CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities:
Net Income	$ 552,668	$ 523,728
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	379,579	339,914
Deferred Income Taxes	(56,524)	156,976
Uncollectible Expense	22,863	16,387
Pension, SERP and PBOP Income, Net	(18,811)	(16,938)
Pension Contributions	(1,250)	(1,250)
Regulatory Over/(Under) Recoveries, Net	84,461	(232,350)
Amortization	455,449	(2,325)
Cost of Removal Expenditures	(67,151)	(57,337)
Other	17,090	(58,687)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(288,984)	(212,171)
Taxes Receivable/Accrued, Net	288,790	65,641
Accounts Payable	(131,367)	(107,014)
Other Current Assets and Liabilities, Net	(196,218)	(123,262)
Net Cash Flows Provided by Operating Activities	1,040,595	291,312
Investing Activities:
Investments in Property, Plant and Equipment	(1,007,384)	(1,149,443)
Proceeds from Sales of Marketable Securities	64,007	41,729
Purchases of Marketable Securities	(61,049)	(37,555)
Investments in Unconsolidated Affiliates	(504)	(307,433)
Other Investing Activities	5,700	5,850
Net Cash Flows Used in Investing Activities	(999,230)	(1,446,852)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	0	75,395
Cash Dividends on Common Shares	(270,232)	(244,786)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
(Decrease)/Increase in Notes Payable	(552,694)	216,119
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	1,201,407	1,350,000
Retirement of Long-Term Debt	(300,051)	0
Other Financing Activities	(23,000)	(23,725)
Net Cash Flows Provided by Financing Activities	31,945	1,349,518
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	73,310	193,978
Cash and Restricted Cash - Beginning of Period	127,308	166,418
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 200,618	$ 360,396