NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities:
Net Income	$ 445,326	$ 368,023
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	289,330	270,704
Deferred Income Taxes	67,557	41,917
Uncollectible Expense	17,135	16,295
Pension and PBOP Contributions	(26,100)	(31,100)
Regulatory (Under)/Over Recoveries, Net	(107,767)	28,024
Cost of Removal Expenditures	(61,660)	(39,333)
Other	(21,409)	(51,913)
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	(291,723)	(124,344)
Fuel, Materials, Supplies and REC Inventory	(19,495)	(42,494)
Taxes Receivable/Accrued, Net	56,519	64,076
Accounts Payable	(68,909)	(181,725)
Other Current Assets and Liabilities, Net	(44,758)	(42,386)
Net Cash Flows Provided by Operating Activities	371,940	411,416
Investing Activities:
Investments in Property, Plant and Equipment	(764,594)	(688,983)
Other Investing Activities	5,976	7,135
Net Cash Flows Used in Investing Activities	(858,247)	(704,517)
Financing Activities:
Cash Dividends on Common Shares	(213,890)	(201,013)
Cash Dividends on Preferred Stock	(1,880)	(1,880)
Increase in Notes Payable	163,350	669,919
Other Financing Activities	(26,087)	(19,666)
Net Cash Flows Provided by/(Used in) Financing Activities	429,888	203,755
Net Decrease in Cash and Restricted Cash	(56,419)	(89,346)
Cash and Restricted Cash - Beginning of Period	221,008	264,950
Cash and Restricted Cash - End of Period	164,589	175,604
NSTAR Electric
Operating Activities:
Net Income	92,739	93,924
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	89,033	82,793
Deferred Income Taxes	26,857	10,309
Uncollectible Expense	4,662	3,868
Pension, SERP and PBOP Expense, Net of Contributions	(13,742)	(6,335)
Pension and PBOP Contributions	(5,000)	0
Regulatory (Under)/Over Recoveries, Net	(10,813)	(3,405)
Amortization of Regulatory Assets, Net	29,345	18,418
Cost of Removal Expenditures	(12,852)	(10,224)
Other	(5,531)	(13,362)
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	2,051	(14,587)
Fuel, Materials, Supplies and REC Inventory	(31,372)	(52,998)
Taxes Receivable/Accrued, Net	45,299	58,353
Accounts Payable	(55,743)	(45,604)
Other Current Assets and Liabilities, Net	34,931	51,445
Net Cash Flows Provided by Operating Activities	189,864	172,595
Investing Activities:
Investments in Property, Plant and Equipment	(234,120)	(215,483)
Other Investing Activities	96	22
Net Cash Flows Used in Investing Activities	(234,024)	(215,461)
Financing Activities:
Cash Dividends on Common Shares	(71,900)	(206,400)
Cash Dividends on Preferred Stock	(490)	(490)
Increase in Notes Payable to Eversource Parent	4,000	1,200
Increase in Notes Payable	112,500	248,500
Other Financing Activities	15	19
Net Cash Flows Provided by/(Used in) Financing Activities	44,125	42,829
Net Decrease in Cash and Restricted Cash	(35)	(37)
Cash and Restricted Cash - Beginning of Period	18,179	17,410
Cash and Restricted Cash - End of Period	$ 18,144	$ 17,373