Summary of Significant Accounting Principles - Principles of Consolidation and Basis of Presentation (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Loans and leases | $ 9,214 | |
| Goodwill | 775 | $ 0 |
| Available-for-sale securities of business held for sale | 619 | |
| Disposal Group, Held-for-sale, Not Discontinued Operations | International Consumer Credit Card Business | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Loans and leases | 9,200 | |
| Allowance for loan and lease losses | 243 | |
| Goodwill | 775 | |
| Available-for-sale securities of business held for sale | 619 | |
| All other assets | $ 305 |
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- Definition Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Allowance No definition available.
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- Definition Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net of Deferred Income No definition available.
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- Definition Disposal Group, Including Discontinued Operation, Available-for-sale Securities No definition available.
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- Definition Amount classified as goodwill attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount classified as other assets attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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