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Other Financial Data - Other Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Other Liabilities [Abstract]      
Defined benefit plans (Note 8) $ 1,004 $ 1,390  
Non-current contract liabilities 363 306 $ 283
Unrecognized tax benefits (Note 7) 29 36  
Deferred income taxes (Note 7) 73 183  
Environmental Reserve 108 108  
Other 114 125  
Other liabilities $ 1,691 $ 2,148