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Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) In Equity (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Stockholders' equity $ 9,348 $ 9,253 $ 9,346 $ 9,957 $ 10,275 $ 10,237
Accumulated other comprehensive loss            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Stockholders' equity (20) $ (44) (47) $ (28) $ (23) $ (12)
Foreign currency translation adjustment            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Stockholders' equity (27)   (57)      
Unrealized gain on defined benefit plans | Post-retirement healthcare obligations            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Stockholders' equity $ 7   $ 10