COMMON STOCK (Tables)

12 Months Ended

Sep. 30, 2016

Class of Stock Disclosures [Abstract]

Schedule of Stock-Based Compensation Cost

	Years Ended September 30
	2016			2015			2014
Total stock-based compensation cost (pre-tax)	$	23.1		$	25.0		$	18.0
Total income tax benefit		(7.9	)		(7.5	)		(6.5	)
Total stock-based compensation cost, net of tax	$	15.2		$	17.5		$	11.5

Schedule of Weighted Average Fair Value per Share of Stock Options and Related Valuation Assumptions

	Years Ended September 30
	2016	2015	2014
Weighted average fair value per share	$14.07	$12.83	$11.91
Valuation assumptions:
Risk-free interest rate	1.6%	1.6%	1.3%
Expected dividend yield	1.2%	1.4%	1.4%
Expected volatility	33.1%	35.0%	36.1%
Weighted average expected life	4.9 years	4.9 years	4.9 years

Schedule of Transactions under Stock Option Plans

	Weighted					Weighted
	Average			Weighted		Average	Aggregate
	Number of			Average		Remaining	Intrinsic
	Shares			Exercise		Contractual	Value (1)
	(in thousands)			Price		Term	(in millions)
Balance Outstanding at October 1, 2015		1,901		$	34.38
Granted		361			50.98
Exercised		(191	)		32.22
Cancelled/Forfeited		(65	)		42.49
Balance Outstanding at September 30, 2016		2,006		$	37.31	5.9 years	$	49.5
Exercisable at September 30, 2016		1,258		$	32.30	4.5 years	$	37.4
Options Expected to Vest		673		$	45.43	8.2 years	$	11.1

(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $61.98, as reported by the New York Stock Exchange on September 30, 2016. This amount, which changes continuously based on the fair value of our common stock, would have been received by the option holders had all option holders exercised their options as of the balance sheet date.

Schedule of Transactions for Nonvested RSUs

				Weighted
	Number of			Average
	Share Units			Grant Date
	(in thousands)			Fair Value
Nonvested RSUs at October 1, 2015		634		$	41.35
Granted		256			50.41
Vested		(277	)		38.62
Forfeited		(57	)		46.30
Nonvested RSUs at September 30, 2016		556		$	46.32

Schedule of Weighted Average Fair Value per Share of PSUs and Related Valuation Assumptions

	Years Ended September 30
	2016	2015	2014
Weighted average fair value per share	$50.51	$47.82	$47.91
Valuation assumptions:
Risk-free interest rate	1.1%	0.9%	0.5%
Expected dividend yield	0.0%	0.0%	0.0%
Expected volatility	22.3%	23.5%	30.1%

Schedule of Transactions for Nonvested PSUs

				Weighted
	Number of			Average
	Share Units			Grant Date
	(in thousands)			Fair Value
Nonvested PSUs as of October 1, 2015		354		$	47.86
Granted		314			51.43
Vested		(166	)		50.05
Forfeited		(47	)		47.51
Nonvested PSUs at September 30, 2016		455		$	49.50