Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Allowance for Possible Losses and Sales Returns - Accounts Receivable [Member]
Reserves deducted from assets to which they apply:
BALANCE AT BEGINNING OF PERIOD		$ 26.0		$ 31.4		$ 30.1
CHARGED TO COSTS AND EXPENSES		2.1		1.8		1.5
CHARGED TO OTHER ACCOUNTS	[1]	2.2		0.1		8.6
DEDUCTIONS NET OF RECOVERIES	[2]	(3.5)		(7.3)		(8.8)
BALANCE AT END OF PERIOD		26.8		26.0		31.4
Allowance for Inventory Valuation [Member]
Reserves deducted from assets to which they apply:
BALANCE AT BEGINNING OF PERIOD		45.5		42.9		22.0
CHARGED TO COSTS AND EXPENSES		5.8		0.9		4.0
CHARGED TO OTHER ACCOUNTS	[3]			5.7		19.8
DEDUCTIONS NET OF RECOVERIES	[4]	(6.1)		(4.0)		(2.9)
BALANCE AT END OF PERIOD		45.2		45.5		42.9
Valuation Allowance Against Deferred Tax Assets [Member]
Reserves deducted from assets to which they apply:
BALANCE AT BEGINNING OF PERIOD		40.7		28.3		8.9
CHARGED TO COSTS AND EXPENSES		(14.9)		4.0		21.3
CHARGED TO OTHER ACCOUNTS			[3]	11.1	[3]
DEDUCTIONS NET OF RECOVERIES	[5]	1.1		(2.7)		(1.9)
BALANCE AT END OF PERIOD		$ 26.9		$ 40.7		$ 28.3

[1] Reduction of gross revenue for uncollectible health care rental reimbursements, cash discounts and other adjustments in determining net revenue. Also includes the effect of acquired businesses, if any.

[2] Generally reflects the write-off of specific receivables against recorded reserves.

[3] Generally reflects the effect of acquired businesses, if any.

[4] Generally reflects the write-off of specific inventory against recorded reserves.

[5] Primarily reflects write-offs of deferred tax assets against the valuation allowance and other movement of the valuation allowance offset by an opposing change in deferred tax assets.