Annual report pursuant to Section 13 and 15(d)

Derivatives - Derivatives Designated as Accounting Hedges - Cash Flow Hedges (Details)

v2.4.0.6
Derivatives - Derivatives Designated as Accounting Hedges - Cash Flow Hedges (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
In Text Details [Abstract]      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ 981    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax (618)    
Net Investment Hedge Related to Foreign Exchange Risk Excluded From Accumulated Other Comprehensive Income 7 82 192
Cash Flow Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives 430 (2,490) (1,755)
Gains (losses) in Income Reclassified from Accumulated OCI (1,035) (1,617) (644)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing   (11) [1] (19) [1]
Interest Rate Risk on Variable Rate Portfolios [Member] | Cash Flow Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives 10 (2,079) (1,876)
Gains (losses) in Income Reclassified from Accumulated OCI (957) (1,392) (410)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing   (8) [1] (30) [1]
Commodity Contract [Member] | Cash Flow Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives   (3) 32
Gains (losses) in Income Reclassified from Accumulated OCI   6 25
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing   (3) [1] 11 [1]
Price risk on restricted stock awards [Member] | Cash Flow Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives 420 (408) (97)
Gains (losses) in Income Reclassified from Accumulated OCI (78) (231) (33)
Price Risk On Equity Investments Included In Available For Sale Securities [Member] | Cash Flow Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives     186
Gains (losses) in Income Reclassified from Accumulated OCI     (226)
Foreign Exchange Risk [Member] | Net Investment Hedging [Member]
     
Cash Flow Hedges And Net Investment Hedges [Abstract]      
Gain (losses) Recognized in Accumulated OCI on Derivatives (771) 1,055 (482)
Gains (losses) in Income Reclassified from Accumulated OCI (26) 384  
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing $ (269) [1] $ (572) [1] $ (315) [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.