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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Measured at Fair Value on Nonrecurring Basis The following tables present the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis and not measured using the equity method of accounting, with fair values shown according to the fair value hierarchy. The tables exclude carrying amounts for cash and cash equivalents and restricted cash (Level 1 measurements), accounts receivable and contract assets, accounts payable, contract liabilities and other current liabilities, and other assets and liabilities (Level 2 measurements) that approximate fair value due to the relatively short periods to maturity (in millions):
September 30, 2025Fair Value Measurement Using:
Carrying ValueEstimated Fair Value
Quoted Prices (Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Assets
Measurement alternative investment (1)
$0.9 $0.9 $— $— $0.9 
Total assets not accounted for at fair value$0.9 $0.9 $— $— $0.9 
Liabilities
Debt obligations (2)
$668.9 $607.7 $— $590.1 $17.6 
Total liabilities not accounted for at fair value$668.9 $607.7 $— $590.1 $17.6 
(1) Refer to Note 6. Investments for additional information.
(2) Excludes lease obligations accounted for under ASC 842, Leases.

December 31, 2024Fair Value Measurement Using:
Carrying ValueEstimated Fair Value
Quoted Prices (Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Assets
Measurement alternative investment (1)
$0.9 $0.9 $— $— $0.9 
Total assets not accounted for at fair value$0.9 $0.9 $— $— $0.9 
Liabilities
Debt obligations (2)
$662.2 $577.1 $— $577.1 $— 
Total liabilities not accounted for at fair value$662.2 $577.1 $— $577.1 $— 
(1) Refer to Note 6. Investments for additional information.
(2) Excludes lease obligations accounted for under ASC 842, Leases.