Consolidated Statements of Financial Position $ in Millions	Jun. 30, 2021 USD ($) $ / shares	Jun. 30, 2021 € / shares	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2020 € / shares
Assets
Cash and cash equivalents	$ 1,450		$ 1,951
Accounts receivable - net	5,668		5,294
Inventories	2,064		1,773
Other current assets	1,128		1,035
Current assets	10,310		10,053
Property, plant and equipment - net	3,111		3,059
Goodwill	18,445		17,932
Other intangible assets - net	5,679		5,356
Investments in partially-owned affiliates	1,016		914
Noncurrent assets held for sale	185		147
Other noncurrent assets	3,389		3,354
Total assets	42,135		40,815
Liabilities and Equity
Short-term debt	265		31
Current portion of long-term debt	196		262
Accounts payable	3,719		3,120
Accrued compensation and benefits	996		838
Deferred revenue	1,649		1,435
Other current liabilities	2,460		2,562
Current liabilities	9,285		8,248
Long-term debt	7,318		7,526
Pension and postretirement benefits	732		1,140
Other noncurrent liabilities	5,803		5,368
Long-term liabilities	13,853		14,034
Commitments and contingencies (Note 22)
Ordinary shares, $0.01 par value	7		8
Ordinary A shares, €1.00 par value	0		0
Preferred shares, $0.01 par value	0		0
Ordinary shares held in treasury, at cost	(1,149)		(1,119)
Capital in excess of par value	17,077		16,865
Retained earnings	2,256		2,469
Accumulated other comprehensive loss	(351)		(776)
Shareholders' equity attributable to Johnson Controls	17,840		17,447
Noncontrolling interests	1,157		1,086
Total equity	18,997		18,533
Total liabilities and equity	$ 42,135		$ 40,815
Ordinary shares, par value | $ / shares	$ 0.01		$ 0.01
Preferred shares, par value | $ / shares	$ 0.01		$ 0.01
Common Class A [Member]
Ordinary shares, par value | € / shares		€ 1.00		€ 1.00