SHAREHOLDERS' EQUITY (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended			32 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Apr. 24, 2014
Stockholders' Equity Note [Abstract]
Authorized share repurchase program (in shares)					8.0
Common stock repurchased and retired (in shares)	0.0	0.0	(2.5)
Value of common stock repurchased and retired	$ 0.0	$ 0.0	$ 64.8
Total repurchased shares under this program (in shares)				1.9
Remaining shares authorized to be purchased (in shares)	6.1			6.1
Stock options exercised (in shares)	0.3	0.1	0.5
Total value of stock options exercised	$ 4.1	$ 3.1	$ 12.1
Foreign currency translation adjustment [Roll Forward]
Beginning balance	(12.1)	(2.3)	(0.5)
Unrealized losses, before Reclassification Adjustments and Tax	(22.4)	(15.7)	(1.8)
Reclassification adjustments into income	0.0	0.0	0.0
Tax benefit (provision)	10.4	5.9	0.0
Net Change in Foreign Currency Translation Adjustment	(12.0)	(9.8)	(1.8)
Ending balance	(24.1)	(12.1)	(2.3)	$ (24.1)
Unrealized gains (losses) on derivative contracts (net of taxes) [Roll Forward]
Beginning balance	(6.9)	(4.2)	0.9
Unrealized (Losses) Gains on Derivatives Arising During Period, before Tax	26.3	(13.9)	(10.2)
Reclassification Adjustment from AOCI on Derivatives, before Tax	5.8	9.7	1.8
Derivatives Qualifying as Hedges, Tax	(12.4)	1.5	3.3
Net Change in Derivatives Qualifying as Hedges	19.7	(2.7)	(5.1)
Ending balance	12.8	(6.9)	(4.2)	12.8
Pension and postretirement benefits (net of taxes) [Roll Forward]
Beginning balance	(473.5)	(436.6)	(365.5)
Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	(61.0)	(125.3)	(142.0)
Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	20.4	65.6	25.5
Deferred tax benefit on pension and postretirement benefits	(15.4)	(22.8)	(45.4)
Net Change in Pension and Other Postretirement Benefit Plans	(25.2)	(36.9)	(71.1)
Ending balance	(498.7)	(473.5)	(436.6)	(498.7)
Accumulated other comprehensive loss [Roll Forward]
Beginning balance	(492.5)	(443.1)	(365.1)
Other Comprehensive Income (Loss), Net Gain (Loss) Recognized, Before Tax	(57.1)	(154.9)	(154.0)
Reclassification Adjustment from AOCI, before Tax	26.2	75.3	27.3
Other Comprehensive Income (Loss), Tax	13.4	30.2	48.7
Other Comprehensive Income (Loss), Net of Tax	(17.5)	(49.4)	(78.0)
Ending balance	$ (510.0)	$ (492.5)	$ (443.1)	$ (510.0)