Quarterly Consolidated Financial Information (Unaudited) (Quarterly Financial Information Disclosure)(Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenue, Net	$ 311.4	$ 301.0	$ 290.3	$ 261.8	$ 320.7	$ 318.5	$ 288.1	$ 257.4	$ 1,164.5	$ 1,184.7	$ 1,120.8
Gross profit	97.7	96.2	82.1	71.3	101.3	97.3	82.2	67.1	347.3	347.9	313.2
Operating income	44.4	31.5	25.6	8.1	43.0	41.8	25.3	14.0	109.6	124.1	97.3
Net Income (Loss) Attributable to Parent	$ 22.3	$ 16.5	$ 12.3	$ (20.2)	$ 26.2	$ 18.5	$ 9.7	$ 1.1	$ 30.9	$ 55.5	$ 40.8
Net income (loss) per share(1)
Net income (loss) per basic share	$ 0.14	$ 0.10	$ 0.08	$ (0.13)	$ 0.16	$ 0.12	$ 0.06	$ 0.01	$ 0.19	$ 0.35	$ 0.26
Net income (loss) per diluted share	$ 0.14	$ 0.10	$ 0.08	$ (0.13)	$ 0.16	$ 0.11	$ 0.06	$ 0.01	$ 0.19	$ 0.34	$ 0.25

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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