Outstanding Loans and Leases - Home Loans Impaired Loans (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2013
Home Loans [Member]
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Jun. 30, 2012
Home Loans [Member]
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Jun. 30, 2013
Home Loans [Member]
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Jun. 30, 2012
Home Loans [Member]
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Dec. 31, 2012
Home Loans [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
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Dec. 31, 2012
Residential Mortgage [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
Financing Receivable With Related Allowance [Member]
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Dec. 31, 2012
Residential Mortgage [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2013
Residential Mortgage [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2012
Residential Mortgage [Member]
Financing Receivable Without Related Allowance [Member]
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Dec. 31, 2012
Residential Mortgage [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2013
Home Equity [Member]
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Jun. 30, 2012
Home Equity [Member]
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Jun. 30, 2013
Home Equity [Member]
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Jun. 30, 2012
Home Equity [Member]
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Dec. 31, 2012
Home Equity [Member]
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Jun. 30, 2013
Home Equity [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2012
Home Equity [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2013
Home Equity [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2012
Home Equity [Member]
Financing Receivable With Related Allowance [Member]
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Dec. 31, 2012
Home Equity [Member]
Financing Receivable With Related Allowance [Member]
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Jun. 30, 2013
Home Equity [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2012
Home Equity [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2013
Home Equity [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2012
Home Equity [Member]
Financing Receivable Without Related Allowance [Member]
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Dec. 31, 2012
Home Equity [Member]
Financing Receivable Without Related Allowance [Member]
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Jun. 30, 2013
Additional Troubled Debt Restructurings Recognized [Member]
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Dec. 31, 2012
Additional Troubled Debt Restructurings Recognized [Member]
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Dec. 31, 2011
Additional Troubled Debt Restructurings Recognized [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Home Loans [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Home Loans [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Residential Mortgage [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Residential Mortgage [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Home Equity [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
Home Equity [Member]
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Jun. 30, 2013
Fully Insured Loans [Member]
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Financing Receivable, Impaired [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Troubled Debt Restructurings, Non-performing With No Change in Repayment Terms At Time of Discharge | $ 2,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Troubled Debt Restructurings Carrying Value | 3,687,000,000 | [1] | 1,502,000,000 | [1] | 8,104,000,000 | [1] | 2,945,000,000 | 3,518,000,000 | [1] | 1,420,000,000 | [1] | 7,798,000,000 | [1] | 2,776,000,000 | 169,000,000 | [1] | 82,000,000 | [1] | 306,000,000 | [1] | 169,000,000 | 4,000,000,000 | 489,000,000 | [2] | 1,082,000,000 | [3] | 383,000,000 | [2] | 908,000,000 | [3] | 106,000,000 | [2] | 174,000,000 | [3] | 2,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Troubled Debt Restructurings Carrying Value Loans Discharged, Percent | 14.00% | 36.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Toubled Debt Restructuring Carrying Value, Cumulative to Date Percentage | 50.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Real Estate Acquired Through Foreclosure | 508,000,000 | 508,000,000 | 650,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unpaid Principal Balance | 38,049,000,000 | 38,049,000,000 | 34,449,000,000 | 15,697,000,000 | 15,697,000,000 | 14,223,000,000 | 22,352,000,000 | 22,352,000,000 | 20,226,000,000 | 4,065,000,000 | 4,065,000,000 | 3,880,000,000 | 1,107,000,000 | 1,107,000,000 | 1,256,000,000 | 2,958,000,000 | 2,958,000,000 | 2,624,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Carrying Value | 31,632,000,000 | 31,632,000,000 | 28,125,000,000 | 14,829,000,000 | 14,829,000,000 | 13,158,000,000 | 16,803,000,000 | 16,803,000,000 | 14,967,000,000 | 2,161,000,000 | 2,161,000,000 | 2,125,000,000 | 917,000,000 | 917,000,000 | 1,022,000,000 | 1,244,000,000 | 1,244,000,000 | 1,103,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Allowance | 1,367,000,000 | 1,367,000,000 | 1,252,000,000 | 1,367,000,000 | 1,367,000,000 | 1,252,000,000 | 352,000,000 | 352,000,000 | 448,000,000 | 352,000,000 | 352,000,000 | 448,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Average Carrying Value | 31,547,000,000 | 20,367,000,000 | 30,670,000,000 | 20,122,000,000 | 14,735,000,000 | 11,474,000,000 | 14,317,000,000 | 11,324,000,000 | 16,812,000,000 | 8,893,000,000 | 16,353,000,000 | 8,798,000,000 | 2,140,000,000 | 1,690,000,000 | 2,131,000,000 | 1,726,000,000 | 936,000,000 | 1,205,000,000 | 962,000,000 | 1,230,000,000 | 1,204,000,000 | 485,000,000 | 1,169,000,000 | 496,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Interest Income Recognized | $ 264,000,000 | [4] | $ 184,000,000 | [4] | $ 562,000,000 | [4] | $ 359,000,000 | [4] | $ 124,000,000 | [4] | $ 108,000,000 | [4] | $ 278,000,000 | [4] | $ 208,000,000 | [4] | $ 140,000,000 | [4] | $ 76,000,000 | [4] | $ 284,000,000 | [4] | $ 151,000,000 | [4] | $ 30,000,000 | [4] | $ 23,000,000 | [4] | $ 58,000,000 | [4] | $ 41,000,000 | [4] | $ 11,000,000 | [4] | $ 13,000,000 | [4] | $ 22,000,000 | [4] | $ 22,000,000 | [4] | $ 19,000,000 | [4] | $ 10,000,000 | [4] | $ 36,000,000 | [4] | $ 19,000,000 | [4] | |||||||||||||||||||||||||||||||||||||||
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