Changes in Accumulated Other Comprehensive Loss (Components of Other Comprehensive Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax	$ 48,800,000	$ 7,600,000	$ 85,100,000	$ 12,900,000
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning			1,845,000,000
Other comprehensive income (loss) prior to reclassifications (1) (2)			6,600,000
Amounts reclassified from accumulated other comprehensive loss			(200,000)
Other comprehensive (loss) income, net of tax	(700,000)	$ 1,900,000	6,400,000	$ 2,900,000
Balance, ending	2,119,300,000		2,119,300,000
Foreign currency translation adjustment, tax			0
Cash flow hedges, tax			400,000
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning			(50,200,000)
Other comprehensive income (loss) prior to reclassifications (1) (2)			7,100,000
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive (loss) income, net of tax			7,100,000
Balance, ending	(43,100,000)		(43,100,000)
Effects of Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning			0
Other comprehensive income (loss) prior to reclassifications (1) (2)			(500,000)
Amounts reclassified from accumulated other comprehensive loss			(200,000)
Other comprehensive (loss) income, net of tax			(700,000)
Balance, ending	(700,000)		(700,000)
Total
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning			(50,200,000)
Balance, ending	$ (43,800,000)		(43,800,000)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax			$ 200,000