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Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Fair Value Measurements [Abstract]
Investments	$ 6.1	$ 4.1
Deferred compensation obligations	6.1	4.1
U.S. Pension Plans
Fair Value Measurements [Abstract]
Fair value of plan assets	150.8	150.5	$ 153.3
U.S. Pension Plans | Money Market Investments
Fair Value Measurements [Abstract]
Fair value of plan assets	2.7	6.7
U.S. Pension Plans | Fixed Income Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	51.3	45.3
U.S. Pension Plans | Pooled Equity Funds
Fair Value Measurements [Abstract]
Fair value of plan assets		7.0
U.S. Pension Plans | U.S. Government and Agency Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	87.0	57.0
U.S. Pension Plans | Other
Fair Value Measurements [Abstract]
Fair value of plan assets	9.8	6.8
U.S. Pension Plans | Total [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	150.8	122.8
U.S. Pension Plans | Level 1
Fair Value Measurements [Abstract]
Fair value of plan assets	1.4	8.1
U.S. Pension Plans | Level 1 | Money Market Investments
Fair Value Measurements [Abstract]
Fair value of plan assets	0.0	0.0
U.S. Pension Plans | Level 1 | Fixed Income Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	0.0	0.0
U.S. Pension Plans | Level 1 | Pooled Equity Funds
Fair Value Measurements [Abstract]
Fair value of plan assets		7.0
U.S. Pension Plans | Level 1 | U.S. Government and Agency Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	0.0	0.0
U.S. Pension Plans | Level 1 | Other
Fair Value Measurements [Abstract]
Fair value of plan assets	1.4	1.1
U.S. Pension Plans | Level 2
Fair Value Measurements [Abstract]
Fair value of plan assets	149.4	114.7
U.S. Pension Plans | Level 2 | Money Market Investments
Fair Value Measurements [Abstract]
Fair value of plan assets	2.7	6.7
U.S. Pension Plans | Level 2 | Fixed Income Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	51.3	45.3
U.S. Pension Plans | Level 2 | Pooled Equity Funds
Fair Value Measurements [Abstract]
Fair value of plan assets		0.0
U.S. Pension Plans | Level 2 | U.S. Government and Agency Securities
Fair Value Measurements [Abstract]
Fair value of plan assets	87.0	57.0
U.S. Pension Plans | Level 2 | Other
Fair Value Measurements [Abstract]
Fair value of plan assets	8.4	5.7
U.S. Pension Plans | Level 3
Fair Value Measurements [Abstract]
Fair value of plan assets	$ 0.0	0.0
U.S. Pension Plans | Net Asset Value
Fair Value Measurements [Abstract]
Fair value of plan assets		$ 27.7

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