Goodwill and Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Total intangible assets, accumulated amortization	$ 205.3	$ 171.3
Total intangible assets, cost	1,655.7	1,673.7
Total intangible assets, net	1,450.4	1,502.4
Customer Relationships [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	1,179.8	1,187.7
Total intangible assets, accumulated amortization	161.2	137.8
Intangible assets subject to amortization, net	1,018.6	1,049.9
Product Technology and Patents [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	210.1	210.0
Total intangible assets, accumulated amortization	44.1	33.5
Intangible assets subject to amortization, net	166.0	176.5
Tradenames and Trademarks [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, cost	249.8	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