New Accounting Pronouncements - Narrative (Detail) - USD ($) $ in Millions		12 Months Ended
	Jul. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Item Effected [Line Items]
Total net sales		$ 6,276.2	$ 6,800.2	$ 6,939.6
Total gross profit		1,190.9	1,255.4	1,316.2
Inventories		301.8	329.7
Accrued liabilities and other		334.2	347.4
Stockholders equity		$ (383.7)	(260.1)
Accounting Standards Update 2018 02
Item Effected [Line Items]
Decrease to accumulated deficit and increase to accumulated other comprehensive loss	$ 22.0
Accounting Standards Update 2017 07 | Cost of Sales
Item Effected [Line Items]
Operating change by adoption of new accounting standard				4.1
Accounting Standards Update 2017 07 | Selling, General and Administrative Expenses
Item Effected [Line Items]
Operating change by adoption of new accounting standard				11.0
Accounting Standards Update 2017 07 | Investment And Other Income Net
Item Effected [Line Items]
Operating change by adoption of new accounting standard				$ 15.1
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Item Effected [Line Items]
Total net sales			18.1
Total gross profit			3.7
Inventories			(80.5)
Accrued liabilities and other			(98.8)
Stockholders equity			$ 16.7