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Financial Instruments and Fair Value - Schedule of Assets and Liabilities Measured at Fair Value Recurring Basis (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other investments   $ 2.0
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets (includes $10.2 and $31.3 at fair value) Other assets (includes $10.2 and $31.3 at fair value)
Minimum | Measurement Input, Risk Free Interest Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input 0.040  
Maximum | Measurement Input, Risk Free Interest Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input 0.047  
Recurring fair value measurements:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps $ 5.5 $ 22.8
Debt securities 4.7 4.7
Other investments   3.8
Total assets 963.6 735.5
Recurring fair value measurements: | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps 0.0 0.0
Debt securities 0.0 0.0
Other investments   0.0
Total assets 953.4 650.7
Recurring fair value measurements: | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps 5.5 22.8
Debt securities 0.0 0.0
Other investments   0.0
Total assets 5.5 76.3
Recurring fair value measurements: | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps 0.0 0.0
Debt securities 4.7 4.7
Other investments   3.8
Total assets 4.7 8.5
Cash | Recurring fair value measurements:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 133.4 103.7
Cash | Recurring fair value measurements: | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 133.4 103.7
Cash | Recurring fair value measurements: | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 0.0 0.0
Cash | Recurring fair value measurements: | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 0.0 0.0
Money market mutual funds | Recurring fair value measurements:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 820.0 547.0
Money market mutual funds | Recurring fair value measurements: | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 820.0 547.0
Money market mutual funds | Recurring fair value measurements: | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value 0.0 0.0
Money market mutual funds | Recurring fair value measurements: | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value $ 0.0 0.0
Term deposits | Recurring fair value measurements:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value   53.5
Term deposits | Recurring fair value measurements: | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value   0.0
Term deposits | Recurring fair value measurements: | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value   53.5
Term deposits | Recurring fair value measurements: | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, fair value   $ 0.0