NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	$ 420,481	$ 379,579
Deferred Income Taxes	81,402	(56,524)
Uncollectible Expense	30,795	22,863
Pension, SERP and PBOP Income, Net	(28,287)	(18,811)
Regulatory Over Recoveries, Net	126,339	84,461
Cost of Removal Expenditures	(41,385)	(67,151)
Other	28,255	15,840
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(264,738)	(288,984)
Taxes Receivable/Accrued, Net	247,015	288,790
Accounts Payable	(145,387)	(131,367)
Other Current Assets and Liabilities, Net	(141,649)	(196,218)
Net Cash Flows Provided by Operating Activities	1,324,326	1,040,595
Investing Activities:
Investments in Property, Plant and Equipment	(1,009,311)	(1,007,384)
Net Cash Flows Used in Investing Activities	(1,149,943)	(999,230)
Financing Activities:
Cash Dividends on Common Stock	(290,023)	(270,232)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
Issuance of Long-Term Debt	1,502,574	1,201,407
Decrease in Notes Payable	(992,445)	(552,694)
Other Financing Activities	(29,342)	(23,000)
Net Cash Flows (Used In)/Provided by Financing Activities	(82,837)	31,945
Net (Decrease)/Increase in Cash and Restricted Cash	91,546	73,310
Cash and Restricted Cash - Beginning of Period	246,245	127,308
Cash and Restricted Cash - End of Period	337,791	200,618
NSTAR Electric
Operating Activities:
Net Income	165,950	167,175
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	119,337	108,014
Deferred Income Taxes	12,431	(10,197)
Uncollectible Expense	8,299	7,485
Pension, SERP and PBOP Income, Net	(11,511)	(10,161)
Regulatory Over Recoveries, Net	67,682	78,429
Amortization of Regulatory Assets, Net	74,716	52,284
Cost of Removal Expenditures	(6,092)	(16,903)
Other	(22,321)	(7,333)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	111,590	(114,975)
Taxes Receivable/Accrued, Net	54,123	78,295
Accounts Payable	(50,973)	3,771
Other Current Assets and Liabilities, Net	11,458	(24,456)
Net Cash Flows Provided by Operating Activities	534,689	311,428
Investing Activities:
Investments in Property, Plant and Equipment	(381,725)	(367,462)
Net Cash Flows Used in Investing Activities	(381,725)	(367,462)
Financing Activities:
Cash Dividends on Common Stock	0	(436,000)
Cash Dividends on Preferred Stock	(490)	(490)
Issuance of Long-Term Debt	0	800,000
Capital Contributions from Eversource Parent	258,000	100,000
Decrease in Notes Payable	(245,445)	(396,282)
Other Financing Activities	(152)	(9,114)
Net Cash Flows (Used In)/Provided by Financing Activities	11,913	58,114
Net (Decrease)/Increase in Cash and Restricted Cash	164,877	2,080
Cash and Restricted Cash - Beginning of Period	25,944	9,023
Cash and Restricted Cash - End of Period	$ 190,821	$ 11,103