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Supplemental Data (Summary of Accounts Receivable, Net) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Supplemental Data (Millions of dollars) [Abstract]    
From customers $ 2,063 $ 2,155
Other 150 189
Less allowance for doubtful accounts and sales discounts (78) (64)
Total $ 2,135 $ 2,280