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Fair Value Measurements (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of long-term debt | $ 795.2 | $ 798.1 |  |
Long-term debt, net of debt issuance costs | 770.2 | 779.3 |  |
Derivative, Notional Amount | 2,100.0 | 2,070.0 |  |
Foreign currency forward contracts, net notional value | 1,160.0 | 1,210.0 |  |
Investments, Fair Value Disclosure | 743.8 | 740.8 | $ 825.5 | $ 794.9
Deferred compensation plan, contra-equity, shares held in trust | 10.3 | 10.4 |  |
Foreign Exchange Contract [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative Asset, Fair Value, Gross Asset | 6.4 | 15.2 |  |
Derivative Asset, Fair Value, Gross Liability | (2.6) | (2.7) |  |
Derivative Liability, Fair Value, Gross Asset | (0.9) | (3.2) |  |
Derivative Liability, Fair Value, Gross Liability | 11.2 | 12.0 |  |
Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Investments, Fair Value Disclosure | 325.1 | 321.8 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Investments, Fair Value Disclosure | 0.0 | 0.0 |  |
Foreign currency forward contract, current asset amount | 3.8 | 12.5 |  |
Foreign currency forward contract, current liability amount | 10.3 | 8.8 |  |
Deferred compensation plan assets | 627.1 | 604.3 |  |
Deferred compensation plan liabilities | 589.9 | 576.1 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Investments, Fair Value Disclosure | 369.7 | 367.3 | $ 73.1 | $ 452.0
Foreign currency forward contract, current asset amount | 0.0 | 0.0 |  |
Foreign currency forward contract, current liability amount | 0.0 | 0.0 |  |
Deferred compensation plan assets | 0.0 | 0.0 |  |
Deferred compensation plan liabilities | $ 0.0 | $ 0.0 |  |

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