Derivative Financial Instruments (Notes)	6 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Financial Instruments In connection with the acquisition of Singer Valve in 2017, we loaned funds to one of our Canadian subsidiaries. Although this intercompany loan has no direct effect on our consolidated financial statements, it creates exposure to currency risk for the Canadian subsidiary. To reduce this exposure, we entered into a U.S. dollar-Canadian dollar swap contract with the Canadian subsidiary and an offsetting Canadian dollar-U.S. dollar swap with a domestic bank. We have not designated these swaps as hedges and the changes in their fair values are included in earnings, where they offset the currency gains and losses associated with the intercompany loan. The values of our currency swap contracts were an asset of $0.8 million and a liability $0.3 million as of March 31, 2020 and September 30, 2019, respectively, and are included in other noncurrent assets and noncurrent liabilities, respectively, in our Condensed Consolidated Balance Sheets.