Inventories (Schedule of Inventory) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Oct. 01, 2018	Sep. 30, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 140.4		$ 125.4
Work in process	23.6		21.2
Raw materials, supplies and other	244.3		249.5
Inventories	$ 408.3	$ 396.1	$ 396.1

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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