Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Net sales
Products and systems	[1]	$ 5,996	$ 5,769	$ 11,942	$ 11,354
Services	[1]	1,479	1,498	2,968	2,999
Net sales		7,475	7,267	14,910	14,353
Cost of sales
Products and systems	[1]	4,417	4,087	8,866	8,150
Services	[1]	838	899	1,655	1,808
Cost of sales		5,255	4,986	10,521	9,958
Gross profit		2,220	2,281	4,389	4,395
Selling, general and administrative expenses		(1,588)	(1,726)	(3,005)	(3,296)
Restructuring and impairment costs		0	(99)	(158)	(177)
Net financing charges		(115)	(116)	(231)	(252)
Equity income		44	53	104	108
Income from continuing operations before income taxes		561	393	1,099	778
Income tax provision		78	508	345	481
Income (loss) from continuing operations		483	(115)	754	297
Loss from discontinued operations, net of tax (Note 4)		0	0	0	(34)
Net income (loss)		483	(115)	754	263
Income from continuing operations attributable to noncontrolling interests		45	33	86	73
Income from discontinued operations attributable to noncontrolling interests		0	0	0	9
Net income (loss) attributable to Johnson Controls		438	(148)	668	181
Amounts attributable to Johnson Controls ordinary shareholders
Income (loss) from continuing operations		438	(148)	668	224
Loss from discontinued operations		$ 0	$ 0	$ 0	$ (43)
Earnings (loss) per share
Basic earnings (loss) per share from continuing operations		$ 0.47	$ (0.16)	$ 0.72	$ 0.24
Basic earnings (loss) per share from discontinued operations		0.00	0.00	0.00	(0.05)
Basic earnings (loss) per share		0.47	(0.16)	0.72	0.19
Diluted earnings (loss) per share from continuing operations		0.47	(0.16)	0.72	0.24
Diluted earnings (loss) per share from discontinued operations		0.00	0.00	0.00	(0.05)
Diluted earnings (loss) per share		$ 0.47	$ (0.16)	$ 0.72	$ 0.19

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