Condensed Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Other comprehensive income (loss), tax	$ 0.0	$ (0.1)	$ 0.0	$ (0.1)

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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+ Details