Finance Receivables - Summary of Activity in Allowance for Credit Losses of Finance Receivables (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Finance receivables, net: | |||
| Beginning balance | $ 353 | $ 253 | $ 211 |
| Provision | 306 | 301 | 146 |
| Charge-offs | (406) | (293) | (193) |
| Recoveries | 144 | 92 | 90 |
| Effect of translation adjustment | (1) | 0 | (1) |
| Ending balance | 396 | 353 | 253 |
| Retail | |||
| Finance receivables, net: | |||
| Beginning balance | 345 | 248 | 206 |
| Provision | 305 | 298 | 146 |
| Charge-offs | (406) | (293) | (193) |
| Recoveries | 144 | 92 | 90 |
| Effect of translation adjustment | (1) | 0 | (1) |
| Ending balance | 387 | 345 | 248 |
| Dealer | |||
| Finance receivables, net: | |||
| Beginning balance | 8 | 5 | 5 |
| Provision | 1 | 3 | 0 |
| Charge-offs | 0 | 0 | 0 |
| Recoveries | 0 | 0 | 0 |
| Effect of translation adjustment | 0 | 0 | 0 |
| Ending balance | $ 9 | $ 8 | $ 5 |