Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Preferred Stock
Common stock dividends declared per share (usd per share)	$ 0.25
Beginning Period Balance at Sep. 30, 2021	$ 3,650,595,000	$ 1,222,000	$ 2,991,159,000	$ 1,136,478,000	$ (101,789,000)	$ (376,475,000)
Shares outstanding, beginning balance (shares) at Sep. 30, 2021		119,601,766
Shares outstanding, ending balance (shares) at Dec. 31, 2021		119,584,854
Ending Period Balance at Dec. 31, 2021	$ 3,999,630,000	$ 1,221,000	3,013,399,000	1,016,350,000	(97,308,000)	65,968,000
Common stock dividends declared per share (usd per share)	$ 0.25
Beginning Period Balance at Sep. 30, 2022	$ 2,771,477,000	$ 1,232,000	2,903,428,000	215,253,000	(110,892,000)	(736,060,000)	$ 498,516,000
Shares outstanding, beginning balance (shares) at Sep. 30, 2022		120,244,214
Shares outstanding, ending balance (shares) at Dec. 31, 2022		120,222,057
Ending Period Balance at Dec. 31, 2022	$ 3,950,531,000	$ 1,230,000	$ 2,927,903,000	$ 1,420,624,000	$ (106,839,000)	$ (790,903,000)	$ 498,516,000
Preferred stock dividends declared per share (usd per share)	$ 0.48
Stockholders' Equity Disclosure [Rollforward]
Net loss	$ (1,195,424,000)
Dividends, Preferred Stock	(9,947,000)
Ending Period Balance at Mar. 31, 2023	$ 2,771,477,000