Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 459	$ 207	$ 480	$ 1,310
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(141)	147	(115)	(708)
Realized and unrealized gains (losses) on derivatives	4	(1)	6	(4)
Pension and postretirement plans	0	0	0	(3)
Other comprehensive income (loss)	(137)	146	(109)	(715)
Total comprehensive income	322	353	371	595
Comprehensive income attributable to noncontrolling interests	74	34	185	79
Comprehensive income attributable to Johnson Controls, Inc.	$ 248	$ 319	$ 186	$ 516