Segment Information - Disaggregation of Revenue by Geographical Market (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 3,485	$ 3,242	$ 10,471	$ 10,909
Americas
Disaggregation of Revenue [Line Items]
Net sales	1,673	1,440	4,767	4,821
United States
Disaggregation of Revenue [Line Items]
Net sales	1,501	1,298	4,276	4,332
Mexico
Disaggregation of Revenue [Line Items]
Net sales	628	558	1,756	1,783
Other Americas
Disaggregation of Revenue [Line Items]
Net sales	106	64	284	238
EMEA
Disaggregation of Revenue [Line Items]
Net sales	1,215	1,328	3,663	4,568
Germany
Disaggregation of Revenue [Line Items]
Net sales	258	261	737	891
Czech Republic
Disaggregation of Revenue [Line Items]
Net sales	257	276	757	964
Other EMEA
Disaggregation of Revenue [Line Items]
Net sales	1,030	1,144	3,170	3,918
Asia
Disaggregation of Revenue [Line Items]
Net sales	627	516	2,134	1,658
Thailand
Disaggregation of Revenue [Line Items]
Net sales	101	113	370	357
China
Disaggregation of Revenue [Line Items]
Net sales	274	171	1,004	525
Japan
Disaggregation of Revenue [Line Items]
Net sales	59	60	183	253
Other Asia
Disaggregation of Revenue [Line Items]
Net sales	200	177	597	539
Inter-segment elimination
Disaggregation of Revenue [Line Items]
Net sales	(30)	(42)	(93)	(138)
Inter-segment elimination | Americas
Disaggregation of Revenue [Line Items]
Net sales	(562)	(480)	(1,549)	(1,532)
Inter-segment elimination | EMEA
Disaggregation of Revenue [Line Items]
Net sales	(330)	(353)	(1,001)	(1,205)
Inter-segment elimination | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ (7)	$ (5)	$ (20)	$ (16)