on restricted stock awards [Member] | Cash Flow Hedging [Member]
        
Cash Flow Hedges And Net Investment Hedges [Abstract]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives (220) 110 (64) 165
Gains (Losses) in Income Reclassified from Accumulated OCI 75 69 225 109
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing    [1]    [1]    
Foreign Exchange Risk [Member] | Net Investment Hedging [Member]
        
Cash Flow Hedges And Net Investment Hedges [Abstract]        
Gains (Losses) Recognized in Accumulated OCI on Derivatives (797) 804 (978) 2,480
Gains (Losses) in Income Reclassified from Accumulated OCI   3 (2) (91)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing $ (118) [1] $ (37) [1] $ (176) [1] $ (72) [1]
[1] Amounts related to derivatives designated as cash flow hedges represent hedge ineffectiveness and amounts related to net investment hedges represent amounts excluded from effectiveness testing.