Restructuring and Impairment Costs - Narrative (Details) employee in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2023 USD ($) plant employee
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated to date | employee	14
Number of positions eliminated | employee	12
Number of plants expected to close | plant	28
Number of plants closed | plant	23
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost | $	$ 39
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost adjustment | $	$ 1