Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 505	$ 389
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(14)	43
Realized and unrealized losses on derivatives	(1)	(1)
Realized and unrealized gains (losses) on marketable common stock	(2)	3
Pension and postretirement plans	(1)	(9)
Other comprehensive income (loss)	(18)	36
Total comprehensive income	487	425
Comprehensive income attributable to noncontrolling interests	36	29
Comprehensive income attributable to Johnson Controls, Inc.	$ 451	$ 396