Business Segment Information Product Line Information (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 4,147	$ 3,816
Automation Solutions [Member] | Measurement & Analytical Instrumentation [Member]
Disaggregation of Revenue [Line Items]
Net sales	858	772
Automation Solutions [Member] | Valves, Actuators & Regulators [Member]
Disaggregation of Revenue [Line Items]
Net sales	874	863
Automation Solutions [Member] | Industrial Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	542	428
Automation Solutions [Member] | Process Control Systems & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	525	509
Operating Segments [Member] | Automation Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 2,799	$ 2,572