CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 493,039	$ 445,326
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	5	5
Changes in Unrealized Gains/(Losses) on Marketable Securities	1,254	(817)
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1,971	1,516
Other Comprehensive Income (Loss), Net of Tax	3,230	704
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)
Comprehensive Income Attributable to Common Shareholders	$ 494,389	$ 444,150