Income Tax Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Earnings from continuing operations before income taxes	$ 70.1	$ 41.3	$ 125.5	$ 46.2
Income tax expense	$ 28.6	$ 24.7	$ 53.2	$ 36.7
Effective tax rate	40.80%	59.80%	42.40%	79.40%