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OPERATING COSTS
 12 Months Ended
Dec. 31, 2023
Operating Costs [Abstract]  
OPERATING COSTS OPERATING COSTS
  Years ended December 31
(In millions of dollars)Note20232022
Cost of equipment sales17 2,451 2,141 
Merchandise for resale17 217 235 
Other external purchases5,606 4,401 
Employee salaries, benefits, and stock-based compensation2,453 2,226 
Total operating costs10,727 9,003