Income Tax Expenses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Earnings from continuing operations before income taxes	$ 106.7	$ 80.6	$ 239.6	$ 195.3
Income tax expense	$ 16.0	$ 16.4	$ 48.8	$ 42.3
Effective tax rate	15.00%	20.30%	20.40%	21.70%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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