Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Dec. 31, 2025 USD ($)
Goodwill
Balance at beginning of period	$ 3,839
Translation	13
Balance at end of period	3,852
Gross carrying value of goodwill	4,171
Accumulated impairment losses	(319)
Intelligent Devices
Goodwill
Balance at beginning of period	904
Translation	7
Balance at end of period	911
Gross carrying value of goodwill	911
Accumulated impairment losses	0
Software & Control
Goodwill
Balance at beginning of period	2,440
Translation	6
Balance at end of period	2,446
Gross carrying value of goodwill	2,446
Accumulated impairment losses	0
Lifecycle Services
Goodwill
Balance at beginning of period	495
Translation	0
Balance at end of period	495
Gross carrying value of goodwill	814
Accumulated impairment losses	$ (319)