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COMMON SHARE CAPITAL (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
COMMON SHARE CAPITAL    
Balance at beginning of the period (shares) 1,258,320,461  
Balance at beginning of the period $ 6,663.0  
Repurchase and cancellation of shares (in shares) (17,608,678)  
Balance at end of the period (shares) 1,244,332,772 1,258,320,461
Balance at end of the period $ 6,649.6 $ 6,663.0
Total common share capital $ 4,427.7 $ 4,473.7
Common share capital    
COMMON SHARE CAPITAL    
Balance at beginning of the period (shares) 1,258,320,000 1,253,766,000
Balance at beginning of the period $ 4,473.7 $ 14,926.2
Transfer to contributed surplus on reduction of stated capital   $ (10,473.4)
Repurchase and cancellation of shares (in shares) (17,608,000)  
Repurchase and cancellation of shares $ (62.9)  
Issued under share option and restricted share plans (shares) 3,621,000 4,554,000
Issued under share option and restricted share plans $ 16.9 $ 20.9
Balance at end of the period (shares) 1,244,333,000 1,258,320,000
Balance at end of the period $ 4,427.7 $ 4,473.7
Total common share capital $ 4,427.7 $ 4,473.7