PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net Income	$ 1,228,046	$ 1,212,686	$ 916,572
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,103,008	981,380	885,278
Deferred Income Taxes	347,056	257,154	209,812
Uncollectible Expense	60,886	53,461	63,446
Pension, SERP and PBOP (Income)/Expense, Net	(14,693)	12,888	22,000
Pension Contributions	(182,344)	(111,524)	(121,782)
Regulatory Over/(Underrecoveries), Net	(314,211)	(516,411)	(124,870)
Cost of Removal Expenditures	(242,130)	(148,332)	(153,477)
Other	(64,640)	(25,957)	(42,610)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(135,505)	(351,843)	(98,716)
Materials, Supplies and REC Inventory	(1,859)	(15,404)	(8,074)
Taxes Receivable/Accrued, Net	(110,621)	43,819	(16,129)
Accounts Payable	(29,201)	122,567	14,866
Other Current Assets and Liabilities, Net	5,569	(9,591)	(11,603)
Net Cash Flows Provided by Operating Activities	1,962,600	1,682,572	2,009,577
Investing Activities:
Investments in Property, Plant and Equipment	(3,175,080)	(2,942,996)	(2,911,489)
Other Investing Activities	22,178	23,809	24,204
Net Cash Flows Used in Investing Activities	(3,447,374)	(4,129,275)	(3,274,288)
Financing Activities:
Cash Dividends on Common Shares	(805,439)	(744,665)	(663,239)
Issuance of Long-Term Debt	3,230,000	2,760,000	1,520,000
Retirement of Long-Term Debt	(1,142,500)	(327,236)	(801,078)
Repayment of Rate Reduction Bonds	(43,210)	(43,210)	(52,332)
Other Financing Activities	(46,625)	14,273	(1,006)
Net Cash Flows Provided by Financing Activities	1,440,832	2,594,590	1,172,450
Net (Decrease)/Increase in Cash and Restricted Cash	(43,942)	147,887	(92,261)
Cash and Restricted Cash - Beginning of Year	264,950	117,063	209,324
Cash and Restricted Cash - End of Year	221,008	264,950	117,063
Public Service Company of New Hampshire
Operating Activities:
Net Income	150,338	147,312	134,048
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	120,065	100,372	93,737
Deferred Income Taxes	(14,530)	7,337	15,917
Uncollectible Expense	13,113	5,164	6,726
Pension, SERP and PBOP (Income)/Expense, Net	(3,296)	(1,255)	417
Pension Contributions	0	(19,500)	(15,400)
Regulatory Over/(Underrecoveries), Net	32,587	(45,830)	(26,288)
Amortization of Regulatory Assets, Net	86,832	52,804	57,732
Cost of Removal Expenditures	(30,804)	(22,063)	(21,814)
Other	(1,370)	17,221	(6,414)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(32,003)	(33,612)	(210)
Materials, Supplies and REC Inventory	899	(1,872)	1,902
Taxes Receivable/Accrued, Net	3,952	(6,942)	25,374
Accounts Payable	(3,256)	27,270	12,281
Other Current Assets and Liabilities, Net	13,555	(7,738)	(3,573)
Net Cash Flows Provided by Operating Activities	336,082	218,668	274,435
Investing Activities:
Investments in Property, Plant and Equipment	(326,379)	(342,586)	(308,993)
Other Investing Activities	562	982	1,023
Net Cash Flows Used in Investing Activities	(325,817)	(341,604)	(307,970)
Financing Activities:
Cash Dividends on Common Shares	(260,800)	(22,300)	(271,000)
Increase/(Decrease) in Notes Payable to Eversource Parent	64,300	19,300	(30,000)
Issuance of Long-Term Debt	350,000	150,000	300,000
Retirement of Long-Term Debt	(282,000)	0	(150,000)
Repayment of Rate Reduction Bonds	(43,210)	(43,210)	(52,332)
Capital Contributions from Eversource Parent	160,000	25,000	225,000
Other Financing Activities	(2,984)	(2,987)	(4,168)
Net Cash Flows Provided by Financing Activities	(14,694)	125,803	17,500
Net (Decrease)/Increase in Cash and Restricted Cash	(4,429)	2,867	(16,035)
Cash and Restricted Cash - Beginning of Year	39,555	36,688	52,723
Cash and Restricted Cash - End of Year	$ 35,126	$ 39,555	$ 36,688