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Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Other Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Short-term borrowings $ 3.8 $ 74.0
Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash equivalents 460.8 153.9
Short-term borrowings 3.8 74.0
Fair Value | Fair Value, Inputs, Level 1    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash equivalents 460.8 153.9
Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Short-term borrowings 3.8 74.0
Senior notes 439.6 464.7
Term Loan Due December 22, 2024 | Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes 200.0 400.0
Term Loan Due December 22, 2024 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior notes 200.0 400.0
3.15% Senior notes due August 1, 2027 | Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes 424.8 424.8
3.15% Senior notes due August 1, 2027 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior notes 393.7 397.3
2.3% Senior notes due December 15, 2031 | Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes 399.3 399.3
2.3% Senior notes due December 15, 2031 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior notes 315.6 321.3
5.6% Senior notes due November 15, 2032 | Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes 499.2 499.1
5.6% Senior notes due November 15, 2032 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior notes 500.3 518.9
3.95% Senior notes due August 1, 2047 | Carrying Amount    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes 397.7 397.6
3.95% Senior notes due August 1, 2047 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior notes 300.6 316.7
5.00% Senior notes due June 15, 2052 [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Senior Notes $ 499.8 $ 499.7