Discontinued Operations, Assets Held for Sale and Divestitures Schedule of Discontinued Operations Income (Loss) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 0.0	$ 85.4	$ 83.1	$ 251.4
Cost of sales	0.0	61.5	62.8	180.8
Gross profit	0.0	23.9	20.3	70.6
Selling, general and administrative	0.1	16.5	17.0	51.4
Other charges	0.0	0.4	0.2	0.4
Total operating expenses	0.1	16.9	17.2	51.8
Income before income taxes	(0.1)	7.0	3.1	18.8
Income tax expense	0.0	2.5	1.2	6.7
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	(0.1)	4.5	1.9	12.1
Gain on sale, net of tax	0.0	0.0	67.9	0.0
Income from discontinued operations	$ (0.1)	$ 4.5	$ 69.8	$ 12.1

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount before tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until its disposal.

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Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of other expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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