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Schedule II - Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2023
Receivables [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Schedule II—Valuation and Qualifying Accounts
Balance,Balance,
Beginning ofEnd of
(MILLIONS OF DOLLARS)PeriodAdditionsDeductionsPeriod
Year Ended December 31, 2023
Allowance for doubtful accounts$19 $ $(1)$18 
Year Ended December 31, 2022
Allowance for doubtful accounts$17 $$(2)$19 
Year Ended December 31, 2021
Allowance for doubtful accounts$20 $$(4)$17