Business Segment Information (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax		$ 3,389,100			$ 3,595,522			$ 9,137,348	$ 9,422,607
Income Tax Expense (Benefit)	$ 9,000	215,475			226,997			270,103	282,818
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		645,754	$ 51,732	$ 76,536	669,714	$ 392,014	$ 312,299	774,022	1,374,026
Assets	64,462,049	64,462,049						64,462,049		$ 59,703,396
Intersegment Eliminations [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax		(23)			(20)			(54)	(31)
Income Tax Expense (Benefit)		0			0			0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(77,582)			(81,018)			(236,028)	(218,418)
Assets	(5,080,362)	(5,080,362)						(5,080,362)		(5,020,240)
Utility [Member] | Operating Segments [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax		3,370,138			3,559,240			9,083,715	9,325,977
Income Tax Expense (Benefit)		237,225			225,989			384,790	304,352
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		786,862			754,036			1,426,161	1,666,701
Assets	68,708,628	68,708,628						68,708,628		63,887,038
Corporate Segment and Other Operating Segment [Member] | Operating Segments [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax		18,985			36,302			53,687	96,661
Income Tax Expense (Benefit)		(21,750)			1,008			(114,687)	(21,534)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(63,526)			$ (3,304)			(416,111)	$ (74,257)
Assets	$ 833,783	$ 833,783						$ 833,783		$ 836,598