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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME    
Income tax expense, equity investments   $ 0.3
Income tax expense (recovery), cash flow hedges - effective portion $ (12.5) 4.5
Income tax expense, cash flow hedges - reclassified out of accumulated other comprehensive income $ 10.4 $ 3.2