Shareholders' Equity - Schedule of Forward Sales Agreement (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Jun. 30, 2025 USD ($) $ / shares shares
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	12,350,452
Net proceeds available | $	$ 1,684,406
Forward price (USD per share) | $ / shares	$ 136.38
Forward Sales Equity Agreement Maturing Quarter Ended December 31, 2025
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	2,184,204
Net proceeds available | $	$ 278,186
Forward price (USD per share) | $ / shares	$ 127.36
Forward Sales Equity Agreement Maturing Quarter Ended March 31, 2026
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	3,627,033
Net proceeds available | $	$ 464,239
Forward price (USD per share) | $ / shares	$ 127.99
Forward Sales Equity Agreement Maturing Quarter June 30, 2026
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	669,043
Net proceeds available | $	$ 89,359
Forward price (USD per share) | $ / shares	$ 133.56
Forward Sales Equity Agreement Maturing Quarter December 31, 2026
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	3,392,352
Net proceeds available | $	$ 474,012
Forward price (USD per share) | $ / shares	$ 139.73
Forward Sales Equity Agreement Maturing Quarter March 31, 2027
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares available (in shares) | shares	2,477,820
Net proceeds available | $	$ 378,610
Forward price (USD per share) | $ / shares	$ 152.80