Acquisitions, Goodwill, and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Mar. 31, 2026 |
|---|---|---|
| Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] | ||
| Gross Carrying Value | $ 1,229 | $ 821 |
| Accumulated Amortization | 564 | 502 |
| Net Carrying Value | 665 | 319 |
| Intangible Asset, Excluding Goodwill, Indefinite-Lived [Abstract] | ||
| Intangible assets, gross | 1,419 | 1,011 |
| Net Carrying Value | 855 | 509 |
| Trade name | ||
| Intangible Asset, Excluding Goodwill, Indefinite-Lived [Abstract] | ||
| Unamortizable intangible assets | 190 | 190 |
| Customer contracts and related customer relationships | ||
| Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] | ||
| Gross Carrying Value | 920 | 619 |
| Accumulated Amortization | 406 | 365 |
| Net Carrying Value | 514 | 254 |
| Software | ||
| Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] | ||
| Gross Carrying Value | 309 | 202 |
| Accumulated Amortization | 158 | 137 |
| Net Carrying Value | $ 151 | $ 65 |
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- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of indefinite-lived intangible asset. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount, before accumulated amortization, of finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after accumulated amortization, of finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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