Business Segments Information (Business Segments Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 3,932	$ 3,674	$ 3,579	$ 3,337	$ 4,204	$ 4,085	$ 3,934	$ 4,026	$ 14,522	$ 16,249	$ 17,733
Depreciation and amortization									568	573	569
Capital expenditures									447	588	651
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales									594	639	669
Intersegment Eliminations [Member] | Industrial Automation [Member]
Segment Reporting Information [Line Items]
Net sales									(578)	(622)	(650)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									15,116	16,888	18,193
Operating Segments [Member] | Process Management [Member]
Segment Reporting Information [Line Items]
Net sales									7,484	8,516	9,189
Depreciation and amortization									297	276	249
Capital expenditures									181	244	300
Operating Segments [Member] | Industrial Automation [Member]
Segment Reporting Information [Line Items]
Net sales									2,072	2,448	3,004
Depreciation and amortization									50	59	74
Capital expenditures									79	79	71
Operating Segments [Member] | Climate Technologies [Member]
Segment Reporting Information [Line Items]
Net sales									3,949	4,011	4,109
Depreciation and amortization									133	132	132
Capital expenditures									119	134	145
Operating Segments [Member] | Commercial & Residential Solutions [Member]
Segment Reporting Information [Line Items]
Net sales									1,611	1,913	1,891
Depreciation and amortization									44	51	52
Capital expenditures									44	52	49
Corporate, Non-Segment [Member] | Corporate and other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization									44	55	62
Capital expenditures									$ 24	$ 79	$ 86