Stock-Based Compensation - Schedule of Performance Share Payout Information (Details) - Performance shares - shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
2018 Performance Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent payout		101.00%
Total shares earned (in shares)		1,341,000
Shares distributed in cash, primarily for tax withholding (in shares)		586,000
2019 Performance Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent payout	106.00%
Total shares earned (in shares)	1,557,000
Shares distributed in cash, primarily for tax withholding (in shares)	684,000