Merger Transaction Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		9 Months Ended
	Sep. 02, 2016	Jun. 30, 2017
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ (158)
Cash and cash equivalents	$ 489
Accounts receivable	2,084
Inventories	815
Other current assets	610
Property, plant, and equipment - net	1,219
Intangible assets - net	6,304
Other noncurrent assets	536
Total assets acquired	28,260
Short-term debt	462
Accounts payable	725
Accrued compensation and benefits	312
Other current liabilities	1,444
Long-term debt	6,416
Long-term deferred tax liabilities	847
Long-term pension and postretirement benefits	774
Other noncurrent liabilities	1,436
Total liabilities acquired	12,416
Noncontrolling interests	37
Net assets acquired	15,807
Cash consideration paid to JCI Inc. shareholders	3,864
Total fair value of consideration transferred	19,671
Building Efficiency | Tyco Merger [Member] | Buildings Tyco [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 16,203