Goodwill and Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Total intangible assets, accumulated amortization	$ 186.6	$ 171.3
Total intangible assets, cost	1,644.3	1,673.7
Total intangible assets, net	1,457.7	1,502.4
Customer Relationships [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	1,171.0	1,187.7
Total intangible assets, accumulated amortization	147.9	137.8
Intangible assets subject to amortization, net	1,023.1	1,049.9
Product Technology and Patents [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	209.6	210.0
Total intangible assets, accumulated amortization	38.7	33.5
Intangible assets subject to amortization, net	170.9	176.5
Tradenames and Trademarks [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, cost	247.7	260.0
In-process Research and Development [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, cost	$ 16.0	$ 16.0