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Special Charges and Other, Net - Summary of Activity in Special Charges and Other, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Restructuring Charges [Abstract]
Employee separation costs	$ 27.1	$ 0.0	$ 0.0
Contract exit costs	45.7	0.0	0.0
Other restructuring costs	3.7	6.2	16.8
Gain on sale of assets	0.0	0.0	(2.2)
Legal contingencies	1.0	(1.3)	(19.4)
Other	1.7	(17.2)	0.8
Total	$ 79.2	$ (12.3)	$ (4.0)

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Special Charges, Other

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of gain (loss) on sale or disposal of other assets.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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