Consolidated Statements of Income - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Net sales
Products and systems	[1]	$ 25,332	$ 24,099	$ 18,084
Services	[1]	6,068	6,073	2,753
Net sales		31,400	30,172	20,837
Cost of sales
Products and systems	[1]	18,602	17,220	13,323
Services	[1]	3,418	3,613	1,860
Cost of sales		22,020	20,833	15,183
Gross profit		9,380	9,339	5,654
Selling, general and administrative expenses		(6,010)	(6,158)	(4,190)
Restructuring and impairment costs		(263)	(367)	(288)
Net financing charges		(441)	(496)	(289)
Equity income		235	240	174
Income from continuing operations before income taxes		2,901	2,558	1,061
Income tax provision		518	705	197
Income from continuing operations		2,383	1,853	864
Income (loss) from discontinued operations, net of tax (Note 4)		0	(34)	(1,516)
Net income (loss)		2,383	1,819	(652)
Income from continuing operations attributable to noncontrolling interests		221	199	132
Income from discontinued operations attributable to noncontrolling interests		0	9	84
Net income (loss) attributable to Johnson Controls		2,162	1,611	(868)
Amounts attributable to Johnson Controls, Inc. common shareholders
Income from continuing operations		2,162	1,654	732
Income (loss) from discontinued operations		$ 0	$ (43)	$ (1,600)
Earnings (loss) per share
Basic earnings per share from continuing operations		$ 2.34	$ 1.77	$ 1.10
Basic earnings (loss) per share from discontinued operations		0.00	(0.05)	(2.40)
Basic earnings (loss) per share	[2]	2.34	1.72	(1.30)
Diluted earnings per share from continuing operations		2.32	1.75	1.09
Diluted earnings (loss) per share from discontinued operations		0.00	(0.05)	(2.38)
Diluted earnings (loss) per share	[2]	$ 2.32	$ 1.71	$ (1.29)

[1] Products and systems consist of Building Technologies & Solutions and Power Solutions products and systems. Services are Building Technologies & Solutions technical services.

[2] Certain items do not sum due to rounding.