Income Taxes (Schedule of Deferred Taxes) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016
Deferred tax assets:
Employee benefit accruals	$ 64.5	$ 76.5
Inventory	16.6	13.9
Net operating loss carryforwards	70.7	47.1
Tax credit carryforwards	23.3	14.2
Other, net	41.4	46.4
Deferred tax assets, gross	216.5	198.1
Less: Valuation allowance	(58.2)	(26.9)
Total deferred tax assets	158.3	171.2
Deferred tax liabilities:
Depreciation	(28.6)	(41.6)
Amortization	(349.7)	(371.2)
Other, net	(5.3)	(3.1)
Total deferred tax liabilities	(383.6)	(415.9)
Deferred tax asset (liability) - net	$ (225.3)	$ (244.7)