NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	$ 1,160,563	$ 1,060,650
Deferred Income Taxes	15,618	343,004
Uncollectible Expense	59,614	55,438
Pension, SERP and PBOP Income, Net	(60,000)	(54,663)
Regulatory Over/(Under) Recoveries, Net	214,614	(476,419)
Cost of Removal Expenditures	(201,665)	(202,167)
Other	90,609	(77,264)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	25,536	(177,806)
Taxes Receivable/Accrued, Net	92,980	89,730
Accounts Payable	(203,268)	(231,898)
Other Current Assets and Liabilities, Net	(228,089)	(142,285)
Net Cash Flows Provided by Operating Activities	3,197,515	1,517,606
Investing Activities:
Investments in Property, Plant and Equipment	(3,175,358)	(3,291,850)
Net Cash Flows Used in Investing Activities	(3,292,783)	(3,323,457)
Financing Activities:
Cash Dividends on Common Stock	(816,429)	(745,221)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
Issuance of Long-Term Debt	2,040,282	4,400,000
(Decrease)/Increase in Notes Payable	(525,293)	(1,278,252)
Other Financing Activities	(30,196)	(55,474)
Net Cash Flows Provided by Financing Activities	334,688	1,842,234
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	239,420	36,383
Cash and Restricted Cash - Beginning of Period	127,308	166,418
Cash, Cash Equivalents and Restricted Cash - End of Period	366,728	202,801
NSTAR Electric
Operating Activities:
Net Income/(Loss)	529,232	502,129
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	330,364	301,831
Deferred Income Taxes	12,724	55,795
Uncollectible Expense	22,176	27,746
Pension, SERP and PBOP Income, Net	(29,734)	(27,053)
Regulatory Over/(Under) Recoveries, Net	115,301	(155,869)
Amortization of Regulatory (Liabilities)/Assets, Net	97,433	120,814
Cost of Removal Expenditures	(53,517)	(39,590)
Other	(13,957)	(25,224)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(160,917)	(152,656)
Taxes Receivable/Accrued, Net	44,410	33,883
Accounts Payable	(44,814)	(83,599)
Other Current Assets and Liabilities, Net	(27,387)	14,030
Net Cash Flows Provided by Operating Activities	821,314	572,237
Investing Activities:
Investments in Property, Plant and Equipment	(1,210,112)	(1,074,260)
Net Cash Flows Used in Investing Activities	(1,210,112)	(1,074,260)
Financing Activities:
Cash Dividends on Common Stock	(436,000)	(643,900)
Cash Dividends on Preferred Stock	(1,470)	(1,470)
Issuance of Long-Term Debt	800,000	600,000
Capital Contributions from Eversource Parent	100,000	375,000
(Decrease)/Increase in Notes Payable	(25,782)	171,653
Other Financing Activities	(9,106)	(6,077)
Net Cash Flows Provided by Financing Activities	427,642	495,206
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	38,844	(6,817)
Cash and Restricted Cash - Beginning of Period	9,023	22,785
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 47,867	$ 15,968