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Financial Instruments - Derivative Instruments Designated as Hedges (Details) - Foreign Exchange Forward - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Unrealized gains     $ 2 $ 2  
Unrealized losses     (3) (1)  
Total net unrealized (losses) gains     (1) 1  
Realized (losses) gains $ (6) $ (1) (12) $ (3)  
Level 2          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Foreign exchange forward contracts and options assets (classified in other current assets) 2   2   $ 0
Foreign exchange forward contract liabilities (classified in accounts payable and accrued liabilities) $ 4   $ 4   $ 13