CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities:
Net Income	$ 919,468	$ 938,883
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	822,197	721,179
Deferred Income Taxes	191,346	156,795
Uncollectible Expense	39,690	31,101
Pension, SERP and PBOP (Income)/Expense, Net	(10,882)	9,153
Pension and PBOP Contributions	(140,000)	(107,985)
Regulatory Over/(Under) Recoveries, Net	87,455	(29,287)
Charges at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	103,583	0
Amortization	158,860	130,687
Other	(229,878)	(69,216)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(158,205)	(193,895)
Fuel, Materials, Supplies and REC Inventory	48,312	21,102
Taxes Receivable/Accrued, Net	44,003	89,759
Accounts Payable	(258,509)	(121,034)
Other Current Assets and Liabilities, Net	(97,167)	(81,033)
Net Cash Flows Provided by Operating Activities	1,520,273	1,496,209
Investing Activities:
Investments in Property, Plant and Equipment	(2,211,136)	(2,101,564)
Proceeds from Sales of Marketable Securities	334,619	386,712
Purchases of Marketable Securities	(313,961)	(391,368)
Proceeds from the Sale of Hingham Water System	0	110,536
Investments in Unconsolidated Affiliates, Net	(245,245)	(31,677)
Other Investing Activities	17,436	17,647
Net Cash Flows Used in Investing Activities	(2,418,287)	(2,009,714)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	0	929,025
Cash Dividends on Common Shares	(603,611)	(555,655)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
Decrease in Notes Payable	(458,325)	(1,174,870)
Repayment of Rate Reduction Bonds	(43,210)	(43,210)
Issuance of Long-Term Debt	3,150,000	2,360,000
Retirement of Long-Term Debt	(1,142,500)	(302,236)
Other Financing Activities	(45,522)	18,030
Net Cash Flows (Used in)/Provided by Financing Activities	851,193	1,225,445
Net (Decrease)/Increase in Cash and Restricted Cash	(46,821)	711,940
Cash and Restricted Cash - Beginning of Period	264,950	117,063
Cash and Restricted Cash - End of Period	218,129	829,003
The Connecticut Light and Power Company
Operating Activities:
Net Income	284,107	356,106
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	253,132	238,735
Deferred Income Taxes	77,147	92,590
Uncollectible Expense	10,183	10,013
Pension, SERP and PBOP (Income)/Expense, Net	4,478	8,629
Pension and PBOP Contributions	(78,913)	(23,200)
Regulatory Over/(Under) Recoveries, Net	(19,404)	(32,051)
Charges at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	103,583	0
Amortization of Regulatory Assets, Net	76,637	37,215
Other	(74,179)	(63,525)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(165,423)	(153,464)
Taxes Receivable/Accrued, Net	45,762	(1,515)
Accounts Payable	(54,226)	(1,976)
Other Current Assets and Liabilities, Net	(12,315)	(68,316)
Net Cash Flows Provided by Operating Activities	450,569	399,241
Investing Activities:
Investments in Property, Plant and Equipment	(563,234)	(609,690)
Other Investing Activities	251	496
Net Cash Flows Used in Investing Activities	(562,983)	(609,194)
Financing Activities:
Cash Dividends on Common Shares	(210,300)	(69,500)
Cash Dividends on Preferred Stock	(4,169)	(4,169)
Issuance of Long-Term Debt	425,000	0
Retirement of Long-Term Debt	(120,500)	0
Capital Contributions from Eversource Parent	0	125,000
Increase in Notes Payable to Eversource Parent	0	172,100
Other Financing Activities	(5,664)	(1,214)
Net Cash Flows (Used in)/Provided by Financing Activities	84,367	222,217
Net (Decrease)/Increase in Cash and Restricted Cash	(28,047)	12,264
Cash and Restricted Cash - Beginning of Period	99,809	4,971
Cash and Restricted Cash - End of Period	71,762	17,235
NSTAR Electric Company
Operating Activities:
Net Income	382,287	363,585
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	251,530	238,232
Deferred Income Taxes	12,905	13,436
Uncollectible Expense	12,477	11,321
Pension, SERP and PBOP Income, Net	(19,627)	(13,714)
Pension and PBOP Contributions	(10,000)	(650)
Regulatory Over/(Under) Recoveries, Net	86,111	(20,047)
Amortization of Regulatory Assets, Net	23,963	69,139
Other	(71,005)	(25,508)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(110,336)	(104,528)
Fuel, Materials, Supplies and REC Inventory	50,227	27,709
Taxes Receivable/Accrued, Net	109,561	55,405
Accounts Payable	(85,431)	(57,300)
Other Current Assets and Liabilities, Net	(15,322)	(54,481)
Net Cash Flows Provided by Operating Activities	617,340	502,599
Investing Activities:
Investments in Property, Plant and Equipment	(675,245)	(655,039)
Other Investing Activities	70	138
Net Cash Flows Used in Investing Activities	(675,175)	(654,901)
Financing Activities:
Cash Dividends on Common Shares	(283,200)	(196,500)
Cash Dividends on Preferred Stock	(1,470)	(1,470)
Increase in Notes Payable to Eversource Parent	3,300	6,300
Decrease in Notes Payable	(57,000)	50,000
Issuance of Long-Term Debt	600,000	400,000
Retirement of Long-Term Debt	(250,000)	(95,000)
Capital Contributions from Eversource Parent	60,000	0
Other Financing Activities	(10,367)	(4,931)
Net Cash Flows (Used in)/Provided by Financing Activities	61,263	158,399
Net (Decrease)/Increase in Cash and Restricted Cash	3,428	6,097
Cash and Restricted Cash - Beginning of Period	17,410	6,312
Cash and Restricted Cash - End of Period	20,838	12,409
Public Service Company of New Hampshire
Operating Activities:
Net Income	123,452	118,384
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	89,462	74,494
Deferred Income Taxes	(13,385)	13,959
Uncollectible Expense	4,381	2,058
Pension, SERP and PBOP (Income)/Expense, Net	(2,664)	(894)
Pension Contributions	0	(19,500)
Regulatory Over/(Under) Recoveries, Net	29,029	(22,203)
Amortization of Regulatory Assets, Net	62,744	39,034
Other	(22,738)	(7,545)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(25,607)	(24,562)
Fuel, Materials, Supplies and REC Inventory	2,040	(301)
Taxes Receivable/Accrued, Net	22,286	1,313
Accounts Payable	(42,654)	(29,388)
Other Current Assets and Liabilities, Net	10,826	4,363
Net Cash Flows Provided by Operating Activities	237,172	149,212
Investing Activities:
Investments in Property, Plant and Equipment	(217,414)	(248,899)
Other Investing Activities	431	1,969
Net Cash Flows Used in Investing Activities	(216,983)	(246,930)
Financing Activities:
Cash Dividends on Common Shares	(235,600)	(22,300)
Repayment of Rate Reduction Bonds	(43,210)	(43,210)
Issuance of Long-Term Debt	350,000	150,000
Retirement of Long-Term Debt	(282,000)	0
Capital Contributions from Eversource Parent	160,000	0
Increase in Notes Payable to Eversource Parent	20,200	2,100
Other Financing Activities	(2,961)	(2,965)
Net Cash Flows (Used in)/Provided by Financing Activities	(33,571)	83,625
Net (Decrease)/Increase in Cash and Restricted Cash	(13,382)	(14,093)
Cash and Restricted Cash - Beginning of Period	39,555	36,688
Cash and Restricted Cash - End of Period	$ 26,173	$ 22,595