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Noncontrolling Interests - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Noncontrolling Interest [Line Items]
Noncontrolling interests	$ 380	$ 372
Net income attributable to noncontrolling interests	186	158	$ 162
Vantage and ClarusOne Sourcing Services LLC
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	$ 186	$ 158	$ 162

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