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Goodwill and Intangible Assets - Amortization Expense (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |||||
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Mar. 31, 2014
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Mar. 31, 2013
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| Finite-Lived Intangible Assets [Line Items] | ||||||
| Amortization of intangibles | $ 239 | [1] | $ 276 | [1] | ||
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Purchased credit card and Affinity relationships [Member]
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| Finite-Lived Intangible Assets [Line Items] | ||||||
| Amortization of intangibles | 105 | 119 | ||||
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Core Deposits [Member]
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| Finite-Lived Intangible Assets [Line Items] | ||||||
| Amortization of intangibles | 36 | 75 | ||||
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Customer Relationships [Member]
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| Finite-Lived Intangible Assets [Line Items] | ||||||
| Amortization of intangibles | 91 | 70 | ||||
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Other Intangible Assets [Member]
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| Finite-Lived Intangible Assets [Line Items] | ||||||
| Amortization of intangibles | $ 7 | $ 12 | ||||
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