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

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
	Nov. 20, 2020	Nov. 10, 2020	Oct. 23, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Subsequent Event [Line Items]
Dividends declared, in dollars per share				$ 0.2100	$ 0.2025	$ 0.1900
Stock Repurchased During Period, Shares				418,374	1,074,234	2,573,475
Stock Repurchased During Period, Value				$ 5.0	$ 10.0	$ 30.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared			Oct. 23, 2020
Dividends declared, in dollars per share			$ 0.0550
Dividends Payable, Date to be Paid	Nov. 20, 2020
Dividends Payable, Date of Record		Nov. 10, 2020