Business Segment Information (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,953,620		$ 2,846,026		$ 5,748,248	$ 5,827,085
Income Tax Expense (Benefit)	33,634		134,796		54,627	55,821
Consolidated net income	51,732	$ 76,536	392,014	$ 312,299	128,268	704,312
Assets	62,766,297				62,766,297		$ 59,703,396
Utility [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax	2,941,404		2,818,747		5,713,577	5,766,738
Income Tax Expense (Benefit)	113,017		144,489		147,565	78,363
Consolidated net income	443,319		514,498		639,299	912,664
Assets	66,945,968				66,945,968		63,887,038
Corporate and Other [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax	12,227		27,287		34,703	60,358
Income Tax Expense (Benefit)	(79,383)		(9,693)		(92,938)	(22,542)
Consolidated net income	(312,702)		(40,559)		(352,585)	(70,953)
Assets	925,848				925,848		836,598
Eliminations [Member]
Segment Financial Information Abstract
Revenue from Contract with Customer, Excluding Assessed Tax	(11)		(8)		(32)	(11)
Income Tax Expense (Benefit)	0		0		0	0
Consolidated net income	(78,885)		$ (81,925)		(158,446)	$ (137,399)
Assets	$ (5,105,519)				$ (5,105,519)		$ (5,020,240)