Business Segments Product Line Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 4,431	$ 4,162	$ 8,592	$ 8,313
Automation Solutions [Member] \| Measurement & Analytical Instrumentation [Member]
Disaggregation of Revenue [Line Items]
Net sales	732	776	1,430	1,571
Automation Solutions [Member] \| Valves, Actuators & Regulators [Member]
Disaggregation of Revenue [Line Items]
Net sales	836	854	1,642	1,767
Automation Solutions [Member] \| Industrial Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	555	494	1,063	1,001
Automation Solutions [Member] \| Systems & Software
Disaggregation of Revenue [Line Items]
Net sales	670	585	1,350	1,222
Operating Segments [Member] \| Automation Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 2,793	$ 2,709	$ 5,485	$ 5,561

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details