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Derivative Financial Instruments and Fair Value Measurements - Impact of Changes in Fair Values of Derivatives Designated as Cash Flow Hedges on OCI, AOCI and Earnings (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Derivative [Line Items] |  |  |  |
Gain (Loss) Reclassified from AOCL into Income | $ 0.1 | $ 0.1 | $ 0.3 | $ 0.3
Gain (Loss) Recognized in Income | 0.1 | 0.1 | 0.3 | 0.3
Cross-currency swap | Cash flow hedge | Nondesignated [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in OCI | 0.0 | (2.6) | (0.2) | (2.1)
Gain (Loss) Reclassified from AOCL into Income | 0.0 | 7.4 | 2.0 | (4.5)
Gain (Loss) Recognized in Income | 0.0 | 7.4 | 2.0 | (4.5)
Cross-currency swap | Net Investment Hedging [Member] | Designated as hedging instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in OCI | (80.9) | 26.8 | (13.5) | (1.9)
Intercompany CHF note [Member] | Cash flow hedge | Nondesignated [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in OCI | 0.0 | 0.0 | 0.0 | 0.0
Gain (Loss) Reclassified from AOCL into Income | 0.0 | (7.4) | (2.0) | 4.5
Gain (Loss) Recognized in Income | 0.0 | (7.4) | (2.0) | 4.5
Forward Starting Interest Swap | Cash flow hedge | Designated as hedging instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in OCI | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition Amount, after tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge, attributable to parent. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (dd) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A + Details
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