Restructuring and Impairment Costs -Narrative (Details) employee in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2022 USD ($) employee plant	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 60	$ 115
Restructuring and impairment costs	$ 25	21	$ 238
Number of positions eliminated to date | employee	13
Number of positions eliminated | employee	12
Number of plants expected to close | plant	25
Number of plants closed | plant	18
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 25
Restructuring and related cost, expected cost adjustment	10
Restructuring reserve, accrual adjustment	1
Restructuring reserve	18	25
Payments for restructuring	6
2022 Restructuring Plan | Employee Severance and Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, accrual adjustment	0
Restructuring reserve	19	25
Payments for restructuring	6
2021 restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, accrual adjustment	3	16
Restructuring reserve	3	22	27
Payments for restructuring	16	5
2021 restructuring plan | Employee Severance and Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		27
Restructuring reserve, accrual adjustment	1
Restructuring reserve	5	22	27
Payments for restructuring	16	5
2021 restructuring plan | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		23
2021 restructuring plan | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		3
2021 restructuring plan | Asia
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		1
2020 restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, accrual adjustment	15	5	20
Restructuring reserve	34	77	169
Restructuring and impairment costs			205
Payments for restructuring	28	87
2020 restructuring plan | Employee Severance and Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, accrual adjustment	7	6
Restructuring reserve	40	75	168
Payments for restructuring	28	$ 87
2020 restructuring plan | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs			175
2020 restructuring plan | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs			20
2020 restructuring plan | Asia
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs			$ 10
Restructuring plan 2019, 2018 & 2017
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	7
2019 restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	2
2018 restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	1
2017 restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 2