Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 178	$ 417	$ 562	$ 876
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(179)	174	(136)	(54)
Realized and unrealized gains (losses) on derivatives	(7)	19	(8)	29
Unrealized gains on marketable common stock	3	11	6	8
Pension and postretirement plans	(3)	(3)	(12)	0
Other comprehensive income (loss)	(186)	201	(150)	(17)
Total comprehensive income (loss)	(8)	618	412	859
Comprehensive income attributable to noncontrolling interests	31	37	60	72
Comprehensive income (loss) attributable to Johnson Controls, Inc.	$ (39)	$ 581	$ 352	$ 787

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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