EMPLOYEE BENEFIT PLANS - Schedule of Information Regarding Defined Benefit Pension Plans (Details) - Defined benefit pension plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Change in projected benefit obligation:
Beginning of year	$ 118.1	$ 123.1
Service cost	6.8	7.0	$ 6.3
Interest cost	1.2	1.5	2.2
Participant contributions	1.9	1.8
Actuarial loss (gain)	6.5	(1.4)
Benefits paid	(3.7)	(1.3)
Plan amendment	1.9	(2.9)
Settlements	0.0	(4.1)
Currency exchange rate changes and other	(4.0)	(5.6)
End of year	128.7	118.1	123.1
Change in fair value of plan assets:
Beginning of year	75.1	73.8
Actual return on plan assets	1.4	1.3
Employer contributions	6.3	6.1
Participant contributions	1.9	1.8
Settlements	0.0	(4.1)
Benefits paid	(3.7)	(1.3)
Currency exchange rate changes and other	(2.4)	(2.5)
End of year	78.6	75.1	73.8
Funded Status
Projected benefit obligation	(118.1)	(123.1)	(123.1)	$ (128.7)	$ (118.1)
Plan assets at fair value	$ 75.1	$ 73.8	$ 73.8	78.6	75.1
Underfunded status				(50.1)	(43.0)
Accumulated other comprehensive loss, net of tax:
Net actuarial loss				(18.0)	(20.0)
Net prior service (cost) credit				(4.6)	5.1
Deferred income tax benefit				5.0	3.5
Total				(17.6)	(11.4)
Other long-term liabilities
Net amounts recognized on the consolidated balance sheet:
Other long-term liabilities				$ 50.1	$ 43.0