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PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Weighted Average Asset Allocation for the Funded Defined Benefit Pension Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of fair value of plan assets [line items]    
Return on plan assets excluding interest income or expense, net defined benefit liability (asset) $ 150 $ 659
Canada    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 35.00% 47.00%
Fixed Income Securities (including cash) (in percent) 53.00% 46.00%
Real Estate (in percent) 7.00% 6.00%
Other (in percent) 5.00% 1.00%
Total (in percent) 100.00% 100.00%
Brazil    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 6.00% 6.00%
Fixed Income Securities (including cash) (in percent) 87.00% 77.00%
Real Estate (in percent) 1.00% 1.00%
Other (in percent) 6.00% 16.00%
Total (in percent) 100.00% 100.00%
Europe    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 1.00% 1.00%
Fixed Income Securities (including cash) (in percent) 69.00% 72.00%
Real Estate (in percent) 0.00% 0.00%
Other (in percent) 30.00% 27.00%
Total (in percent) 100.00% 100.00%
- Asset classes that have a quoted market price in an active market | Canada    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 27.00% 39.00%
Fixed Income Securities (including cash) (in percent) 49.00% 42.00%
Real Estate (in percent) 0.00% 0.00%
Other (in percent) 0.00% 0.00%
- Asset classes that have a quoted market price in an active market | Brazil    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 3.00% 3.00%
Fixed Income Securities (including cash) (in percent) 87.00% 77.00%
Real Estate (in percent) 0.00% 1.00%
Other (in percent) 6.00% 16.00%
- Asset classes that have a quoted market price in an active market | Europe    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 1.00% 1.00%
Fixed Income Securities (including cash) (in percent) 69.00% 72.00%
Real Estate (in percent) 0.00% 0.00%
Other (in percent) 8.00% 5.00%
- Asset classes that do not have a quoted market price in an active market | Canada    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 8.00% 8.00%
Fixed Income Securities (including cash) (in percent) 4.00% 4.00%
Real Estate (in percent) 7.00% 6.00%
Other (in percent) 5.00% 1.00%
- Asset classes that do not have a quoted market price in an active market | Brazil    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 3.00% 3.00%
Fixed Income Securities (including cash) (in percent) 0.00% 0.00%
Real Estate (in percent) 1.00% 0.00%
Other (in percent) 0.00% 0.00%
- Asset classes that do not have a quoted market price in an active market | Europe    
Disclosure of fair value of plan assets [line items]    
Equity Securities (in percent) 0.00% 0.00%
Fixed Income Securities (including cash) (in percent) 0.00% 0.00%
Real Estate (in percent) 0.00% 0.00%
Other (in percent) 22.00% 22.00%