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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - STATEMENT OF CASH FLOW (Details) - USD ($) $ in Thousands | 12 Months Ended
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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: |  |  |
Equity in Earnings of Subsidiaries | (22,900) | (14,200) | (14,200)
Deferred Income Taxes | 346,779 | 347,056 | 257,154
Other | (39,192) | (64,640) | (25,957)
Receivables and Unbilled Revenues, Net | (470,593) | (135,505) | (351,843)
Taxes Receivable/Accrued, Net | 18,358 | (110,621) | 43,819
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: |  |  |
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: |  |  |
Issuance of Common Shares, Net of Issuance Costs | 197,058 | 0 | 928,992
Cash Dividends on Common Shares | (860,033) | (805,439) | (744,665)
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
Cash Paid/(Received) During the Year for: |  |  |
Interest | 636,200 | 568,700 | 518,000
Income Taxes | 77,900 | 121,600 | 48,900
Eversource |  |  |
Operating Activities: |  |  |
Net Income | 1,404,875 | 1,220,527 | 1,205,167
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |  |  |
Equity in Earnings of Subsidiaries | (1,565,474) | (1,345,199) | (1,309,630)
Cash Dividends Received from Subsidiaries | 855,600 | 1,037,100 | 485,800
Deferred Income Taxes | 25,823 | 20,293 | (4,667)
Other | 26,455 | 36,910 | 39,940
Receivables and Unbilled Revenues, Net | (9,935) | (3,758) | (14,575)
Taxes Receivable/Accrued, Net | (21,627) | (19,455) | 35,300
Accounts Payable to Subsidiaries | (4,079) | 19,185 | 14,091
Other Current Assets and Liabilities, Net | 35,090 | 8,144 | 21,284
Net Cash Flows Provided by Operating Activities | 746,728 | 973,747 | 472,710
Investing Activities: |  |  |
Capital Contributions to Subsidiaries | (1,499,300) | (1,033,000) | (1,899,340)
Return of Capital from Subsidiaries | 12,000 | 178,800 | 80,000
Increase in Notes Receivable from Subsidiaries | (724,400) | (140,200) | (264,300)
Other Investing Activities | (1,289) | (3,196) | (367)
Net Cash Flows Used in Investing Activities | (2,212,989) | (997,596) | (2,084,007)
Financing Activities: |  |  |
Issuance of Common Shares, Net of Issuance Costs | 197,058 | 0 | 928,992
Cash Dividends on Common Shares | (860,033) | (805,439) | (744,665)
Issuance of Long-Term Debt | 2,800,000 | 1,000,000 | 1,550,000
Retirement of Long-Term Debt | (750,000) | (450,000) | 0
Increase (Decrease) in Notes Payable to Eversource Parent | 99,250 | 288,625 | (170,545)
Other Financing Activities | (19,193) | (9,545) | 46,480
Net Cash Flows Provided by Financing Activities | 1,467,082 | 23,641 | 1,610,262
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash | 821 | (208) | (1,035)
Cash, Cash Equivalents and Restricted Cash - Beginning of Year | 226 | 434 | 1,469
Cash, Cash Equivalents and Restricted Cash - End of Year | 1,047 | 226 | 434
Cash Paid/(Received) During the Year for: |  |  |
Interest | 215,053 | 164,568 | 140,694
Income Taxes | $ (20,992) | $ (51,277) | $ (43,158)

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