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Fair Value Measurements (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,830.0 | $ 2,610.0 |  |
Fair value of long-term debt | 622.9 | 687.2 |  |
Long-term debt, net of debt issuance costs | 364.4 | 395.6 |  |
Investments, Fair Value Disclosure | 786.1 | 639.6 | $ 505.0 | $ 340.3
Foreign currency forward contracts, net notional value | 1,140.0 | 1,510.0 |  |
Deferred compensation plan, contra-equity, shares held in trust | 5.1 | 5.2 |  |
Foreign Exchange Contract [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative Asset, Fair Value, Gross Asset | 8.9 | 19.2 |  |
Derivative Asset, Fair Value, Gross Liability | 1.1 | 3.3 |  |
Derivative Liability, Fair Value, Gross Asset | 0.2 | 0.2 |  |
Derivative Liability, Fair Value, Gross Liability | 1.4 | 1.0 |  |
Long-Term Senior Notes [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Unamortized Debt Issuance Expense | 1.4 | 1.4 |  |
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 | 267.0 | 251.6 |  |
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 | 7.8 | 15.9 |  |
Foreign currency forward contract, current liability amount | 1.2 | 0.8 |  |
Deferred compensation plan assets | 528.1 | 528.8 |  |
Deferred compensation plan liabilities | $ 484.9 | $ 513.0 |  |

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 + Details
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