CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Net Income	$ 634,422	$ 590,743
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	545,352	476,727
Deferred Income Taxes	120,390	86,550
Uncollectible Expense	27,683	20,579
Pension, SERP and PBOP (Income)/Expense, Net	(6,391)	5,441
Pension and PBOP Contributions	(72,400)	(1,323)
Regulatory Over/(Under) Recoveries, Net	46,835	(58,501)
Amortization	113,624	73,172
Other	(154,065)	(40,764)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(85,261)	(66,460)
Fuel, Materials, Supplies and REC Inventory	77,907	59,332
Taxes Receivable/Accrued, Net	(9,113)	120,717
Accounts Payable	(285,670)	(169,251)
Other Current Assets and Liabilities, Net	(145,868)	(91,587)
Net Cash Flows Provided by Operating Activities	807,445	1,005,375
Investing Activities:
Investments in Property, Plant and Equipment	(1,423,223)	(1,400,198)
Proceeds from Sales of Marketable Securities	253,842	250,589
Purchases of Marketable Securities	(240,729)	(239,698)
Investments in Unconsolidated Affiliates, Net	(100,527)	(12,324)
Other Investing Activities	12,661	11,129
Net Cash Flows Used in Investing Activities	(1,497,976)	(1,390,502)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	0	929,025
Cash Dividends on Common Shares	(402,211)	(366,817)
Cash Dividends on Preferred Stock	(3,759)	(3,759)
Increase/(Decrease) in Notes Payable	753,175	(741,870)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	1,525,000	940,000
Retirement of Long-Term Debt	(1,022,000)	(270,456)
Other Financing Activities	(35,008)	(19,534)
Net Cash Flows (Used in)/Provided by Financing Activities	793,592	444,984
Net Increase in Cash and Restricted Cash	103,061	59,857
Cash and Restricted Cash - Beginning of Period	264,950	117,063
Cash and Restricted Cash - End of Period	368,011	176,920
The Connecticut Light and Power Company
Operating Activities:
Net Income	213,955	236,009
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	167,828	158,152
Deferred Income Taxes	41,886	33,275
Uncollectible Expense	6,614	6,187
Pension, SERP and PBOP (Income)/Expense, Net	3,803	5,886
Pension and PBOP Contributions	(37,880)	0
Regulatory Over/(Under) Recoveries, Net	(22,121)	(45,886)
Amortization of Regulatory (Liabilities)/Assets, Net	47,716	850
Other	(62,137)	(43,064)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(104,262)	(49,800)
Taxes Receivable/Accrued, Net	33,049	31,139
Accounts Payable	(80,007)	(49,574)
Other Current Assets and Liabilities, Net	15,513	(244)
Net Cash Flows Provided by Operating Activities	223,957	282,930
Investing Activities:
Investments in Property, Plant and Equipment	(393,323)	(407,175)
Other Investing Activities	157	146
Net Cash Flows Used in Investing Activities	(393,166)	(407,029)
Financing Activities:
Cash Dividends on Common Shares	(140,200)	(69,500)
Cash Dividends on Preferred Stock	(2,779)	(2,779)
Issuance of Long-Term Debt	425,000	0
Increase in Notes Payable to Eversource Parent	0	208,200
Other Financing Activities	(5,180)	(795)
Net Cash Flows (Used in)/Provided by Financing Activities	276,841	135,126
Net Increase in Cash and Restricted Cash	107,632	11,027
Cash and Restricted Cash - Beginning of Period	99,809	4,971
Cash and Restricted Cash - End of Period	207,441	15,998
NSTAR Electric Company
Operating Activities:
Net Income	204,836	197,857
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	166,710	157,865
Deferred Income Taxes	28,742	26,062
Uncollectible Expense	7,394	6,826
Pension, SERP and PBOP Income, Net	(12,990)	(9,296)
Pension and PBOP Contributions	(10,000)	0
Regulatory Over/(Under) Recoveries, Net	(12,562)	(59,685)
Amortization of Regulatory (Liabilities)/Assets, Net	15,890	46,612
Other	(40,315)	(12,534)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(49,324)	(36,627)
Fuel, Materials, Supplies and REC Inventory	59,256	53,599
Taxes Receivable/Accrued, Net	57,584	5,279
Accounts Payable	(88,729)	(49,881)
Other Current Assets and Liabilities, Net	(80,605)	(113,276)
Net Cash Flows Provided by Operating Activities	245,887	212,801
Investing Activities:
Investments in Property, Plant and Equipment	(426,053)	(447,545)
Other Investing Activities	43	40
Net Cash Flows Used in Investing Activities	(426,010)	(447,505)
Financing Activities:
Cash Dividends on Common Shares	(283,200)	(196,500)
Cash Dividends on Preferred Stock	(980)	(980)
Increase in Notes Payable to Eversource Parent	200	7,800
Increase/(Decrease) in Notes Payable	360,500	131,500
Issuance of Long-Term Debt	300,000	400,000
Retirement of Long-Term Debt	(250,000)	(95,000)
Capital Contributions from Eversource Parent	60,000	0
Other Financing Activities	(5,909)	(4,946)
Net Cash Flows (Used in)/Provided by Financing Activities	180,611	241,874
Net Increase in Cash and Restricted Cash	488	7,170
Cash and Restricted Cash - Beginning of Period	17,410	6,312
Cash and Restricted Cash - End of Period	17,898	13,482
Public Service Company of New Hampshire
Operating Activities:
Net Income	79,309	71,233
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	59,293	49,084
Deferred Income Taxes	(842)	9,193
Uncollectible Expense	3,226	1,255
Regulatory Over/(Under) Recoveries, Net	(6,965)	(31,159)
Amortization of Regulatory (Liabilities)/Assets, Net	44,821	31,673
Other	(14,445)	(5,191)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(3,717)	(3,237)
Fuel, Materials, Supplies and REC Inventory	3,496	2,212
Taxes Receivable/Accrued, Net	9,183	(5,790)
Accounts Payable	(29,320)	8,219
Other Current Assets and Liabilities, Net	(5,736)	(8,673)
Net Cash Flows Provided by Operating Activities	138,303	118,819
Investing Activities:
Investments in Property, Plant and Equipment	(134,256)	(169,239)
Other Investing Activities	270	250
Net Cash Flows Used in Investing Activities	(133,986)	(168,989)
Financing Activities:
Cash Dividends on Common Shares	(210,400)	(22,300)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	350,000	0
Retirement of Long-Term Debt	(282,000)	0
Capital Contributions from Eversource Parent	160,000	0
Increase in Notes Payable to Eversource Parent	2,300	92,300
Other Financing Activities	(2,941)	(43)
Net Cash Flows (Used in)/Provided by Financing Activities	(4,646)	48,352
Net Increase in Cash and Restricted Cash	(329)	(1,818)
Cash and Restricted Cash - Beginning of Period	39,555	36,688
Cash and Restricted Cash - End of Period	$ 39,226	$ 34,870