Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities of Continuing Operations
Net income attributable to Johnson Controls	$ 251	$ 392
Income attributable to noncontrolling interests	79	79
Net income	330	471
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	409	432
Pension and postretirement benefit income	(3)	(51)
Pension and postretirement contributions	(26)	(76)
Equity in earnings of partially-owned affiliates, net of dividends received	(55)	20
Deferred income taxes	(168)	(97)
Noncash restructuring and impairment charges	691	361
Equity-based compensation	61	57
Other - net	(87)	(64)
Changes in assets and liabilities, excluding acquisitions and divestitures:
Accounts receivable	(360)	(306)
Inventories	(493)	(619)
Other assets	(169)	(206)
Restructuring reserves	(17)	(19)
Accounts payable and accrued liabilities	(155)	489
Accrued income taxes	60	(68)
Cash provided by operating activities from continuing operations	18	324
Investing Activities of Continuing Operations
Capital expenditures	(255)	(260)
Sale of property, plant and equipment	28	35
Acquisition of businesses, net of cash acquired	(89)	(124)
Business divestitures, net of cash divested	0	16
Other - net	2	1
Cash used by investing activities from continuing operations	(314)	(332)
Financing Activities of Continuing Operations
Net proceeds from borrowings with maturities less than three months	1,288	1,517
Proceeds from debt	316	544
Repayments of debt	(536)	(2)
Stock repurchases and retirements	(247)	(1,035)
Payment of cash dividends	(481)	(430)
Employee equity-based compensation withholding taxes	(32)	(49)
Dividends paid to noncontrolling interests	(72)	(118)
Other - net	26	17
Cash provided by financing activities from continuing operations	262	444
Discontinued Operations
Cash used by operating activities	0	(4)
Cash used by discontinued operations	0	(4)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	8	46
Increase (decrease) in cash, cash equivalents and restricted cash	(26)	478
Cash, cash equivalents and restricted cash at beginning of period	2,066	1,342
Cash, cash equivalents and restricted cash at end of period	2,040	1,820
Less: Restricted cash	65	33
Cash and cash equivalents at end of period	$ 1,975	$ 1,787