NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities:
Net Income	$ 493,039	$ 445,326
Adjustments to Reconcile Net Income to Net Cash Flows (Used In)/Provided by Operating Activities:
Depreciation	312,955	289,330
Deferred Income Taxes	149,197	67,557
Uncollectible Expense	22,821	17,135
Pension, SERP and PBOP Income, Net	(24,563)	(40,642)
Pension Contributions	(1,100)	(26,100)
Regulatory Under Recoveries, Net	(158,964)	(107,767)
Cost of Removal Expenditures	(70,514)	(61,660)
Other	(54,486)	(21,409)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(225,609)	(291,723)
Taxes Receivable/Accrued, Net	284	56,519
Accounts Payable	(258,476)	(68,909)
Other Current Assets and Liabilities, Net	(39,368)	(64,253)
Net Cash Flows (Used In)/Provided by Operating Activities	69,157	371,940
Investing Activities:
Investments in Property, Plant and Equipment	(977,144)	(764,594)
Other Investing Activities	5,640	5,976
Net Cash Flows Used in Investing Activities	(1,051,550)	(858,247)
Financing Activities:
Cash Dividends on Common Shares	(229,405)	(213,890)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
(Decrease)/Increase in Notes Payable to Eversource Parent	(246,700)	163,350
Other Financing Activities	(27,002)	(26,087)
Net Cash Flows (Used in)/Provided by Financing Activities	623,408	429,888
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(358,985)	(56,419)
Cash, Cash Equivalents and Restricted Cash - Beginning of Period	521,752	221,008
Cash and Restricted Cash - End of Period	162,767	164,589
NSTAR Electric
Operating Activities:
Net Income	133,813	92,739
Adjustments to Reconcile Net Income to Net Cash Flows (Used In)/Provided by Operating Activities:
Depreciation	90,430	89,033
Deferred Income Taxes	44,403	26,857
Uncollectible Expense	4,697	4,662
Pension, SERP and PBOP Income, Net	(9,886)	(13,742)
Pension Contributions	0	(5,000)
Regulatory Under Recoveries, Net	(58,000)	(10,813)
Amortization of Regulatory (Liabilities)/Assets, Net	22,785	29,345
Cost of Removal Expenditures	(12,893)	(12,852)
Other	(9,921)	(5,531)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(90,684)	2,051
Taxes Receivable/Accrued, Net	11,977	45,299
Accounts Payable	20,249	(55,743)
Other Current Assets and Liabilities, Net	(6,185)	3,559
Net Cash Flows (Used In)/Provided by Operating Activities	140,785	189,864
Investing Activities:
Investments in Property, Plant and Equipment	(318,673)	(234,120)
Other Investing Activities	35	96
Net Cash Flows Used in Investing Activities	(318,638)	(234,024)
Financing Activities:
Cash Dividends on Common Shares	(327,400)	(71,900)
Cash Dividends on Preferred Stock	(490)	(490)
Capital Contributions from Eversource Parent	31,300	0
(Decrease)/Increase in Notes Payable to Eversource Parent	0	4,000
Increase in Notes Payable	147,500	112,500
Other Financing Activities	5	15
Net Cash Flows (Used in)/Provided by Financing Activities	(149,085)	44,125
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(326,938)	(35)
Cash, Cash Equivalents and Restricted Cash - Beginning of Period	345,293	18,179
Cash and Restricted Cash - End of Period	$ 18,355	$ 18,144