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Fair Value
 12 Months Ended
Dec. 31, 2025
Fair Value Disclosures [Abstract]  
Fair Value Fair Value
The areas in which we utilize fair value measures of financial assets and liabilities are presented in the table below:
 As of December 31, 2025
 Level 1Level 2Level 3Total
Assets:    
Cash equivalents:    
Bank time deposits with original maturities of three months or less$— $217.0 $— $217.0 
Derivative assets (see Note R)
— 4.5 — 4.5 
Diversified investments associated with the ESU program (see Note L)
60.2 — — 60.2 
Total assets$60.2 $221.5 $— $281.7 
Liabilities:    
Derivative liabilities (see Note R)
$— $1.2 $— $1.2 
Liabilities associated with the ESU program (see Note L)
62.4 — — 62.4 
Total liabilities$62.4 $1.2 $— $63.6 
 As of December 31, 2024
 Level 1Level 2Level 3Total
Assets:    
Cash equivalents:    
Bank time deposits with original maturities of three months or less$— $156.0 $— $156.0 
Derivative assets (see Note R)
— 5.1 — 5.1 
Diversified investments associated with the ESU program (see Note L)
55.1 — — 55.1 
Total assets$55.1 $161.1 $— $216.2 
Liabilities:    
Derivative liabilities (see Note R)
$— $7.0 $— $7.0 
Liabilities associated with the ESU program (see Note L)
53.9 — — 53.9 
Total liabilities$53.9 $7.0 $— $60.9 
There were no transfers between Level 1 and Level 2 for any of the periods presented.
The fair value for fixed rate debt (Level 1) was approximately $175.0 less than carrying value of $1,490.0 at December 31, 2025 and was approximately $245.0 less than carrying value of $1,488.3 at December 31, 2024.