v3.25.2
Fair Value - Schedule of Components of Fair Value Measurements of Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Cash equivalents:    
Derivative asset, statement of financial position [extensible enumeration] Assets, Current, Sundry Assets, Current, Sundry
Liabilities:    
Derivative liability, statement of financial position [extensible enumeration] Liabilities, Noncurrent, Other current liabilities Liabilities, Noncurrent, Other current liabilities
Recurring    
Cash equivalents:    
Derivative assets (Note M) $ 3.2 $ 5.1
Total assets 220.2 216.2
Liabilities:    
Derivative liabilities 5.4 7.0
Total liabilities 62.8 60.9
Recurring | Diversified investments associated with the Executive Stock Unit (ESU) Program    
Cash equivalents:    
Diversified investments associated with the Executive Stock Unit (ESU) Program 55.2 55.1
Recurring | Liabilities associated with the ESU Program    
Liabilities:    
Liabilities associated with the ESU Program 57.4 53.9
Recurring | Bank time deposits with original maturities of three months or less    
Cash equivalents:    
Bank time deposits with original maturities of three months or less 161.8 156.0
Recurring | Level 1    
Cash equivalents:    
Derivative assets (Note M) 0.0 0.0
Total assets 55.2 55.1
Liabilities:    
Derivative liabilities 0.0 0.0
Total liabilities 57.4 53.9
Recurring | Level 1 | Diversified investments associated with the Executive Stock Unit (ESU) Program    
Cash equivalents:    
Diversified investments associated with the Executive Stock Unit (ESU) Program 55.2 55.1
Recurring | Level 1 | Liabilities associated with the ESU Program    
Liabilities:    
Liabilities associated with the ESU Program 57.4 53.9
Recurring | Level 1 | Bank time deposits with original maturities of three months or less    
Cash equivalents:    
Bank time deposits with original maturities of three months or less 0.0 0.0
Recurring | Level 2    
Cash equivalents:    
Derivative assets (Note M) 3.2 5.1
Total assets 165.0 161.1
Liabilities:    
Derivative liabilities 5.4 7.0
Total liabilities 5.4 7.0
Recurring | Level 2 | Diversified investments associated with the Executive Stock Unit (ESU) Program    
Cash equivalents:    
Diversified investments associated with the Executive Stock Unit (ESU) Program 0.0 0.0
Recurring | Level 2 | Liabilities associated with the ESU Program    
Liabilities:    
Liabilities associated with the ESU Program 0.0 0.0
Recurring | Level 2 | Bank time deposits with original maturities of three months or less    
Cash equivalents:    
Bank time deposits with original maturities of three months or less 161.8 156.0
Recurring | Level 3    
Cash equivalents:    
Derivative assets (Note M) 0.0 0.0
Total assets 0.0 0.0
Liabilities:    
Derivative liabilities 0.0 0.0
Total liabilities 0.0 0.0
Recurring | Level 3 | Diversified investments associated with the Executive Stock Unit (ESU) Program    
Cash equivalents:    
Diversified investments associated with the Executive Stock Unit (ESU) Program 0.0 0.0
Recurring | Level 3 | Liabilities associated with the ESU Program    
Liabilities:    
Liabilities associated with the ESU Program 0.0 0.0
Recurring | Level 3 | Bank time deposits with original maturities of three months or less    
Cash equivalents:    
Bank time deposits with original maturities of three months or less $ 0.0 $ 0.0