Investment in Operating Leases - Narrative (Detail) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Leases [Abstract] | |||
| Early termination loss on operating leases | $ 136,000,000 | $ 100,000,000 | $ 38,000,000 |
| Net realized losses on operating losses | 118,000,000 | 82,000,000 | 43,000,000 |
| Provision for credit losses on operating leases | 28,000,000 | 16,000,000 | $ 4,000,000 |
| Impairment losses | $ 0 | $ 0 | |