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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS)      
Accumulated other comprehensive income (loss) $ 13.8 $ (41.7) $ (18.8)
Income tax expense, fair value through other comprehensive income   0.0 0.0
Income tax expense (recovery), cash flow hedges - effective portion   4.4 12.4
Income tax expense, cash flow hedges - reclassified out of accumulated other comprehensive income $ 5.0 $ (7.0) $ (3.5)