INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]
Deferred tax asset, Russian business	$ 6.6	$ 0.0
Deferred tax asset expected to be utilized	183.2	215.0
Valuation allowance	14.8	7.7
Operating loss carryforwards	59.0
Operating loss carryforwards - indefinite lived	36.5
Operating loss carryforwards, valuation allowance	4.2
U.S. state tax credit carryforwards definite lived	8.8
Valuation allowance state tax credit carryforwards	5.6
Income taxes paid net of refunds	134.2	183.7	$ 159.3
Undistributed earnings of offshore investments	2,300.0
U.S. maximum tax liability	795.0
Unrecognized tax benefits reversing within 12 months	7.0
Uncertain tax positions that impacted the effective rate	88.3	69.8	48.6
Interest and penalties related to uncertain tax positions	25.8	19.5
Provision for income taxes	7.0	$ 4.8	$ 3.9
Russian Business
Schedule of Investments [Line Items]
Loss on investment in Russian business	26.5
Deferred tax asset, Russian business	6.6
Deferred tax asset expected to be utilized	1.6
Valuation allowance	$ 5.0