Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018	Dec. 28, 2018	Dec. 29, 2017
Disaggregation of Revenue [Line Items]
Revenue Reserves	$ 339.3	$ 399.0	$ 339.3	$ 399.0	$ 405.4	$ 376.6
Revenue Reserve Provision			1,842.4	1,724.0
Revenue Reserve Payments or Credits			(1,908.5)	(1,701.6)
Deferred Revenue, Revenue Recognized			10.3
Contract with Customer, Liability	6.5		6.5		35.5
Contract with Customer, Liability, Current	5.9		5.9		20.4
Capitalized Contract Cost, Gross	26.4		26.4		28.4
Capitalized Contract Cost, Amortization			5.1	8.5
Contract with Customer, Liability, Noncurrent	0.6		0.6		15.1
Net sales	$ 743.7	$ 799.9	$ 2,357.6	$ 2,380.7
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue	81.40%	83.10%	81.70%	82.80%
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue	18.60%	16.90%	18.30%	17.20%
Royalty [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 19.5	$ 22.5	$ 56.3	$ 52.1
Rebates and Chargebacks [Member]
Disaggregation of Revenue [Line Items]
Revenue Reserves	282.8	348.0	282.8	348.0	354.3	327.4
Revenue Reserve Provision			1,772.9	1,644.5
Revenue Reserve Payments or Credits			(1,844.4)	(1,623.9)
Allowance for Sales Returns [Member]
Disaggregation of Revenue [Line Items]
Revenue Reserves	29.9	36.0	29.9	36.0	34.0	34.5
Revenue Reserve Provision			18.8	32.0
Revenue Reserve Payments or Credits			(22.9)	(30.5)
Other Sales Deductions [Member]
Disaggregation of Revenue [Line Items]
Revenue Reserves	$ 26.6	$ 15.0	26.6	15.0	$ 17.1	$ 14.7
Revenue Reserve Provision			50.7	47.5
Revenue Reserve Payments or Credits			$ (41.2)	$ (47.2)
Minimum
Disaggregation of Revenue [Line Items]
Royalty Rate Percentage			18.00%
Maximum
Disaggregation of Revenue [Line Items]
Royalty Rate Percentage			26.00%