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Other Financial Data - Other Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other Liabilities [Abstract]      
Defined benefit plans $ 939 $ 1,004  
Non-current contract liabilities 424 363 $ 306
Unrecognized tax benefits 26 29  
Deferred income taxes 55 73  
Environmental Reserve 119 108  
Other 178 114  
Other liabilities $ 1,741 $ 1,691