Equity (Tables)

12 Months Ended

Sep. 30, 2023

Stockholders' Equity Note [Abstract]

Changes in Accumulated Other Comprehensive Income, net of tax

The following table includes changes in AOCI attributable to Johnson Controls (in millions, net of tax):

	Year Ended September 30,
	2023		2022		2021
Foreign currency translation adjustments
Balance at beginning of period	$	(901)	$	(421)	$	(778)
Aggregate adjustment for the period	(69)		(480)		357
Balance at end of period	(970)		(901)		(421)
Realized and unrealized gains (losses) on derivatives
Balance at beginning of period	(11)		(17)		2
Current period changes in fair value	19		20		(3)
Reclassification to income (1)	11		(16)		(14)
Net tax impact	(4)		2		(2)
Balance at end of period	15		(11)		(17)
Pension and postretirement plans
Balance at beginning of period	1		4		—
Reclassification to income	(1)		(3)		(3)
Other changes	—		—		8
Net tax impact	—		—		(1)
Balance at end of period	—		1		4
Accumulated other comprehensive loss, end of period	$	(955)	$	(911)	$	(434)

(1) Refer to Note 11, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives.