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Receivables - Schedule of DFP (Details) - USD ($) | 9 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Purchasers |  |
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward] |  |
Beginning balance |  | $ 574,000,000
Transfers of receivables |  | 1,214,000,000
Collections |  | (1,265,000,000)
Change in funding availability |  | 2,000,000
Facility amendments |  | (525,000,000)
Ending balance | $ 0 | $ 0
DE Purchasers |  |
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward] |  |
Beginning balance | 103,000,000 |
Transfers of receivables | 417,000,000 |
Collections | (420,000,000) |
Change in funding availability | 2,000,000 |
Facility amendments | (102,000,000) |
Ending balance | $ 0 |

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