Merger Transaction Intangible Assets Acquired (Details) - USD ($) $ in Millions		9 Months Ended
	Sep. 02, 2016	Jun. 30, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Reduction in Goodwill, Acquired During Period		$ 158
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets Acquired	$ 2,080
Other Infinite-Lived Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets Acquired	90
In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets Acquired	60
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 2,280
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years
Technology-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1,580
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years
Other Finite Lived Intangible [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 214
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Building Technologies & Solutions Tyco [Member] | Building Technologies & Solutions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Reduction in Goodwill, Acquired During Period		$ 160