Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Net sales
Products and systems	$ 8,292	[1]	$ 8,558	[1]	$ 17,015	[1]	$ 17,163	[1]
Services	906	[1]	909	[1]	1,807	[1]	1,801	[1]
Net sales	9,198		9,467		18,822		18,964
Cost of sales
Products and systems	7,004	[1]	7,406	[1]	14,410	[1]	14,783	[1]
Services	621	[1]	589	[1]	1,230	[1]	1,203	[1]
Cost of sales	7,625		7,995		15,640		15,986
Gross profit	1,573		1,472		3,182		2,978
Selling, general and administrative expenses	(975)		(952)		(1,980)		(1,949)
Net financing charges	(69)		(56)		(140)		(111)
Equity income	82		73		184		185
Income from continuing operations before income taxes	611		537		1,246		1,103
Income tax provision	132		101		250		204
Net income from continuing operations	479		436		996		899
Income (loss) from discontinued operations, net of tax (Note 4)	78		(143)		107		(101)
Net income	557		293		1,103		798
Income from continuing operations attributable to noncontrolling interests	27		26		63		56
Income from discontinued operations attributable to noncontrolling interests	1		6		4		12
Net income attributable to Johnson Controls, Inc.	529		261		1,036		730
Amounts attributable to Johnson Controls, Inc. common shareholders
Income from continuing operations	452		410		933		843
Income (loss) from discontinued operations	$ 77		$ (149)		$ 103		$ (113)
Earnings (loss) per share
Basic earnings per share from continuing operations	$ 0.69		$ 0.62		$ 1.42		$ 1.26
Basic earnings (loss) per share from discontinued operations	$ 0.12		$ (0.22)		$ 0.16		$ (0.17)
Basic earnings per share	$ 0.81	[2]	$ 0.39	[2]	$ 1.57	[2]	$ 1.09	[2]
Diluted earnings per share from continuing operations	$ 0.68		$ 0.61		$ 1.40		$ 1.25
Diluted earnings (loss) per share from discontinued operations	$ 0.12		$ (0.22)		$ 0.15		$ (0.17)
Diluted earnings per share	$ 0.80	[2]	$ 0.39	[2]	$ 1.56	[2]	$ 1.08	[2]

[1] Products and systems consist of Automotive Experience and Power Solutions products and systems and Building Efficiency installed systems. Services are Building Efficiency technical services.

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