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Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Contract assets:      
Contract asset, current $ 171,000,000 $ 84,000,000 $ 95,000,000
Contract asset, noncurrent 5,000,000 39,000,000 0
Additions 175,000,000 114,000,000  
Transfers to accounts receivable 122,000,000 86,000,000  
Contract liabilities:      
Contract liability, current 19,000,000 40,000,000 63,000,000
Customer liability, noncurrent 19,000,000 14,000,000 $ 0
Additions 88,000,000 83,000,000  
Transfers to operating revenues $ 104,000,000 $ 92,000,000