CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities:
Net Income	$ 523,728	$ 493,039
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	339,914	312,955
Deferred Income Taxes	156,976	149,197
Uncollectible Expense	16,387	22,821
Pension, SERP and PBOP Income, Net	(16,938)	(24,563)
Pension Contributions	(1,250)	(1,100)
Regulatory Under Recoveries, Net	(232,350)	(158,964)
Amortization	(2,325)	(76,059)
Cost of Removal Expenditures	(57,337)	(70,514)
Other	(58,687)	(54,486)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(212,171)	(225,609)
Taxes Receivable/Accrued, Net	65,641	284
Accounts Payable	(107,014)	(258,476)
Other Current Assets and Liabilities, Net	(123,262)	(39,368)
Net Cash Flows Provided by/(Used In) Operating Activities	291,312	69,157
Investing Activities:
Investments in Property, Plant and Equipment	(1,149,443)	(977,144)
Proceeds from Sales of Marketable Securities	41,729	64,307
Purchases of Marketable Securities	(37,555)	(56,508)
Investments in Unconsolidated Affiliates	(307,433)	(87,845)
Other Investing Activities	5,850	5,640
Net Cash Flows Used in Investing Activities	(1,446,852)	(1,051,550)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	75,395	0
Cash Dividends on Common Shares	(244,786)	(229,405)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
Increase/(Decrease) in Notes Payable	216,119	(246,700)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	1,350,000	1,550,000
Retirement of Long-Term Debt	0	(400,000)
Other Financing Activities	(23,725)	(27,002)
Net Cash Flows Provided by/(Used In) Financing Activities	1,349,518	623,408
Net Increase/(Decrease) in Cash and Restricted Cash	193,978	(358,985)
Cash and Restricted Cash - Beginning of Period	166,418	521,752
Cash and Restricted Cash - End of Period	$ 360,396	$ 162,767