NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Adjustments to Reconcile Net Income to Net Cash Flows (Used In)/Provided by Operating Activities:
Depreciation	$ 962,477	$ 885,711
Deferred Income Taxes	78,276	170,752
Uncollectible Expense	40,945	40,753
Pension, SERP and PBOP Income, Net	(64,311)	(120,416)
Pension Contributions	(5,000)	(80,000)
Regulatory Over/(Under) Recoveries, Net	(4,148)	(32,193)
Cost of Removal Expenditures	(237,368)	(284,706)
Other	(114,111)	(34,702)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	6,738	(294,383)
Taxes Receivable/Accrued, Net	177,618	160,260
Accounts Payable	(385,741)	11,821
Other Current Assets and Liabilities, Net	(100,646)	(92,506)
Net Cash Flows (Used In)/Provided by Operating Activities	1,169,153	1,688,904
Investing Activities:
Investments in Property, Plant and Equipment	(3,125,617)	(2,352,743)
Other Investing Activities	(57)	15,245
Net Cash Flows Used in Investing Activities	(3,958,982)	(2,928,140)
Financing Activities:
Cash Dividends on Common Shares	(688,878)	(643,634)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
Issuance of Long-Term Debt	4,340,300	4,045,000
(Decrease)/Increase in Notes Payable to Eversource Parent	87,600	(1,103,950)
Other Financing Activities	(38,189)	(50,191)
Net Cash Flows Provided by Financing Activities	2,448,984	1,620,484
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(340,845)	381,248
Cash, Cash Equivalents and Restricted Cash - Beginning of Period	521,752	221,008
Cash and Restricted Cash - End of Period	180,907	602,256
NSTAR Electric
Operating Activities:
Net Income	433,267	400,260
Adjustments to Reconcile Net Income to Net Cash Flows (Used In)/Provided by Operating Activities:
Depreciation	277,396	269,928
Deferred Income Taxes	72,220	34,025
Uncollectible Expense	12,988	12,159
Pension, SERP and PBOP Income, Net	(31,007)	(41,790)
Pension Contributions	0	(15,000)
Regulatory Over/(Under) Recoveries, Net	(103,903)	(36,203)
Amortization of Regulatory (Liabilities)/Assets, Net	14,923	65,307
Cost of Removal Expenditures	(49,379)	(33,467)
Payment in 2022 of Withheld Property Taxes	0	(76,084)
Other	(11,174)	(8,961)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(76,989)	(67,950)
Taxes Receivable/Accrued, Net	61,773	122,467
Accounts Payable	(60,363)	(55,676)
Other Current Assets and Liabilities, Net	(10,752)	65,609
Net Cash Flows (Used In)/Provided by Operating Activities	529,000	634,624
Investing Activities:
Investments in Property, Plant and Equipment	(1,012,357)	(691,940)
Other Investing Activities	48	143
Net Cash Flows Used in Investing Activities	(1,012,309)	(691,797)
Financing Activities:
Cash Dividends on Common Shares	(327,400)	(215,700)
Cash Dividends on Preferred Stock	(1,470)	(1,470)
Issuance of Long-Term Debt	150,000	850,000
Capital Contributions from Eversource Parent	123,600	50,000
(Decrease)/Increase in Notes Payable to Eversource Parent	0	2,800
Increase/(Decrease) in Notes Payable	209,500	(162,500)
Other Financing Activities	(1,368)	(13,191)
Net Cash Flows Provided by Financing Activities	152,862	509,939
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(330,447)	452,766
Cash, Cash Equivalents and Restricted Cash - Beginning of Period	345,293	18,179
Cash and Restricted Cash - End of Period	$ 14,846	$ 470,945