PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 10, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Projected benefit obligations:
Balance, January 1		$ 826.7	$ 881.6
Interest cost		27.9	34.8
Service cost		16.6	19.6
Actuarial (gain) loss		42.0	(39.8)
Plan amendments		(39.9)	(12.1)
Plan settlements		(5.1)	0.0
Plan curtailments		(1.0)	0.0
Exchange rate changes		0.1	(1.1)
Benefits paid		(65.3)	(56.3)
Balance, December 31		802.0	826.7	$ 881.6
Plan assets:
Fair value, January 1		550.7	592.0
Actual return		33.8	(0.1)
Employer contributions		22.5	11.3
Plan settlements		(2.5)	0.0
Exchange rate changes		0.0	(0.6)
Benefits paid		(59.9)	(51.9)
Fair value, December 31		544.6	550.7	592.0
Net benefit liabilities		(257.4)	(276.0)
Amounts recognized in Consolidated Balance Sheet:
Accrued liabilities		(32.1)	(31.4)
Other liabilities (long-term)		(225.3)	(244.6)
Net benefit liabilities		(257.4)	(276.0)
Accumulated contributions in excess of (less than) net periodic benefit cost		46.1	30.8
Amounts not yet reflected in net periodic benefit cost:
Actuarial (loss) gain		(361.1)	(335.3)
Prior service credit		57.6	28.5
Total accumulated other comprehensive income (loss)		(303.5)	(306.8)
Net benefit liabilities		(257.4)	(276.0)
Weighted-average assumptions:
Accumulated benefit obligation		764.8	755.1
Amounts that will be amortized from accumulated other comprehensive loss in next fiscal year
Actuarial (loss) gain		(23.8)
Prior service credit		18.3
Total amortization		(5.5)
Plan amendment
Increase (decrease) in defined benefit plan liability	$ (29.5)
Net changes in pension and other postretirement plan assets and benefit obligations recognized in other comprehensive income, net of income taxes	19.2	(5.1)	7.0	(87.3)
Increase (decrease) in deferred tax liability	10.3
Pension benefits [Member]
Projected benefit obligations:
Balance, January 1		760.0	808.0
Interest cost		26.3	31.9	32.7
Service cost		16.3	18.3	14.6
Actuarial (gain) loss		32.8	(40.3)
Plan amendments		0.0	(4.9)
Plan settlements		(2.5)	0.0
Plan curtailments		(1.0)	0.0
Exchange rate changes		0.1	(1.1)
Benefits paid		(59.9)	(51.9)
Balance, December 31		772.1	760.0	808.0
Plan assets:
Fair value, January 1		550.7	592.0
Actual return		33.8	(0.1)
Employer contributions		22.5	11.3
Plan settlements		(2.5)	0.0
Exchange rate changes		0.0	(0.6)
Benefits paid		(59.9)	(51.9)
Fair value, December 31		544.6	550.7	592.0
Net benefit liabilities		(227.5)	(209.3)
Amounts recognized in Consolidated Balance Sheet:
Accrued liabilities		(29.7)	(22.2)
Other liabilities (long-term)		(197.8)	(187.1)
Net benefit liabilities		(227.5)	(209.3)
Accumulated contributions in excess of (less than) net periodic benefit cost		109.4	106.1
Amounts not yet reflected in net periodic benefit cost:
Actuarial (loss) gain		(353.8)	(336.7)
Prior service credit		16.9	21.3
Total accumulated other comprehensive income (loss)		(336.9)	(315.4)
Net benefit liabilities		$ (227.5)	$ (209.3)
Weighted-average assumptions:
Discount rate		4.29%	4.54%
Rate of compensation increase		4.14%	4.15%
Amounts that will be amortized from accumulated other comprehensive loss in next fiscal year
Actuarial (loss) gain		$ (23.1)
Prior service credit		5.0
Total amortization		(18.1)
Other benefits [Member]
Projected benefit obligations:
Balance, January 1		66.7	$ 73.6
Interest cost		1.6	2.9	3.0
Service cost		0.3	1.3	1.1
Actuarial (gain) loss		9.2	0.5
Plan amendments		(39.9)	(7.2)
Plan settlements		(2.6)	0.0
Plan curtailments		0.0	0.0
Exchange rate changes		0.0	0.0
Benefits paid		(5.4)	(4.4)
Balance, December 31		29.9	66.7	73.6
Plan assets:
Fair value, January 1		0.0	0.0
Actual return		0.0	0.0
Employer contributions		0.0	0.0
Plan settlements		0.0	0.0
Exchange rate changes		0.0	0.0
Benefits paid		0.0	0.0
Fair value, December 31		0.0	0.0	$ 0.0
Net benefit liabilities		(29.9)	(66.7)
Amounts recognized in Consolidated Balance Sheet:
Accrued liabilities		(2.4)	(9.2)
Other liabilities (long-term)		(27.5)	(57.5)
Net benefit liabilities		(29.9)	(66.7)
Accumulated contributions in excess of (less than) net periodic benefit cost		(63.3)	(75.3)
Amounts not yet reflected in net periodic benefit cost:
Actuarial (loss) gain		(7.3)	1.4
Prior service credit		40.7	7.2
Total accumulated other comprehensive income (loss)		33.4	8.6
Net benefit liabilities		$ (29.9)	$ (66.7)
Weighted-average assumptions:
Discount rate		3.94%	4.18%
Amounts that will be amortized from accumulated other comprehensive loss in next fiscal year
Actuarial (loss) gain		$ (0.7)
Prior service credit		13.3
Total amortization		$ 12.6
Plan Change Benefit [Member]
Plan amendment
Increase (decrease) in defined benefit plan liability	(39.9)
Net changes in pension and other postretirement plan assets and benefit obligations recognized in other comprehensive income, net of income taxes	25.9
Increase (decrease) in deferred tax liability	14.0
Remeasurement Loss [Member]
Plan amendment
Increase (decrease) in defined benefit plan liability	5.2
Net changes in pension and other postretirement plan assets and benefit obligations recognized in other comprehensive income, net of income taxes	(3.4)
Increase (decrease) in deferred tax liability	(1.8)
Actuarial Loss [Member]
Plan amendment
Increase (decrease) in defined benefit plan liability	5.2
Net changes in pension and other postretirement plan assets and benefit obligations recognized in other comprehensive income, net of income taxes	(3.3)
Increase (decrease) in deferred tax liability	$ (1.9)