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ACCUMULATED OTHER COMPREHENSIVE LOSS - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification to earnings from the unrecognized net defined benefit plan, before tax	$ (9.8)	$ (13.7)	$ (5.7)
Reclassification to earnings from the unrecognized net defined benefit plan, tax	2.6	3.2	1.5
Amortization of net actuarial (losses)	(11.5)	(15.9)	(6.9)
Amortization of net prior service credit	1.7	2.2	1.2
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency (losses) gains related to translation	83.1	(10.3)	(47.3)
Foreign currency (losses) gains related to intra-entity foreign currency transactions	(2.8)	1.1	5.3
Foreign currency (losses) gains related to net investment hedges	(66.2)	6.8	16.6
Derivatives used in Net Investment Hedge, Tax Expense (Benefit)	$ 15.7	$ (1.6)	$ (3.9)

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