OTHER CURRENT AND NON-CURRENT ASSETS - Components of Other Current and Non-Current Assets - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Asbestos-related assets	$ 91.0	$ 91.0
Advance payments and other prepaid expenses	46.9	39.6
Current contract assets, net	17.9	19.1
Prepaid income taxes	22.7	29.0
Other	12.3	10.8
Other current assets	190.8	189.5
Other employee benefit-related assets	115.3	113.9
Operating lease right-of-use assets	83.1	87.3
Capitalized software costs	22.2	23.9
Environmental-related assets	8.5	10.6
Equity method investments	11.8	11.7
Other	24.8	24.6
Other non-current assets	$ 265.7	$ 272.0