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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 31, 2024
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Value | $ 787 | $ 738
Accumulated Amortization | 414 | 327
Net Carrying Value | 373 | 411
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Intangible assets, gross | 977 | 928
Net Carrying Value | 563 | 601
Trade name |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Unamortizable intangible assets | 190 | 190
Customer contracts and related customer relationships |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Value | 619 | 592
Accumulated Amortization | 305 | 238
Net Carrying Value | 314 | 354
Software |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Value | 168 | 146
Accumulated Amortization | 109 | 89
Net Carrying Value | $ 59 | $ 57

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