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Loan Receivables (Schedule of Loans That Entered a Modification Program During the Period) (Details) (USD $)
In Millions, unless otherwise specified
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3 Months Ended |
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Mar. 31, 2015
accounts
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Mar. 31, 2014
accounts
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| Internal Programs [Member] | Credit Card Loans [Member] |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Accounts that entered a loan modification program during the period, number of accounts (in accounts) |
13,243 |
12,436 |
| Accounts that entered a loan modification program during the period, balances |
$ 86 |
$ 81 |
| External Programs [Member] | Credit Card Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts that entered a loan modification program during the period, number of accounts (in accounts) |
7,617 |
8,431 |
| Accounts that entered a loan modification program during the period, balances |
39 |
44 |
| Internal And External Loan Modification Programs [Member] | Total Other Loans [Member] | Personal Loans [Member] |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts that entered a loan modification program during the period, number of accounts (in accounts) |
986 |
712 |
| Accounts that entered a loan modification program during the period, balances |
12 |
8 |
| Entity Loan Modification Program [Member] | Total Other Loans [Member] | Private Student Loans [Member] |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts that entered a loan modification program during the period, number of accounts (in accounts) |
469 |
307 |
| Accounts that entered a loan modification program during the period, balances |
$ 7 |
$ 4 |