Segment Information - Financial Information Related to Company's Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total net sales	$ 6,068	$ 5,862
Total segment EBITA	792	723
Corporate expenses	(109)	(70)
Amortization of intangible assets	(104)	(118)
Restructuring and impairment costs	(345)	(49)
Net mark-to-market adjustments	3	57
Net financing charges	(67)	(53)
Income before income taxes	170	490
Building Solutions North America
Segment Reporting Information [Line Items]
Total net sales	2,367	2,152
Total segment EBITA	267	250
Building Solutions EMEA/LA
Segment Reporting Information [Line Items]
Total net sales	975	959
Total segment EBITA	75	104
Building Solutions Asia Pacific
Segment Reporting Information [Line Items]
Total net sales	646	675
Total segment EBITA	68	68
Global Products
Segment Reporting Information [Line Items]
Total net sales	2,080	2,076
Total segment EBITA	$ 382	$ 301