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OTHER LONG-TERM LIABILITIES
 12 Months Ended
Dec. 31, 2021
Subclassifications of assets, liabilities and equities [abstract]  
OTHER LONG-TERM LIABILITIES OTHER LONG-TERM LIABILITIES
As at December 31
(In millions of dollars)Note20212020
Deferred pension liability23 3 590 
Supplemental executive retirement plan23 96 92 
Stock-based compensation25 49 39 
Derivative instruments17 189 318 
Contract liabilities5 52 69 
Other 176 41 
Total other long-term liabilities 565 1,149