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Consolidated Statements of Changes in Shareholders' Deficit (Parenthetical) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]      
Issuance of common shares 1.2 1.7 1.7
Repurchases of common shares 4.1 21.0 19.0
Foreign currency translation adjustment, tax $ 1.1 $ 0.2 $ (2.0)
Unrealized Gain (loss) on derivatives, tax $ 0.0 $ 0.0 $ (0.4)