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Leases
 12 Months Ended
Dec. 31, 2024
Leases [Abstract]  
Leases Leases
Operating lease cost includes short-term leases and variable lease payments and approximates cash paid. Operating lease cost was $67, $63, and $61 in 2024, 2023, and 2022, respectively. Operating lease cost in 2024, 2023, and the second half of 2022 includes the lease for the portion of the property in Pittsburgh, PA used as the corporate headquarters.
Operating lease right-of-use assets and lease liabilities in the Consolidated Balance Sheet were as follows:
December 31,20242023
Right-of-use assets classified in Other noncurrent assets$155 $128 
Current portion of lease liabilities classified in Other current liabilities
$37 $32 
Long-term portion of lease liabilities classified in Other noncurrent liabilities and deferred credits119 97 
Total lease liabilities$156 $129 
Future minimum contractual operating lease obligations were as follows at December 31, 2024:
2025$46 
202639 
202729 
202821 
202915 
Thereafter39 
Total lease payments$189 
Less: Imputed interest(33)
Present value of lease liabilities$156 
December 31,202420232022
Right-of-use assets obtained in exchange for operating lease obligations$66 $68 $34 
Weighted-average remaining lease term in years5.96.45.6
Weighted-average discount rate5.7 %5.9 %5.4 %