XML 228 R151.htm IDEA: XBRL DOCUMENT v3.22.0.1
STOCK-BASED COMPENSATION - Employee Stock Options (Details)
shares in Millions
12 Months Ended
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
$ / shares
Dec. 31, 2020
shares
$ / shares
Dec. 31, 2020
shares
$ / shares
$ / shares
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
Dec. 31, 2019
$ / shares
Canada                
Disclosure of terms and conditions of share-based payment arrangement [line items]                
Number of options at January 1 (shares) 0.1 0.1 0.2 0.2        
Number of share options exercised in share-based payment arrangement (0.1) (0.1) (0.1) (0.1)        
Number of options at December 31 (shares) 0.0 0.0 0.1 0.1        
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares $ 0 $ 0 $ 10 $ 10     $ 10  
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 10   $ 10          
United States                
Disclosure of terms and conditions of share-based payment arrangement [line items]                
Number of options at January 1 (shares) 0.0 0.0 0.1 0.1        
Number of options cancelled/expired (shares) 0.0 0.0 (0.1) (0.1)        
Number of options at December 31 (shares) 0.0 0.0 0.0 0.0        
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares         $ 0 $ 0   $ 32
Weighted average exercise price of share options expired in share-based payment arrangement | $ / shares   $ 0   $ 32