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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Millions
Share capital (Note 14)
Contributed Surplus
Accumulated other comprehensive income (loss)
Deficit
Total
Balance at beginning of year at Dec. 31, 2015 $ 3,709.0 $ 44.3 $ (288.1) $ (302.2) $ 3,163.0
Net income       122.2 122.2
Other comprehensive income     63.6   63.6
Total comprehensive income (loss)         185.8
Equity offering 893.9       893.9
Exercise of stock options 21.8 (5.5)     16.3
Share-based payments   5.6     5.6
Vesting of restricted share units 2.8 (2.8)      
Dividend reinvestment plan 38.7       38.7
Dividends Declared       156.8 156.8
Balance at end of year at Dec. 31, 2016 4,666.2 41.6 (224.5) (336.8) 4,146.5
Net income       194.7 194.7
Other comprehensive income     118.0   118.0
Total comprehensive income (loss)         312.7
Exercise of warrants 382.9 (26.5)     356.4
Exercise of stock options 14.1 (4.0)     10.1
Share-based payments   5.6     5.6
Vesting of restricted share units 2.5 (2.5)      
Dividend reinvestment plan 42.1       42.1
Dividends Declared       167.9 167.9
Balance at end of year at Dec. 31, 2017 $ 5,107.8 $ 14.2 $ (106.5) $ (310.0) $ 4,705.5