Income Taxes (Schedule of Deferred Taxes) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Deferred tax assets:
Employee benefit accruals	$ 42.9	$ 34.9
Inventory	10.0	12.7
Net operating loss carryforwards	69.8	84.5
Tax credit carryforwards	22.6	20.5
Other, net	25.3	26.4
Deferred tax assets, gross	170.6	179.0
Less: Valuation allowance	(45.0)	(80.2)
Total deferred tax assets	125.6	98.8
Deferred tax liabilities:
Depreciation	(14.5)	(19.2)
Amortization	(215.4)	(216.8)
Other, net	(5.6)	(9.1)
Total deferred tax liabilities	(235.5)	(245.1)
Deferred tax liability - net	$ (109.9)	$ (146.3)