INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ 73.9	$ 38.4	$ 90.7	$ 67.3
Income tax expense, percentage of pre-tax income	16.00%	10.80%	6.30%	8.70%
Increase in unrecognized tax benefits	$ 11.1	$ 36.8	$ 11.1	$ 36.8
Excess tax benefits associated with employee equity plans	$ 41.9	$ 47.9	$ 158.9	$ 144.8
Excess tax benefits associated with employee equity plans (in percent)	9.10%	13.50%	11.10%	18.80%
Swiss
Income Tax Contingency [Line Items]
Re-measurement of deferred tax assets	$ 66.4		$ 66.4

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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