Intangibles - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Intangible Assets Disclosure [Line Items]
Trade names	$ 614.5		$ 614.5		$ 582.8
Intangible assets, amortization expense	$ 79.5	$ 9.9	$ 172.9	$ 30.1
Trade Names
Intangible Assets Disclosure [Line Items]
Trade names, useful life			5 years
Backlog
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			14 years
Patents
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			10 years
Customer relationships
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			18 years
Other Intangibles
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			13 years