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Business Segment Information Product Line Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 4,570 | $ 4,248 | $ 8,717 | $ 8,064
Automation Solutions [Member] | Measurement & Analytical Instrumentation [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 927 | 860 | 1,785 | 1,632
Automation Solutions [Member] | Valves, Actuators & Regulators [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 937 | 921 | 1,811 | 1,784
Automation Solutions [Member] | Industrial Solutions [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 574 | 484 | 1,116 | 912
Automation Solutions [Member] | Process Control Systems & Solutions [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 572 | 506 | 1,097 | 1,015
Operating Segments [Member] | Automation Solutions [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 3,010 | $ 2,771 | $ 5,809 | $ 5,343

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