Derivatives (Narrative) (Details) - USD ($)			3 Months Ended		6 Months Ended		9 Months Ended
	Jan. 26, 2023	Jan. 25, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023	May 09, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Net broker receivable			$ 13,000,000.0		$ 13,000,000.0				$ 10,900,000
Initial margin			4,300,000		4,300,000				5,700,000
Variation margin					8,700,000		$ 5,200,000
Proceeds from issuance of debt		$ 491,000,000
Restricted cash			18,804,000		18,804,000				18,804,000
Loss on extinguishment of debt			(1,429,000)	$ (3,000)	1,429,000	$ 1,812,000
SENIOR UNSECURED NOTES, net of debt issuance costs, discount and premium			$ 3,500,000,000		$ 3,500,000,000				$ 3,100,000,000
Senior Notes | 5.625% senior unsecured notes due 2024
Derivatives, Fair Value [Line Items]
Repayments of long term debt	$ 24,800,000	$ 316,300,000
Interest rate		5.625%
Loss on extinguishment of debt		$ 1,800,000
Senior Notes | 2032 Notes
Derivatives, Fair Value [Line Items]
Interest rate			7.875%		7.875%			7.875%
Face amount								$ 700,000,000
Senior Notes | 2030 Notes
Derivatives, Fair Value [Line Items]
Interest rate		8.875%	8.875%		8.875%
Face amount		$ 500,000,000