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Fair Value (Tables)
9 Months Ended
Sep. 30, 2024
Fair Value Disclosures [Abstract]  
Summary of Components of Fair Value Measurements of Financial Assets and Liabilities
The areas in which we utilize fair value measures of financial assets and liabilities are presented in the table below.
 As of September 30, 2024
 Level 1Level 2Level 3Total
Assets:
Cash equivalents:
Bank time deposits with original maturities of three months or less$ $130.4 $ $130.4 
Derivative assets (Note N)
 3.0  3.0 
Diversified investments associated with the ESU Program55.2   55.2 
Total assets$55.2 $133.4 $ $188.6 
Liabilities:
Derivative liabilities (Note N)
$ $2.2 $ $2.2 
Liabilities associated with the ESU Program56.8   56.8 
Total liabilities$56.8 $2.2 $ $59.0 
 As of December 31, 2023
 Level 1Level 2Level 3Total
Assets:
Cash equivalents:
Bank time deposits with original maturities of three months or less$— $147.5 $— $147.5 
Derivative assets (Note N)
— 6.2 — 6.2 
Diversified investments associated with the ESU Program50.4 — — 50.4 
Total assets$50.4 $153.7 $— $204.1 
Liabilities:
Derivative liabilities (Note N)
$— $3.5 $— $3.5 
Liabilities associated with the ESU Program52.4 — — 52.4 
Total liabilities$52.4 $3.5 $— $55.9