Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Net sales
Net sales	$ 26,793	$ 25,299	$ 23,668
Cost of sales
Cost of sales	17,822	16,956	15,609
Gross profit	8,971	8,343	8,059
Selling, general and administrative expenses	(6,181)	(5,945)	(5,258)
Restructuring and impairment costs	(1,064)	(721)	(242)
Net financing charges	(281)	(213)	(206)
Equity income	265	246	261
Income from continuing operations before income taxes	1,710	1,710	2,614
Income tax provision (benefit)	(323)	(13)	868
Income from continuing operations	2,033	1,723	1,746
Income from discontinued operations, net of tax (Note 3)	0	0	124
Net income	2,033	1,723	1,870
Income from continuing operations attributable to noncontrolling interests	184	191	233
Net income attributable to Johnson Controls	1,849	1,532	1,637
Amounts attributable to Johnson Controls ordinary shareholders:
Income from continuing operations	1,849	1,532	1,513
Income from discontinued operations	$ 0	$ 0	$ 124
Basic earnings per share attributable to Johnson Controls
Continuing operations (in dollars per share)	$ 2.70	$ 2.20	$ 2.11
Discontinued operations (in dollars per share)	0	0	0.17
Net income (in dollars per share)	2.70	2.20	2.28
Diluted earnings per share attributable to Johnson Controls
Continuing operations (in dollars per share)	2.69	2.19	2.10
Discontinued operations (in dollars per share)	0	0	0.17
Net income (in dollars per share)	$ 2.69	$ 2.19	$ 2.27
Products and systems
Net sales
Net sales	$ 20,251	$ 19,274	$ 17,202
Cost of sales
Cost of sales	14,031	13,533	11,848
Services
Net sales
Net sales	6,542	6,025	6,466
Cost of sales
Cost of sales	$ 3,791	$ 3,423	$ 3,761