Income Tax Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes	$ 74.3	$ 60.9	$ 124.0	$ (239.2)
Income tax expense (benefit)	$ 19.2	$ 11.4	$ 31.4	$ (66.1)
Effective tax rate	25.80%	18.70%	25.30%	27.60%