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Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Assets    
Loans Held-for-sale, Fair Value Disclosure $ 2,207 [1] $ 2,141 [1]
Fair Value, Measurements, Recurring [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 6,316 6,279
Loans Held-for-sale, Fair Value Disclosure 2,207 2,141
Loans, Held for Investment, Fair Value Disclosure 413 433
Other intangible assets 1,070 921
Other assets 391 [2] 554 [2]
Liabilities    
Trading liabilities 1,554 1,806
Brokered deposits 1,005 1,018
Long-term debt 2,000 1,997
Other liabilities 71 [2],[3] 84 [2],[4]
Fair Value, Measurements, Recurring [Member] | US Treasury Securities
    
Liabilities    
Trading liabilities   569
Fair Value, Measurements, Recurring [Member] | Corporate And Other Debt Securities [Member]
    
Liabilities    
Trading liabilities   77
Fair Value, Measurements, Recurring [Member] | Residential Mortgage, Loans Held For Sale [Member]
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 1,881 1,826
Fair Value, Measurements, Recurring [Member] | Corporate and Other
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 326 315
Fair Value, Measurements, Recurring [Member] | Fair Value Adjustments on Hedges and Derivative Contracts [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure (827) [5] (1,030) [6]
Liabilities    
Trading liabilities (1,225) [5] (1,170) [6]
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member]
    
Assets    
Securities available for sale 27,323 28,117
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | US Treasury Securities
    
Assets    
Securities available for sale 231 694
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | US Government Agencies Debt Securities
    
Assets    
Securities available for sale 1,747 1,932
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Securities available for sale 419 454
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Securities available for sale 20,967 21,223
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Securities available for sale 216 221
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Securities available for sale 43 50
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Asset-backed Securities [Member]
    
Assets    
Securities available for sale 401 464
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Securities available for sale 46 51
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Equity Securities, Coca Cola
    
Assets    
Securities available for sale 2,220 2,099
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Equity Securities, Other [Member]
    
Assets    
Securities available for sale 1,033 [7] 929 [8]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 393 541
Loans Held-for-sale, Fair Value Disclosure 0 0
Loans, Held for Investment, Fair Value Disclosure 0 0
Other intangible assets 0 0
Other assets 3 [2] 7 [2]
Liabilities    
Trading liabilities 480 780
Brokered deposits 0 0
Long-term debt 0 0
Other liabilities 1 [2],[3] 1 [2],[4]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 162 144
Liabilities    
Trading liabilities 446 569
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Paper
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 92 91
Liabilities    
Trading liabilities 34 37
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Assets
    
Assets    
Trading Account Assets, Fair Value Disclosure 139 306
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Trading Loans
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Mortgage, Loans Held For Sale [Member]
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate and Other
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member]
    
Liabilities    
Trading liabilities 0 174
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
    
Assets    
Securities available for sale 2,653 2,981
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | US Treasury Securities
    
Assets    
Securities available for sale 231 694
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | US Government Agencies Debt Securities
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Asset-backed Securities [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Equity Securities, Coca Cola
    
Assets    
Securities available for sale 2,220 2,099
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | Equity Securities, Other [Member]
    
Assets    
Securities available for sale 202 [7] 188 [6]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 6,701 6,719
Loans Held-for-sale, Fair Value Disclosure 2,203 2,140
Loans, Held for Investment, Fair Value Disclosure 0 0
Other intangible assets 0 0
Other assets 292 [2] 463 [2]
Liabilities    
Trading liabilities 2,053 2,007
Brokered deposits 1,005 1,018
Long-term debt 2,000 1,997
Other liabilities 65 [2],[3] 61 [2],[4]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 430 478
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 47 54
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Trading Account Assets, Fair Value Disclosure 461 412
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 2 2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 35 32
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 501 344
Liabilities    
Trading liabilities 132 77
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper
    
Assets    
Trading Account Assets, Fair Value Disclosure 190 229
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets
    
Assets    
Trading Account Assets, Fair Value Disclosure 2,754 3,138
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Trading Loans
    
