Sale Of Receivables (Finance Receivables Repurchased) (Details) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Other Assets [Abstract] | |||||
| Fair value of repurchased receivables | $ 1,418 | $ 1,480 | $ 1,699 | ||
| Carrying value of deferred purchase price | 1,350 | 1,393 | 1,524 | ||
| Gain on repurchases | [1] | $ 68 | $ 87 | $ 175 | |
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