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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |  |  |
Equity in (Earnings)/Losses of Subsidiaries | $ (51,900) | $ (15,500) | $ (22,900)
Deferred Income Taxes | 435,889 | 85,405 | 346,779
Loss on Pending Sale of Aquarion | 297,000 | 0 | 0
Other | (102,450) | (53,026) | (39,192)
Receivables and Unbilled Revenues, Net | (432,620) | (124,393) | (470,593)
Taxes Receivable/Accrued, Net | 55,502 | 36,357 | 18,358
Other Current Assets and Liabilities, Net | 19,529 | (66,202) | (45,583)
Net Cash Flows Provided by Operating Activities | 2,159,737 | 1,646,161 | 2,401,293
Investing Activities: |  |  |
Other Investing Activities | (13,365) | (2,897) | 20,420
Net Cash Flows Used in Investing Activities | (4,535,664) | (4,870,732) | (4,130,490)
Financing Activities: |  |  |
Issuance of Common Shares, Net of Issuance Costs | 989,447 | 0 | 197,058
Cash Dividends on Common Shares | (1,001,488) | (918,995) | (860,033)
Issuance of Long-Term Debt | 4,501,623 | 5,198,345 | 4,045,000
Retirement of Long-Term Debt | (1,949,995) | (2,008,470) | (1,175,000)
Other Financing Activities | (57,082) | (46,466) | (48,185)
Net Cash Flows Provided by Financing Activities | 2,336,817 | 2,869,237 | 2,029,941
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash | (39,110) | (355,334) | 300,744
Cash, Cash Equivalents and Restricted Cash - Beginning of Year | 166,418 | 521,752 | 221,008
Cash, Cash Equivalents and Restricted Cash - End of Year | 127,308 | 166,418 | 521,752
Cash Paid/(Received) During the Year for: |  |  |
Interest | 1,014,400 | 783,200 | 636,200
Income Taxes | (69,600) | 39,200 | 77,900
Eversource |  |  |
Operating Activities: |  |  |
Net Income/(Loss) | 811,653 | (442,240) | 1,404,875
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |  |  |
Equity in (Earnings)/Losses of Subsidiaries | (1,359,297) | 312,040 | (1,565,474)
Cash Dividends Received from Subsidiaries | 1,273,700 | 1,027,400 | 855,600
Deferred Income Taxes | (99,692) | (22,256) | 25,823
Loss on Pending Sale of Aquarion | 297,000 | 0 | 0
Other | 57,469 | (12,834) | 26,455
Receivables and Unbilled Revenues, Net | (40,129) | (6,853) | (9,935)
Taxes Receivable/Accrued, Net | 22,464 | (80,968) | (21,627)
Accounts Payable to Subsidiaries | 7,275 | 4,521 | (4,079)
Other Current Assets and Liabilities, Net | 58,572 | 35,357 | 35,090
Net Cash Flows Provided by Operating Activities | 1,029,015 | 814,167 | 746,728
Investing Activities: |  |  |
Capital Contributions to Subsidiaries | (2,026,500) | (1,369,700) | (1,499,300)
Return of Capital from Subsidiaries | 17,000 | 438,000 | 12,000
Increase/(Decrease) in Notes Receivable from Subsidiaries | 201,500 | (1,578,100) | (724,400)
Other Investing Activities | 0 | 147,567 | (1,289)
Net Cash Flows Used in Investing Activities | (1,808,000) | (2,362,233) | (2,212,989)
Financing Activities: |  |  |
Issuance of Common Shares, Net of Issuance Costs | 989,447 | 0 | 197,058
Cash Dividends on Common Shares | (1,001,488) | (918,995) | (860,033)
Issuance of Long-Term Debt | 2,400,000 | 3,350,000 | 2,800,000
Retirement of Long-Term Debt | (1,350,000) | (1,200,000) | (750,000)
Increase (Decrease) in Notes Payable to Eversource Parent | (233,894) | 329,705 | 99,250
Other Financing Activities | (24,539) | (13,076) | (19,193)
Net Cash Flows Provided by Financing Activities | 779,526 | 1,547,634 | 1,467,082
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash | 541 | (432) | 821
Cash, Cash Equivalents and Restricted Cash - Beginning of Year | 615 | 1,047 | 226
Cash, Cash Equivalents and Restricted Cash - End of Year | 1,156 | 615 | 1,047
Cash Paid/(Received) During the Year for: |  |  |
Interest | 483,101 | 366,645 | 215,053
Income Taxes | $ 443 | $ 23,984 | $ (20,992)

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