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Loans and Allowance for Credit Losses Textual (Details) (USD $)
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3 Months Ended |
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Mar. 31, 2013
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Mar. 31, 2012
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Dec. 31, 2012
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Unearned income, net deferred loan fees and unamortized discount and premium |
$ 7,000,000,000 |
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$ 7,400,000,000 |
| Loan charge-offs |
1,861,000,000 |
2,880,000,000 |
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| Allowance for Credit Losses, Purchased Credit-Impaired |
80,000,000 |
245,000,000 |
117,000,000 |
| Financing Receivable, Recorded Investment, nonaccrual status |
19,526,000,000 |
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20,486,000,000 |
| 90 days or more past due and still accruing |
23,082,000,000 |
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23,245,000,000 |
| Impaired loans, Recorded Investment |
30,387,000,000 |
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30,012,000,000 |
| Unpaid principal balance |
36,598,000,000 |
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36,255,000,000 |
| Total unfunded loan commitments on troubled debt restructurings |
409,000,000 |
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421,000,000 |
| Financing Receivable Modifications, principal forgiven |
134,000,000 |
92,000,000 |
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| Other interest rate concessions, primary modification type |
2,466,000,000 |
1,829,000,000 |
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| High Value Properties, Threshold |
1,000,000 |
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Home Affordable Modification Program [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
395,000,000 |
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402,000,000 |
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Second Lien Modification Program [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
47,000,000 |
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45,000,000 |
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Proprietary Program [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
281,000,000 |
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258,000,000 |
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Purchased Credit-Impaired Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
5,800,000,000 |
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6,000,000,000 |
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Trial modifications [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
723,000,000 |
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705,000,000 |
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Trial modifications [Member] | Financing Receivable Accruing [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
306,000,000 |
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429,000,000 |
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Trial modifications [Member] | Financing Receivable Nonaccruing [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Impaired loans, Recorded Investment |
417,000,000 |
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276,000,000 |
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Commercial and Industrial Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
181,000,000 |
359,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
1,193,000,000 |
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1,422,000,000 |
| Impaired loans, Recorded Investment |
1,821,000,000 |
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2,086,000,000 |
| Unpaid principal balance |
2,851,000,000 |
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3,331,000,000 |
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Commercial and Industrial Loans [Member] | Purchased Credit-Impaired Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
2,000,000 |
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23,000,000 |
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Commercial Real Estate Mortgage [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
60,000,000 |
82,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
3,098,000,000 |
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3,322,000,000 |
| Impaired loans, Recorded Investment |
4,371,000,000 |
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4,673,000,000 |
| Unpaid principal balance |
5,567,000,000 |
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5,766,000,000 |
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Commercial Real Estate Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
79,000,000 |
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140,000,000 |
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Commercial Real Estate Construction [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
5,000,000 |
80,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
870,000,000 |
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1,003,000,000 |
| Impaired loans, Recorded Investment |
1,181,000,000 |
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1,345,000,000 |
| Unpaid principal balance |
1,701,000,000 |
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1,975,000,000 |
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Commercial Real Estate Construction [Member] | Purchased Credit-Impaired Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
131,000,000 |
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127,000,000 |
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Commercial Real Estate Mortgage and Construction Loans [Member] | Criticized [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loans, excluding Purchased Credit Impaired Loans |
18,600,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
4,000,000,000 |
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Total Commercial [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
260,000,000 |
558,000,000 |
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| Allowance for Credit Losses, Purchased Credit-Impaired |
53,000,000 |
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88,000,000 |
| Financing Receivable, Recorded Investment, nonaccrual status |
5,242,000,000 |
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5,824,000,000 |
| Impaired loans, Recorded Investment |
7,447,000,000 |
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8,186,000,000 |
| Unpaid principal balance |
10,273,000,000 |
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11,235,000,000 |
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Total Commercial [Member] | Loans held for sale [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Financing Receivable, Recorded Investment, nonaccrual status |
15,000,000 |
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16,000,000 |
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Total Commercial [Member] | Purchased Credit-Impaired Loans [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
384,000,000 |
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457,000,000 |
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Total Consumer [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
1,601,000,000 |
2,322,000,000 |
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| Allowance for Credit Losses, Purchased Credit-Impaired |
27,000,000 |
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29,000,000 |
| Financing Receivable, Recorded Investment, nonaccrual status |
14,284,000,000 |
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14,662,000,000 |
| Financing Receivable, Recorded Investment, equal to or greater than 90 days past due |
9,400,000,000 |
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10,300,000,000 |
| 90 days or more past due and still accruing |
1,100,000,000 |
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1,100,000,000 |
| Impaired loans, Recorded Investment |
22,940,000,000 |
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21,826,000,000 |
| Unpaid principal balance |
26,325,000,000 |
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25,020,000,000 |
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Total Consumer [Member] | Loans Discharged in Bankruptcy [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Other interest rate concessions, primary modification type |
1,300,000,000 |
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Real estate 1-4 family first mortgage [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
475,000,000 |
828,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
11,320,000,000 |
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11,455,000,000 |
| Financing Receivables equal to or greater than 180 days past due, Percentage of Portfolio |
2.80% |
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3.00% |
| Impaired loans, Recorded Investment |
19,610,000,000 |
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18,472,000,000 |
| Unpaid principal balance |
22,547,000,000 |
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21,293,000,000 |
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Real estate 1-4 family first mortgage [Member] | Mortgages held for sale [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Financing Receivable, Recorded Investment, nonaccrual status |
368,000,000 |
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336,000,000 |
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Real estate 1-4 family junior lien mortgage [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
514,000,000 |
820,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
2,712,000,000 |
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2,922,000,000 |
| Impaired loans, Recorded Investment |
2,523,000,000 |
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2,483,000,000 |
| Unpaid principal balance |
2,911,000,000 |
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2,855,000,000 |
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Automobile [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
164,000,000 |
179,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
220,000,000 |
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245,000,000 |
| Impaired loans, Recorded Investment |
279,000,000 |
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314,000,000 |
| Unpaid principal balance |
331,000,000 |
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314,000,000 |
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FHA Insured/VA Guaranteed [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Financing Receivable, certain purchases net of certain transfers to held for sale |
2,000,000,000 |
3,500,000,000 |
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| 90 days or more past due and still accruing |
20,745,000,000 |
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20,745,000,000 |
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FHA Insured/VA Guaranteed [Member] | Financing Receivable 90 Days Or More Past Due [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Government insured/guaranteed loans |
20,200,000,000 |
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20,200,000,000 |
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FHA Insured, VA Or FFELP Guaranteed [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
21,700,000,000 |
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21,800,000,000 |
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Student Loans under FFELP [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| 90 days or more past due and still accruing |
977,000,000 |
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1,065,000,000 |
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Student Loans under FFELP [Member] | Financing Receivable 90 Days Or More Past Due [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Government insured/guaranteed loans |
1,000,000,000 |
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1,100,000,000 |
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Lease Financing [Member]
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| Accounts Notes Loans And Financing Receivable (Textual) [Abstract] |
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| Loan charge-offs |
3,000,000 |
8,000,000 |
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| Financing Receivable, Recorded Investment, nonaccrual status |
25,000,000 |
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27,000,000 |
| Impaired loans, Recorded Investment |
35,000,000 |
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39,000,000 |
| Unpaid principal balance |
$ 50,000,000 |
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$ 54,000,000 |