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Other Income - Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other Income and Expenses [Abstract]      
Pension and other postretirement benefits (Note 12) $ 117 $ 126 $ 102
COLI – net 65 (77) 17
Other 9 (36) (42)
Other income – net $ 191 $ 13 $ 77