Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities of Continuing Operations
Net income from continuing operations attributable to Johnson Controls	$ 190	$ 488
Income from continuing operations attributable to noncontrolling interests	115	147
Income from discontinued operations attributable to noncontrolling interests	0	24
Income from continuing operations	305	635
Adjustments to reconcile net income from continuing operations to cash provided by operating activities:
Depreciation and amortization	616	625
Pension and postretirement benefit expense (income)	42	(85)
Pension and postretirement contributions	(43)	(51)
Equity in earnings of partially-owned affiliates, net of dividends received	9	6
Deferred income taxes	(148)	382
Non-cash restructuring and impairment charges	582	235
Equity-based compensation	61	66
Other - net	(38)	42
Changes in assets and liabilities, excluding acquisitions and divestitures:
Accounts receivable	428	(494)
Inventories	(205)	(289)
Other assets	(120)	(62)
Restructuring reserves	58	(84)
Accounts payable and accrued liabilities	(731)	(36)
Accrued income taxes	683	(179)
Cash provided by operating activities from continuing operations	1,499	711
Investing Activities of Continuing Operations
Capital expenditures	(347)	(401)
Sale of property, plant and equipment	98	15
Acquisition of businesses, net of cash acquired	(59)	(16)
Business divestitures, net of cash divested	0	12
Proceeds from equity swap	0	14
Changes in long-term investments	(1)	13
Cash used by investing activities from continuing operations	(309)	(363)
Financing Activities of Continuing Operations
Increase (decrease) in short-term debt - net	1,312	(1,286)
Repayment of long-term debt	(505)	(2,333)
Debt financing costs	(4)	0
Stock repurchases and retirements	(1,467)	(5,122)
Payment of cash dividends	(596)	(712)
Proceeds from the exercise of stock options	42	111
Employee equity-based compensation withholding taxes	(33)	(26)
Dividends paid to noncontrolling interests	(67)	(132)
Other - net	2	0
Cash used by financing activities from continuing operations	(1,316)	(9,500)
Cash Provided (Used) by Operating Activities, Discontinued Operations	(255)	117
Cash Provided by Investing Activities, Discontinued Operations	0	12,580
Cash Used by Financing Activities, Discontinued Operations	(113)	(35)
Net Cash Provided (Used) by Discontinued Operations	(368)	12,662
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	28	(24)
Change in cash held for sale	0	15
Increase (decrease) in Cash, Cash Equivalents and Restricted Cash	(466)	3,501
Cash, cash equivalents and restricted cash at beginning of period	2,821	200
Cash, cash equivalents and restricted cash at end of period	2,355	3,701
Less: Restricted Cash	13	16
Cash and cash equivalents at end of period	$ 2,342	$ 3,685