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Accounts Receivable
 12 Months Ended
Dec. 31, 2024
Receivables [Abstract]  
Accounts receivable Accounts receivable
In millionsAs at December 31,20242023
Freight$966 $1,051 
Non-freight219 274 
Gross accounts receivable1,185 1,325 
Allowance for credit losses
(21)(25)
Net accounts receivable$1,164 $1,300