Receivables Receivables - Contractual Maturities by Repricing Characteristic (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Receivable, Contractual Obligation, Contractual Maturities by Repricing Characteristic [Abstract]
Receivables at predetermined interest rates, over 1 but within 5 years	$ 394
Receivables at predetermined interest rates, over 5 years	30,854
Receivables at floating or adjustable rates, over 1 but within 5 years	46
Receivables at floating or adjustable rates, over 5 years	1,446
Total, over 1 but within 5 years	440
Total, over 5 years	$ 32,300

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Receivable, Contractual Obligation, Due in One to Five Years

No definition available.

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Receivable, Contractual Obligation, Due in One to Five Years, at Floating or Adjustable Rates

No definition available.

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Receivable, Contractual Obligation, Due in One to Five Years, at Predetermined Interest Rates

No definition available.

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Receivable, Contractual Obligation, Due in Over Five Years

No definition available.

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Receivable, Contractual Obligation, Due in Over Five Years, at Floating or Adjustable Rates

No definition available.

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Receivable, Contractual Obligation, Due in Over Five Years, at Predetermined Interest Rates

No definition available.

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