STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Comprehensive loss, tax	$ 7.0	$ (5.9)	$ (14.6)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.83	$ 0.78	$ 0.71
Cumulative Effect on Retained Earnings, Tax	$ 4.8
Reclassification from AOCI, Current Period, Tax	$ 0.2

Aggregate dividends paid during the period for each share of common stock outstanding.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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