Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Mar. 31, 2017		Mar. 31, 2016		Mar. 31, 2017	Mar. 31, 2016
Net sales
Products and systems	[1]	$ 5,448		$ 3,863		$ 10,753	$ 7,683
Services	[1]	1,819		870		3,600	1,746
Net sales		7,267		4,733		14,353	9,429
Cost of sales
Products and systems	[1]	3,893		2,851		7,787	5,691
Services	[1]	1,093		595		2,171	1,194
Cost of sales		4,986		3,446		9,958	6,885
Gross profit		2,281		1,287		4,395	2,544
Selling, general and administrative expenses		(1,726)		(899)		(3,296)	(1,746)
Restructuring and impairment costs		(99)		(60)		(177)	(60)
Net financing charges		(116)		(71)		(252)	(137)
Equity income		53		40		108	82
Income from continuing operations before income taxes		393		297		778	683
Income tax provision		508		41		481	124
Income (loss) from continuing operations		(115)		256		297	559
Loss from discontinued operations, net of tax (Note 5)		0		(725)		(34)	(538)
Net income (loss)		(115)		(469)		263	21
Income from continuing operations attributable to noncontrolling interests		33		38		73	61
Income from discontinued operations attributable to noncontrolling interests		0		23		9	40
Net income (loss) attributable to Johnson Controls		(148)		(530)		181	(80)
Amounts attributable to Johnson Controls ordinary shareholders
Income (loss) from continuing operations		(148)		218		224	498
Loss from discontinued operations		$ 0		$ (748)		$ (43)	$ (578)
Earnings (loss) per share
Basic earnings (loss) per share from continuing operations		$ (0.16)		$ 0.34		$ 0.24	$ 0.77
Basic loss per share from discontinued operations		0.00		(1.15)		(0.05)	(0.89)
Basic earnings (loss) per share		(0.16)	[2]	(0.82)	[2]	0.19	(0.12)
Diluted earnings (loss) per share from continuing operations		(0.16)		0.33		0.24	0.76
Diluted loss per share from discontinued operations		0.00		(1.15)		(0.05)	(0.89)
Diluted earnings (loss) per share		$ (0.16)	[2]	$ (0.81)	[2]	$ 0.19	$ (0.12)

[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