Stockholders' Equity - Share Repurchase Program (Details) - 2017 Share Repurchase program - USD ($) shares in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Aug. 31, 2017
Share Repurchase Program
Amount of shares authorized to be repurchased		$ 500,800,000		$ 500,800,000		$ 1,000,000,000.0
Stock repurchase program, expiration date	Sep. 30, 2025
Number of shares repurchased		1.1	1.5	1.8	3.5
Total cost of share repurchased		$ 10,000,000	$ 20,000,000	$ 20,000,000	$ 40,000,000