NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
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)
Regulatory Under Recoveries, Net	(232,350)	(158,964)
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)
Other Investing Activities	5,850	5,640
Net Cash Flows Used in Investing Activities	(1,446,852)	(1,051,550)
Financing Activities:
Cash Dividends on Common Stock	(244,786)	(229,405)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
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
NSTAR Electric
Operating Activities:
Net Income	159,977	133,813
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	96,922	90,430
Deferred Income Taxes	31,812	44,403
Uncollectible Expense	6,109	4,697
Pension, SERP and PBOP Income, Net	(8,954)	(9,886)
Regulatory Under Recoveries, Net	(85,422)	(58,000)
Amortization of Regulatory Assets/(Liabilities), Net	48,392	22,785
Cost of Removal Expenditures	(11,715)	(12,893)
Other	(12,395)	(9,921)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(74,262)	(90,684)
Taxes Receivable/Accrued, Net	(18,223)	11,977
Accounts Payable	13,088	20,249
Other Current Assets and Liabilities, Net	7,316	(6,185)
Net Cash Flows Provided by/(Used In) Operating Activities	152,645	140,785
Investing Activities:
Investments in Property, Plant and Equipment	(394,895)	(318,673)
Other Investing Activities	0	35
Net Cash Flows Used in Investing Activities	(394,895)	(318,638)
Financing Activities:
Cash Dividends on Common Stock	(96,700)	(327,400)
Cash Dividends on Preferred Stock	(490)	(490)
Capital Contributions from Eversource Parent	300,000	31,300
Increase in Notes Payable	53,153	147,500
Other Financing Activities	5	5
Net Cash Flows Provided by/(Used In) Financing Activities	255,968	(149,085)
Net Increase/(Decrease) in Cash and Restricted Cash	13,718	(326,938)
Cash and Restricted Cash - Beginning of Period	22,785	345,293
Cash and Restricted Cash - End of Period	$ 36,503	$ 18,355