Derivative Financial Instruments and Fair Value Measurements - Fair Value of Derivative and Non-Derivative Assets and Liabilities on the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Derivatives, Fair Value [Line Items]
Assets	$ 18.5	$ 14.6
Liabilities	1,132.5	1,742.7
Nondesignated [Member] \| Foreign currency forward contracts \| Long-term debt
Derivatives, Fair Value [Line Items]
Liabilities		583.8
Nondesignated [Member] \| Foreign currency forward contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	0.2	0.8
Cash flow hedge \| Nondesignated [Member] \| Foreign currency forward contracts \| Accounts receivable, net
Derivatives, Fair Value [Line Items]
Assets	0.1
Fair Value Hedge \| Designated as hedging instrument \| Cross-currency swap \| Other assets
Derivatives, Fair Value [Line Items]
Assets	18.4	14.6
Net Investment Hedging \| Designated as hedging instrument \| Cross-currency swap \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	30.8	33.1
Net Investment Hedging \| Designated as hedging instrument \| Cross-currency swap \| Other long-term liabilities
Derivatives, Fair Value [Line Items]
Liabilities	67.2	69.8
Net Investment Hedging \| Designated as hedging instrument \| Euro Notes due in 2026 \| Short-term Borrowings And Current Maturities Of Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Liabilities	0.0	586.9
Net Investment Hedging \| Designated as hedging instrument \| Euro Notes due in 2026 \| Long-term debt
Derivatives, Fair Value [Line Items]
Liabilities	460.9	468.3
Net Investment Hedging \| Designated as hedging instrument \| Euro Notes Due In 2027 \| Long-term debt
Derivatives, Fair Value [Line Items]
Liabilities	$ 573.4	$ 0.0