THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246	1,103,008	981,380
Deferred Income Taxes	346,779	347,056	257,154
Uncollectible Expense	61,876	60,886	53,461
Pension, SERP and PBOP (Income)/Expense, Net	(160,857)	(14,693)	12,888
Pension Contributions	(83,148)	(182,344)	(111,524)
Regulatory Under Recoveries, Net	(205,294)	(314,211)	(516,411)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(72,041)	81,274	0
Cost of Removal Expenditures	(303,755)	(242,130)	(148,332)
Other	(39,192)	(64,640)	(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Accounts Payable	377,657	(29,201)	122,567
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)	(3,175,080)	(2,942,996)
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Cash Dividends on Preferred Stock	(7,519)	(7,519)	(7,519)
Proceeds from (Repayments of) Short-Term Debt	(78,170)	256,125	13,955
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
The Connecticut Light and Power Company
Operating Activities:
Net Income	532,920	401,725	457,934
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	355,511	338,915	320,709
Deferred Income Taxes	45,381	123,889	144,527
Uncollectible Expense	15,578	13,495	12,882
Pension, SERP and PBOP (Income)/Expense, Net	(28,971)	5,295	11,372
Pension Contributions	0	(98,913)	(23,200)
Regulatory Under Recoveries, Net	(144,793)	(152,775)	(279,941)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(72,041)	81,274	0
Amortization of Regulatory Assets, Net	335,636	99,009	58,412
Cost of Removal Expenditures	(71,596)	(95,792)	(57,343)
Other	(25,927)	(10,194)	(57,870)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(256,338)	(75,881)	(126,638)
Taxes Receivable/Accrued, Net	897	(25,162)	(12,014)
Accounts Payable	207,698	24,895	(17,028)
Other Current Assets and Liabilities, Net	(24,308)	(16,925)	(34,729)
Net Cash Flows Provided by Operating Activities	869,647	612,855	397,073
Investing Activities:
Investments in Property, Plant and Equipment	(876,740)	(790,083)	(833,973)
Other Investing Activities	591	329	573
Net Cash Flows Used in Investing Activities	(876,149)	(789,754)	(833,400)
Financing Activities:
Cash Dividends on Common Shares	(292,400)	(341,400)	(69,500)
Cash Dividends on Preferred Stock	(5,559)	(5,559)	(5,559)
Proceeds from (Repayments of) Short-Term Debt	0	0	(63,800)
Issuance of Long-Term Debt	0	425,000	400,000
Retirement of Long-Term Debt	0	(120,500)	0
Capital Contributions from Eversource Parent	250,000	200,000	275,000
Other Financing Activities	0	(5,663)	(4,976)
Net Cash Flows Provided by Financing Activities	(47,959)	151,878	531,165
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	(54,461)	(25,021)	94,838
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	74,788	99,809	4,971
Cash, Cash Equivalents and Restricted Cash - End of Year	$ 20,327	$ 74,788	$ 99,809