CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities:
Net Income	$ 510,340	$ 739,068
Adjustments to Reconcile Net Income to Net Cash Flows (Used In)/Provided by Operating Activities:
Depreciation	632,949	583,568
Deferred Income Taxes	155,035	126,970
Uncollectible Expense	24,171	30,032
Pension, SERP and PBOP Income, Net	(46,600)	(80,404)
Pension Contributions	(2,400)	(52,400)
Regulatory Under Recoveries, Net	(112,050)	(226,238)
Amortization	(294,481)	307,357
Cost of Removal Expenditures	(183,552)	(169,863)
Customer Credits Distributed in 2022 at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	0	(64,909)
Payment in 2022 of Withheld Property Taxes	0	(78,446)
Impairment of Offshore Wind Investment	401,000	0
Other	(13,423)	2,530
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	137,819	(176,132)
Taxes Receivable/Accrued, Net	49,201	85,071
Accounts Payable	(489,132)	(83,550)
Other Current Assets and Liabilities, Net	(121,600)	(100,835)
Net Cash Flows (Used In)/Provided by Operating Activities	647,277	841,819
Investing Activities:
Investments in Property, Plant and Equipment	(2,039,512)	(1,549,081)
Proceeds from Sales of Marketable Securities	215,570	168,997
Purchases of Marketable Securities	(194,786)	(152,741)
Investments in Unconsolidated Affiliates	(390,002)	(277,001)
Other Investing Activities	11,055	10,771
Net Cash Flows Used in Investing Activities	(2,397,675)	(1,799,055)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	0	126,282
Cash Dividends on Common Shares	(458,959)	(427,931)
Cash Dividends on Preferred Stock	(3,759)	(3,759)
Decrease in Notes Payable	(589,200)	(1,317,950)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	3,361,000	3,350,000
Retirement of Long-Term Debt	(853,000)	(770,000)
Other Financing Activities	(27,839)	(42,133)
Net Cash Flows Provided by Financing Activities	1,406,638	892,904
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(343,760)	(64,332)
Cash, Cash Equivalents and Restricted Cash - Beginning of Period	521,752	221,008
Cash and Restricted Cash - End of Period	$ 177,992	$ 156,676