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Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	$ 808	$ 787
Accumulated Amortization	461	414
Net Carrying Value	347	373
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets, gross	998	977
Net Carrying Value	537	563
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	619
Accumulated Amortization	335	305
Net Carrying Value	284	314
Software
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	189	168
Accumulated Amortization	126	109
Net Carrying Value	$ 63	$ 59

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Section 55
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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