CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2023		349,540,266
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	$ 8,460,876	$ 4,142,515	$ (33,737)	$ (195,682)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	523,728			523,728
Dividends on Common Stock	(250,770)			(250,770)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		1,292,892
Issuance of Common Shares	76,437	$ 6,465	69,972
Capital Stock Expense	(1,042)		(1,042)
Long-Term Incentive Plan Activity	(22,405)		(22,405)
Issuance of Treasury Shares (in shares)		546,256
Issuance of Treasury Shares	40,425		30,190			10,235
Other Comprehensive Income (Loss)	5,203				5,203
Ending balance (in shares) at Mar. 31, 2024		351,379,414
Balance as of End of Period at Mar. 31, 2024	14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	(185,447)
Beginning balance (in shares) at Dec. 31, 2023		349,540,266
Balance as of Beginning of Period at Dec. 31, 2023	14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	(195,682)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	744,772
Other Comprehensive Income (Loss)	5,532				5,500
Ending balance (in shares) at Sep. 30, 2024		363,891,973
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	(175,844)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Par value (in dollars per share)	$ 5
Beginning balance (in shares) at Mar. 31, 2024		351,379,414
Balance as of Beginning of Period at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	(185,447)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	337,221			337,221
Dividends on Common Stock	(252,104)			(252,104)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		2,913,757
Issuance of Common Shares	174,657	$ 14,569	160,088
Capital Stock Expense	(1,863)		(1,863)
Long-Term Incentive Plan Activity	4,245		4,245
Issuance of Treasury Shares (in shares)		272,900
Issuance of Treasury Shares	15,896		10,783			5,113
Other Comprehensive Income (Loss)	(1,047)				(1,047)
Ending balance (in shares) at Jun. 30, 2024		354,566,071
Balance as of End of Period at Jun. 30, 2024	$ 14,818,713	$ 1,820,954	8,710,844	4,496,830	(29,581)	(180,334)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Par value (in dollars per share)	$ 5
Net Income	$ (116,177)			(116,177)
Dividends on Common Stock	(260,119)			(260,119)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		9,086,269
Issuance of Common Shares	588,118	$ 45,431	542,687
Capital Stock Expense	(6,129)		(6,129)
Long-Term Incentive Plan Activity	4,456		4,456
Issuance of Treasury Shares (in shares)		239,633
Issuance of Treasury Shares	16,066		11,576			4,490
Other Comprehensive Income (Loss)	1,376				1,376
Ending balance (in shares) at Sep. 30, 2024		363,891,973
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	(175,844)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Par value (in dollars per share)	$ 5
Par value (in dollars per share)	$ 5
Beginning balance (in shares) at Dec. 31, 2024	366,608,052	366,608,052
Balance as of Beginning of Period at Dec. 31, 2024	$ 15,039,387	$ 1,878,622	9,428,905	3,929,141	(26,472)	(170,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	552,668			552,668
Dividends on Common Stock	(276,229)			(276,229)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(28,230)		(28,230)
Issuance of Treasury Shares (in shares)		699,031
Issuance of Treasury Shares	53,018		39,921			13,097
Other Comprehensive Income (Loss)	2,523				2,523
Ending balance (in shares) at Mar. 31, 2025		367,307,083
Balance as of End of Period at Mar. 31, 2025	$ 15,341,257	$ 1,878,622	9,440,596	4,203,700	(23,949)	(157,712)
Beginning balance (in shares) at Dec. 31, 2024	366,608,052	366,608,052
Balance as of Beginning of Period at Dec. 31, 2024	$ 15,039,387	$ 1,878,622	9,428,905	3,929,141	(26,472)	(170,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,276,705
Other Comprehensive Income (Loss)	$ 3,397				3,400
Ending balance (in shares) at Sep. 30, 2025	375,096,584	375,096,584
Balance as of End of Period at Sep. 30, 2025	$ 16,028,250	$ 1,914,273	9,916,324	4,366,085	(23,075)	(145,357)
Beginning balance (in shares) at Mar. 31, 2025		367,307,083
Balance as of Beginning of Period at Mar. 31, 2025	15,341,257	$ 1,878,622	9,440,596	4,203,700	(23,949)	(157,712)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	354,608			354,608
Dividends on Common Stock	(276,513)			(276,513)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		3,378,765
Issuance of Common Shares	220,789	$ 16,894	203,895
Capital Stock Expense	(2,768)		(2,768)
Long-Term Incentive Plan Activity	8,344		8,344
Issuance of Treasury Shares (in shares)		352,763
Issuance of Treasury Shares	21,917		15,307			6,610
Other Comprehensive Income (Loss)	37				37
Ending balance (in shares) at Jun. 30, 2025		371,038,611
Balance as of End of Period at Jun. 30, 2025	$ 15,665,791	$ 1,895,516	9,665,374	4,279,915	(23,912)	(151,102)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Par value (in dollars per share)	$ 5
Net Income	$ 369,429			369,429
Dividends on Common Stock	(281,379)			(281,379)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		3,751,369
Issuance of Common Shares	250,160	$ 18,757	231,403
Capital Stock Expense	(2,783)		(2,783)
Long-Term Incentive Plan Activity	7,642		7,642
Issuance of Treasury Shares (in shares)		306,604
Issuance of Treasury Shares	20,433		14,688			5,745
Other Comprehensive Income (Loss)	$ 837				837
Ending balance (in shares) at Sep. 30, 2025	375,096,584	375,096,584
Balance as of End of Period at Sep. 30, 2025	$ 16,028,250	$ 1,914,273	$ 9,916,324	$ 4,366,085	$ (23,075)	$ (145,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Par value (in dollars per share)	$ 5