Other Current and Non-Current Assets - Components of Other Current and Non-Current Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Asbestos-related current assets	$ 74.5	$ 102.4
Current deferred income taxes	0.0	56.2
Prepaid Taxes	14.3	25.9
Short-term investments	64.9	5.4
Other	50.7	59.9
Other current assets	204.4	249.8
Other employee benefit-related assets	92.9	93.0
Capitalized software costs	28.2	26.8
Environmental related assets	10.8	7.7
Equity method investments	5.6	3.9
Other	15.8	18.4
Other non-current assets	$ 153.3	$ 149.8