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INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense (benefit)		$ 41.0	$ 47.0	$ 43.6	$ 68.3
Income tax expense, percentage of pre-tax income		13.90%	17.40%	7.40%	14.50%
Effective tax rate		21.00%	35.00%
Provisional income tax expense						$ 317.8
Provisional estimate of minimum tax on foreign earnings		$ 6.4		$ 15.5
Repatriated undistributed foreign earnings	$ 1,600.0
Repatriated cash, cash equivalents and investments	1,400.0
Repatriated note	200.0
Total gross unrecognized tax benefits	$ 74.6	$ 74.6		74.6		$ 65.4
Net decrease of unrecognized tax benefits				$ (9.2)

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