Derivative Instruments (Effect of Derivative Instruments) (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in AOCI	$ 0.7	$ 3.6	$ 5.0	$ (0.1)
Net foreign exchange gain (loss) recognized in other income and expense, net	(0.2)	(0.2)	(0.4)	(0.2)
Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	(0.6)	0.8	(1.2)	2.0
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	0.7	0.6	1.5	1.1
Other Operating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	$ (1.2)	$ 6.0	$ 0.6	$ 3.0