Derivative Financial Instruments (Notes)	3 Months Ended
	Dec. 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 U.S. dollar-denominated 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 we include the changes in their fair values in earnings to offset the currency gains and losses associated with the intercompany loan. The values of our currency swap contracts were liabilities of $1.1 million and $0.2 million at December 31, 2020 and September 30, 2020, respectively, and are included in Other noncurrent liabilities.