Income Taxes - Narrative (Details) - USD ($) $ in Millions		6 Months Ended
	Jan. 02, 2017	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate (percent)		44.30%	35.20%
Effective Income Tax Rate Reconciliation, Increase, Percent		4.30%
Increase in excess tax, percent	2.60%
Decrease in effective tax rate (percent)			2.50%
Gross unrecognized tax benefit		$ 6.0		$ 3.9
Expected change in unrecognized tax benefits		3.8
Accrued interest on income taxes		1.0		1.0
Accrued penalties on income taxes, less than		$ 0.1		$ 0.1