Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of income tax provision and the respective effective income tax rates

Our income tax provision for the periods presented and the respective effective income tax rates for such periods are as follows (in millions, except for income tax rates): 

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
Income tax provision	$	23.0		$	82.6		$	42.7		$	92.2
Effective income tax rate	37.3		%	185.0		%	30.1		%	79.8		%