Consolidated Statements of Financial Position $ in Millions	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2021 € / shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2020 € / shares
Assets
Cash and cash equivalents	$ 1,336		$ 1,951
Accounts receivable - net	5,613		5,294
Inventories	2,057		1,773
Other current assets	992		1,035
Current assets	9,998		10,053
Property, plant and equipment - net	3,228		3,059
Goodwill	18,335		17,932
Other intangible assets - net	5,549		5,356
Investments in partially-owned affiliates	1,066		914
Noncurrent assets held for sale	156		147
Other noncurrent assets	3,558		3,354
Total assets	41,890		40,815
Liabilities and Equity
Short-term debt	8		31
Current portion of long-term debt	226		262
Accounts payable	3,746		3,120
Accrued compensation and benefits	1,008		838
Deferred revenue	1,637		1,435
Other current liabilities	2,473		2,562
Current liabilities	9,098		8,248
Long-term debt	7,506		7,526
Pension and postretirement benefits	628		1,140
Other noncurrent liabilities	5,905		5,368
Long-term liabilities	14,039		14,034
Ordinary shares	7		8
Ordinary A shares	0		0
Preferred shares	0		0
Ordinary shares held in treasury, at cost	(1,152)		(1,119)
Capital in excess of par value	17,116		16,865
Retained earnings	2,025		2,469
Accumulated other comprehensive loss	(434)		(776)
Shareholders’ equity attributable to Johnson Controls	17,562		17,447
Noncontrolling interests	1,191		1,086
Total equity	18,753		18,533
Total liabilities and equity	$ 41,890		$ 40,815
Ordinary shares, par value | $ / shares	$ 0.01		$ 0.01
Ordinary shares authorized | shares	2,000,000,000		2,000,000,000
Ordinary shares issued | shares	737,090,363		753,907,315
Preferred shares authorized | shares	200,000,000		200,000,000
Preferred shares issued | shares	0		0
Preferred shares, par or stated value per share | $ / shares	$ 0.01		$ 0.01
Ordinary shares held in treasury, at cost | shares	28,356,889		27,684,632
Common Class A [Member]
Ordinary shares, par value | € / shares		€ 1.00		€ 1.00
Ordinary shares authorized | shares	40,000		40,000
Ordinary shares issued | shares	0		0