Assets    
Trading Account Assets, Fair Value Disclosure 2,281 2,030
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage, Loans Held For Sale [Member]
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 1,877 1,825
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate and Other
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 326 315
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member]
    
Liabilities    
Trading liabilities 1,921 1,930
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
    
Assets    
Securities available for sale 23,544 24,095
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | US Treasury Securities
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | US Government Agencies Debt Securities
    
Assets    
Securities available for sale 1,747 1,932
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Securities available for sale 362 396
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Securities available for sale 20,967 21,223
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Securities available for sale 43 50
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Asset-backed Securities [Member]
    
Assets    
Securities available for sale 384 448
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Securities available for sale 41 46
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Equity Securities, Coca Cola
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Equity Securities, Other [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 49 49
Loans Held-for-sale, Fair Value Disclosure 4 1
Loans, Held for Investment, Fair Value Disclosure 413 433
Other intangible assets 1,070 921
Other assets 96 [2] 84 [2]
Liabilities    
Trading liabilities 246 189
Brokered deposits 0 0
Long-term debt 0 0
Other liabilities 5 [2],[3] 22 [2],[4]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 1 1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 43 43
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 5 5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Paper
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Liabilities    
Trading liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Assets
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Trading Loans
    
Assets    
Trading Account Assets, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage, Loans Held For Sale [Member]
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 4 1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate and Other
    
Assets    
Loans Held-for-sale, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member]
    
Liabilities    
Trading liabilities 246 189
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
    
Assets    
Securities available for sale 1,126 1,041
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | US Treasury Securities
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | US Government Agencies Debt Securities
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Securities available for sale 57 58
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Securities available for sale 216 221
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Asset-backed Securities [Member]
    
Assets    
Securities available for sale 17 16
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Securities available for sale 5 5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Equity Securities, Coca Cola
    
Assets    
Securities available for sale 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Equity Securities, Other [Member]
    
Assets    
Securities available for sale 831 [7] 741 [8]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Member]
    
Assets    
Securities available for sale 830 [7] 740 [6]
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 7,143 7,309
Liabilities    
Trading liabilities 2,779 2,976
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | US Treasury Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 162 144
Liabilities    
Trading liabilities 446  
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | US Government Agencies Debt Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 430 478
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | US States and Political Subdivisions Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 47 54
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
    
Assets    
Trading Account Assets, Fair Value Disclosure 461 412
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 1 1
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Collateralized Debt Obligations [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 45 45
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Asset-backed Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 40 37
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate And Other Debt Securities [Member]
    
Assets    
Trading Account Assets, Fair Value Disclosure 501 344
Liabilities    
Trading liabilities 132  
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial Paper
    
Assets    
Trading Account Assets, Fair Value Disclosure 190 229
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Equity Securities
    
Assets    
Trading Account Assets, Fair Value Disclosure 92 91
Liabilities    
Trading liabilities 34 37
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Derivative Financial Instruments, Assets
    
Assets    
Trading Account Assets, Fair Value Disclosure 2,893 3,444
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Trading Loans
    
Assets    
Trading Account Assets, Fair Value Disclosure 2,281 2,030
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Derivative Financial Instruments, Liabilities [Member]
    
Liabilities    
Trading liabilities $ 2,167 $ 2,293
[1] Includes loans held for sale, at fair value, of consolidated VIEs326 315
[2] These amounts include IRLCs and derivative financial instruments entered into by the Mortgage line of business to hedge its interest rate risk.
[3] hese amounts include the derivative associated with the Company's sale of Visa shares during the year ended December 31, 2009.
[4] These amounts include the derivative associated with the Company's sale of Visa shares during the year ended December 31, 2009.
[5] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets as of March 31, 2012.
[6] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets as of December 31, 2011.
[7] Includes at cost, $432 million of FHLB of Atlanta stock, $398 million of Federal Reserve Bank stock, and $202 million in mutual fund investments.
[8] Includes at cost, $342 million of FHLB of Atlanta stock, $398 million of Federal Reserve Bank stock, and $187 million in mutual fund investments.