Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Dec. 31, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Benefit from income taxes	$ (2.7)	$ (14.3)	$ (8.3)	$ (17.3)
Effective tax rate (percentage)			33.90%	24.00%
Income tax at the federal statutory rate (percentage)			35.00%	35.00%
Unrecognized tax benefits related to deductions for share-based compensation			$ 5.4
Noncurrent liability for uncertain tax positions	19.0		19.0		$ 18.3
Unrecognized tax benefits	24.9		24.9		24.2
Unrecognized tax benefits that would impact effective tax rate	11.8		11.8		11.3
Interest on income taxes accrued	4.5		4.5		$ 4.1
Statute of Limitations Expected to Expire | State and Local Jurisdiction
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Amount of unrecorded benefit	$ 0.9		$ 0.9