Consolidated Statements of Operations and Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net (loss) from discontinued operations, net of tax expense	$ 0.0	$ 0.0	$ 12.0
(Loss) from disposal of discontinued businesses, net of tax expense (benefit)	$ 1.7	$ (1.4)	$ (5.2)

Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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