Stock-Based Compensation - Share-based Payment Arrangement, Activity (Details) - $ / shares	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restricted stock/units
Number Granted
Equity instruments other than options (in shares)	1,741,102	1,614,493
Weighted Average Grant Date Fair Value
Equity instruments other than options (in dollars per share)	$ 53.52	$ 66.73
Performance shares
Number Granted
Equity instruments other than options (in shares)	370,307	339,191
Weighted Average Grant Date Fair Value
Equity instruments other than options (in dollars per share)	$ 54.13	$ 79.54
Stock options
Number Granted
Equity instruments other than options (in shares)	652,702	570,140
Weighted Average Grant Date Fair Value
Equity instruments other than options (in dollars per share)	$ 13.74	$ 18.21