THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities:
Net (Loss)/Income	$ (434,700)	$ 1,412,400	$ 1,228,000
Adjustments to Reconcile Net (Loss)/Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,305,840	1,194,246	1,103,008
Deferred Income Taxes	85,405	346,779	347,056
Uncollectible Expense	72,468	61,876	60,886
Pension, SERP and PBOP (Income)/Expense, Net	(90,706)	(160,857)	(14,693)
Pension Contributions	(6,860)	(83,148)	(182,344)
Regulatory Over/(Under) Recoveries, Net	(151,548)	(205,294)	(314,211)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	0	(72,041)	81,274
Cost of Removal Expenditures	(315,699)	(303,755)	(242,130)
Other	(53,026)	(39,192)	(64,640)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(124,393)	(470,593)	(135,505)
Taxes Receivable/Accrued, Net	36,357	18,358	(110,621)
Accounts Payable	(287,637)	377,657	(29,201)
Other Current Assets and Liabilities, Net	(66,202)	(45,583)	3,710
Net Cash Flows Provided by Operating Activities	1,646,161	2,401,293	1,962,600
Investing Activities:
Investments in Property, Plant and Equipment	(4,336,849)	(3,441,852)	(3,175,080)
Other Investing Activities	(2,897)	20,420	22,178
Net Cash Flows Used in Investing Activities	(4,870,732)	(4,130,490)	(3,447,374)
Financing Activities:
Cash Dividends on Common Shares	(918,995)	(860,033)	(805,439)
Cash Dividends on Preferred Stock	(7,519)	(7,519)	(7,519)
Increase (Decrease) in Notes Payable To Eversource Parent	695,552	(78,170)	256,125
Issuance of Long-Term Debt	5,198,345	4,045,000	3,230,000
Retirement of Long-Term Debt	(2,008,470)	(1,175,000)	(1,142,500)
Other Financing Activities	(46,466)	(48,185)	(46,625)
Net Cash Flows Provided by/(Used In) Financing Activities	2,869,237	2,029,941	1,440,832
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(355,334)	300,744	(43,942)
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	521,752	221,008	264,950
Cash, Cash Equivalents and Restricted Cash - End of Year	166,418	521,752	221,008
The Connecticut Light and Power Company
Operating Activities:
Net (Loss)/Income	518,733	532,920	401,725
Adjustments to Reconcile Net (Loss)/Income to Net Cash Flows Provided by Operating Activities:
Depreciation	376,904	355,511	338,915
Deferred Income Taxes	184,037	45,381	123,889
Uncollectible Expense	11,675	15,578	13,495
Pension, SERP and PBOP (Income)/Expense, Net	(18,316)	(28,971)	5,295
Pension Contributions	0	0	(98,913)
Regulatory Over/(Under) Recoveries, Net	157,200	(144,793)	(152,775)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	0	(72,041)	81,274
Amortization of Regulatory (Liabilities)/Assets, Net	(500,367)	335,636	99,009
Cost of Removal Expenditures	(80,479)	(71,596)	(95,792)
Other	(16,194)	(25,927)	(10,194)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(100,684)	(256,338)	(75,881)
Taxes Receivable/Accrued, Net	25,633	897	(25,162)
Accounts Payable	(88,040)	207,698	24,895
Other Current Assets and Liabilities, Net	(20,535)	(24,308)	(16,925)
Net Cash Flows Provided by Operating Activities	449,567	869,647	612,855
Investing Activities:
Investments in Property, Plant and Equipment	(1,093,121)	(876,740)	(790,083)
Other Investing Activities	173	591	329
Net Cash Flows Used in Investing Activities	(1,092,948)	(876,149)	(789,754)
Financing Activities:
Cash Dividends on Common Shares	(330,400)	(292,400)	(341,400)
Cash Dividends on Preferred Stock	(5,559)	(5,559)	(5,559)
Increase (Decrease) in Notes Payable To Eversource Parent	457,000	0	0
Issuance of Long-Term Debt	800,000	0	425,000
Retirement of Long-Term Debt	(400,000)	0	(120,500)
Capital Contributions from Eversource Parent	123,500	250,000	200,000
Other Financing Activities	(9,244)	0	(5,663)
Net Cash Flows Provided by/(Used In) Financing Activities	635,297	(47,959)	151,878
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(8,084)	(54,461)	(25,021)
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	20,327	74,788	99,809
Cash, Cash Equivalents and Restricted Cash - End of Year	$ 12,243	$ 20,327	$ 74,788