Income Taxes (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ 235.1	$ 294.5	$ 290.3
Income tax expense, percent of earnings before income taxes	23.80%	33.70%	36.80%
Income tax benefit attributable to discrete income tax items	$ 7.1
Undistributed earnings from foreign subsidiaries	$ 248.0