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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME    
Net loss $ (73.5) $ (1,240.5)
Other comprehensive income    
(Loss) gain on revaluation of gold stream obligation (24.4) 66.6
Deferred income tax related to gold stream obligation 4.7 (21.6)
Total other comprehensive (loss) income (19.7) 45.0
Total comprehensive loss $ (93.2) $ (1,195.5)