Other Current and Non-Current Assets - Components of Other Current and Non-Current Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Asbestos-related current assets	$ 67.1		$ 64.7
Advance payments and other prepaid expenses	44.5		50.9
Short-term contract asset (See Note 2)	21.8	$ 43.2	0.0
Prepaid income tax	19.6		30.3
Other	10.4		1.5
Other current assets	163.4		147.4
Other employee benefit-related assets	104.7		111.3
Capitalized software costs	35.3		41.9
Environmental-related assets	23.4		24.5
Equity method investments	7.7		6.7
Other	25.7		18.5
Other non-current assets	$ 196.8		$ 202.9