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COMMITMENTS AND CONTINGENCIES - Schedule of Guarantees and Indemnifications (Details) $ in Millions | Sep. 30, 2024 USD ($)
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Guarantor Obligations [Line Items] |
Maximum Exposure | $ 850.0
Eversource Investment LLC | Letters of Credit |
Guarantor Obligations [Line Items] |
Maximum Exposure | 5.3
Maximum borrowing capacity | $ 25.0
North East Offshore, Revolution Wind, LLC and South Fork Wind, LLC |
Guarantor Obligations [Line Items] |
Ownership interest (percent) | 50.00%
Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC |
Guarantor Obligations [Line Items] |
Maximum Exposure | $ 1,620.0
South Fork Wind, LLC |
Guarantor Obligations [Line Items] |
Maximum Exposure | $ 7.1
Ownership interest (percent) | 50.00%
South Fork Class B Member, LLC |
Guarantor Obligations [Line Items] |
Ownership interest (percent) | 50.00%
Performance Guarantee | Eversource Investment Service Company LLC |
Guarantor Obligations [Line Items] |
Maximum Exposure | $ 100.0
Tax Equity | Eversource TEI LLC |
Guarantor Obligations [Line Items] |
Maximum Exposure | 50.0
North East Offshore, LLC, Revolution Wind, LLC, and TurbineCo, LLC | Construction-related purchase agreements with third-party contractors |
Guarantor Obligations [Line Items] |
Maximum Exposure | 455.3
Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC | Funding and indemnification obligations of North East Offshore LLC |
Guarantor Obligations [Line Items] |
Maximum Exposure | 351.1
Eversource Investment LLC | Letters Of Credit Guarantee |
Guarantor Obligations [Line Items] |
Maximum Exposure | 5.3
Eversource TEI LLC | South Fork Wind Tax Equity |
Guarantor Obligations [Line Items] |
Maximum Exposure | 50.0
South Fork Wind, LLC | Power Purchase Guarantee |
Guarantor Obligations [Line Items] |
Maximum Exposure | 7.1
Various Eversource subsidiaries | Surety Bond |
Guarantor Obligations [Line Items] |
Maximum Exposure | 31.1
North East Offshore, Revolution Wind, LLC and South Fork Wind, LLC | Performance Guarantee |
Guarantor Obligations [Line Items] |
Maximum Exposure | 1,090.0
North East Offshore LLC | Payment Guarantee |
Guarantor Obligations [Line Items] |
Maximum Exposure | $ 62.5
Percent of obligations guaranteed (in percent) | 50.00%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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