XML 203 R163.htm IDEA: XBRL DOCUMENT v3.10.0.1
STOCK-BASED COMPENSATION - DSU and RSU Activity (Details)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
DSUs    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number of units outstanding beginning of period (shares) | shares 725.0 573.0
Settled for cash (shares) | shares (143.0) 0.0
Forfeited (shares) | shares 0.0 0.0
Granted (shares) | shares 182.0 152.0
Credits for dividends (shares) | shares 0.0 0.0
Number of units outstanding end of period (shares) | shares 764.0 725.0
Fair value, beginning of period | $ $ 11.6 $ 9.2
Settled for cash | $ (1.9) 0.0
Forfeited | $ 0.0 0.0
Granted | $ 2.3 2.5
Credits for dividends | $ $ 0.0 $ 0.0
Increase (decrease) in number of shares outstanding | shares 0.0 0.0
Change in value | $ $ (0.8) $ (0.1)
Fair value, end of period | $ $ 11.2 $ 11.6
RSUs    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number of units outstanding beginning of period (shares) | shares 4,537.0 6,452.0
Settled for cash (shares) | shares (3,089.0) (3,610.0)
Forfeited (shares) | shares (731.0) (121.0)
Granted (shares) | shares 2,974.0 1,760.0
Credits for dividends (shares) | shares 60.0 56.0
Number of units outstanding end of period (shares) | shares 3,751.0 4,537.0
Fair value, beginning of period | $ $ 37.7 $ 58.6
Settled for cash | $ (34.6) (62.5)
Forfeited | $ (7.9) (2.3)
Granted | $ 35.3 32.7
Credits for dividends | $ $ 0.8 $ 0.9
Increase (decrease) in number of shares outstanding | shares 0.0 0.0
Change in value | $ $ 4.7 $ 10.3
Fair value, end of period | $ $ 36.0 $ 37.7