RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2015	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Settlement loss					$ (9.6)
Special termination benefits		$ (3.2)
Accumulated Benefit Obligation
Accumulated benefit obligation	$ 296.7			326.3	296.7
Defined Contribution Savings Plans
Defined contribution savings plans expense				26.8	17.4	15.0
Master Defined Benefit Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Lump sum payments	42.3
Settlement loss					(9.6)
Special termination benefits		(2.4)				(2.4)
Net actuarial gains (losses) included in Accumulated Other Comprehensive Income (Loss)	(79.3)			(85.7)	(79.3)
Prior service (credits) costs included in Accumulated Other Comprehensive Income (Loss)	1.0			0.8	1.0
Pension items in AOCI, aggregate tax effect	30.0			32.2	30.0
Estimated net actuarial loss that will be amortized over the next fiscal year				6.1
Estimated prior service cost that will be amortized over the next fiscal year				0.2
Retirement plans (benefit) cost				7.7	18.7	$ 8.9
Accumulated Benefit Obligation
Accumulated benefit obligation	$ 296.7			$ 326.3	296.7
Plan Assets
Equity securities of one entity, maximum percentage of portfolio				10.00%
Cash Flows
Employer contributions				$ 31.0	$ 0.9
Postretirement Health Care Plan
Discount rate for expense				4.40%	4.50%	5.00%
Discount rate for obligation	4.40%		4.50%	3.70%	4.40%	4.50%
Postretirement Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Special termination benefits		$ (0.8)	$ 1.3
Net actuarial gains (losses) included in Accumulated Other Comprehensive Income (Loss)	$ 2.4			$ 5.9	$ 2.4
Prior service (credits) costs included in Accumulated Other Comprehensive Income (Loss)	(1.4)			(0.5)	(1.4)
Pension items in AOCI, aggregate tax effect	$ 1.5			2.4	1.5
Estimated net actuarial loss that will be amortized over the next fiscal year				0.4
Estimated prior service cost that will be amortized over the next fiscal year				(0.4)
Retirement plans (benefit) cost				0.0	(0.2)	$ (0.2)
Cash Flows
Employer contributions				$ 1.5	$ 0.2
Postretirement Health Care Plan
Discount rate for expense				3.50%	3.70%	4.10%
Discount rate for obligation	3.50%		3.70%		3.50%	3.70%
Effect of one-percentage-point increase/decrease on service and interest costs				$ 0.1
Effect of one-percentage-point increase on service and benefit obligation				1.4
Effect of one-percentage-point decrease on service and benefit obligation				1.3
Expected employer contributions required in next year				1.7
Defined benefit plan estimated future employer contributions in next fiscal, per year, thereafter				$ 2.0
Postretirement Health Care Plan [Member] | Minimum [Member]
Postretirement Health Care Plan
Discount rate for obligation				2.90%
Health care cost trend rate				5.25%
Ultimate health care cost trend rate				4.50%
Postretirement Health Care Plan [Member] | Maximum [Member]
Postretirement Health Care Plan
Discount rate for obligation				3.00%
Health care cost trend rate				9.00%
Ultimate health care cost trend rate				5.00%
Master Plan [Member]
Accumulated Benefit Obligation
Accumulated benefit obligation	$ 275.3			$ 300.7	$ 275.3
International Plans [Member]
Accumulated Benefit Obligation
Accumulated benefit obligation	16.3			20.3	16.3
Supplemental Executive Plan [Member]
Accumulated Benefit Obligation
Accumulated benefit obligation	$ 5.1			$ 5.3	$ 5.1