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OPERATING COSTS (Tables)
 12 Months Ended
Dec. 31, 2024
Operating Costs [Abstract]  
Disclosure of operating costs
  Years ended December 31
(In millions of dollars)Note20242023
Cost of equipment sales17 2,540 2,451 
Merchandise for resale17 209 217 
Other external purchases5,930 5,606 
Employee salaries, benefits, and stock-based compensation2,308 2,453 
Total operating costs10,987 10,727