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OTHER EXPENSE (INCOME) (Tables)
12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
Disclosure of other expense (income)
  Years ended December 31
(In millions of dollars)Note20202019
Losses from associates and joint ventures18 40 25 
Other investment income(39)(35)
Total other expense (income)1 (10)