Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net sales	$ 5,343	$ 6,451	$ 16,363	$ 17,694
Cost of sales	3,511	4,307	10,927	11,981
Gross profit	1,832	2,144	5,436	5,713
Selling, general and administrative expenses	(1,334)	(1,388)	(4,212)	(4,284)
Restructuring and impairment costs	(610)	(235)	(783)	(235)
Net financing charges	(58)	(119)	(169)	(302)
Equity income	47	62	110	137
Income (loss) from continuing operations before income taxes	(123)	464	382	1,029
Income tax provision (benefit)	(1)	239	77	394
Income (loss) from continuing operations	(122)	225	305	635
Income from discontinued operations, net of tax (Note 4)	0	4,051	0	4,598
Net income (loss)	(122)	4,276	305	5,233
Income from continuing operations attributable to noncontrolling interests	60	84	115	147
Income from discontinued operations attributable to noncontrolling interests	0	0	0	24
Net income (loss) attributable to Johnson Controls	(182)	4,192	190	5,062
Amounts attributable to Johnson Controls ordinary shareholders
Income (loss) from continuing operations	(182)	141	190	488
Income from discontinued operations	$ 0	$ 4,051	$ 0	$ 4,574
Earnings per share
Basic earnings (loss) per share from continuing operations	$ (0.24)	$ 0.16	$ 0.25	$ 0.54
Basic earnings per share from discontinued operations	0	4.65	0	5.09
Basic earnings (loss) per share	(0.24)	4.81	0.25	5.63
Diluted earnings (loss) per share from continuing operations	(0.24)	0.16	0.25	0.54
Diluted earnings per share from discontinued operations	0	4.63	0	5.07
Diluted earnings (loss) per share	$ (0.24)	$ 4.79	$ 0.25	$ 5.61
Products and Systems [Member]
Net sales	$ 3,919	$ 4,896	$ 11,877	$ 13,058
Cost of sales	2,711	3,380	8,318	9,233
Services [Member]
Net sales	1,424	1,555	4,486	4,636
Cost of sales	$ 800	$ 927	$ 2,609	$ 2,748