OTHER CURRENT AND NON-CURRENT ASSETS - Components of Other Current and Non-Current Assets - USD ($) $ in Millions		Sep. 30, 2023	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Advance payments and other prepaid expenses		$ 44.6	$ 45.0
Current contract assets, net		24.8	26.3
Prepaid income taxes		13.3	25.1
Other		19.7	16.5
Other current assets		102.4	112.9
Other employee benefit-related assets		125.3	119.8
Operating lease right-of-use assets(a)	[1]	83.4	73.8
Deferred income taxes(b)	[2]	71.9	54.7
Equity-method and other investments		45.7	42.9
Capitalized software costs		9.1	12.4
Environmental-related assets		7.0	9.6
Other		31.1	25.9
Other non-current assets		$ 373.5	$ 339.1

[1] The increase in the operating lease right-of-use asset balance from December 31, 2022 to September 30, 2023 is primarily driven by the renewal of an operating facility lease in Irvine, California and by the current period acquisition of Micro-Mode.

[2] The increase in deferred income taxes from December 31, 2022 to September 30, 2023 is primarily due to benefits of $16.5 from valuation allowance reversals on deferred tax assets in Germany.