Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Statement of Comprehensive Income [Abstract]
Net income	$ 1,297	$ 1,311	$ 1,532
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(20)	(222)	(110)
Realized and unrealized gains (losses) on derivatives	(5)	39	(47)
Unrealized gains (losses) on marketable common stock	2	(1)	3
Pension and postretirement plans	(16)	(8)	4
Other comprehensive loss	(39)	(192)	(150)
Comprehensive income	1,258	1,119	1,382
Comprehensive income attributable to noncontrolling interests	120	126	116
Comprehensive income attributable to Johnson Controls, Inc.	$ 1,138	$ 993	$ 1,266