Income Taxes Schedule of Income before Income Tax, Domestic and Foreign (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

The components of income before income taxes are listed below.

	Years ended December 31,
	2017		2016		2015
Domestic	$	528.2	$	504.7	$	461.0
Foreign	347.8		325.5		301.2
Total	$	876.0	$	830.2	$	762.2