0000001 - Document - COVER PAGE link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952160 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952161 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952162 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY link:presentationLink link:calculationLink link:definitionLink 9952163 - Statement - THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952164 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952165 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952166 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952167 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952168 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY link:presentationLink link:calculationLink link:definitionLink 9952169 - Statement - NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952170 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952171 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952172 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952173 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952174 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY link:presentationLink link:calculationLink link:definitionLink 9952175 - Statement - PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - REGULATORY ACCOUNTING link:presentationLink link:calculationLink link:definitionLink 9952178 - Disclosure - PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION link:presentationLink link:calculationLink link:definitionLink 9952179 - Disclosure - DERIVATIVE INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 9952180 - Disclosure - MARKETABLE SECURITIES link:presentationLink link:calculationLink link:definitionLink 9952181 - Disclosure - SHORT-TERM AND LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 9952182 - Disclosure - RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES link:presentationLink link:calculationLink link:definitionLink 9952183 - Disclosure - PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION link:presentationLink link:calculationLink link:definitionLink 9952184 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952185 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 9952186 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) link:presentationLink link:calculationLink link:definitionLink 9952187 - Disclosure - COMMON SHARES link:presentationLink link:calculationLink link:definitionLink 9952188 - Disclosure - COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS link:presentationLink link:calculationLink link:definitionLink 9952189 - Disclosure - EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952190 - Disclosure - REVENUES link:presentationLink link:calculationLink link:definitionLink 9952191 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - REGULATORY ACCOUNTING (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - DERIVATIVE INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - MARKETABLE SECURITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - SHORT-TERM AND LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - COMMON SHARES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - REVENUES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - SEGMENT INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Provision for Uncollectible Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Components of Other Income, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-cash Investing Activities (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash Balances to Cash and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - REGULATORY ACCOUNTING - Components of Regulatory Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - REGULATORY ACCOUNTING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - REGULATORY ACCOUNTING - Components of Regulatory Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Summary of Property, Plant, and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - DERIVATIVE INSTRUMENTS - Gross Fair Values and Net Amounts of Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - DERIVATIVE INSTRUMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - DERIVATIVE INSTRUMENTS - Variations Using Significant unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - MARKETABLE SECURITIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - MARKETABLE SECURITIES - Available-for-Sale Debt Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - MARKETABLE SECURITIES - Contractual Maturities of Available-for-Sale Debt Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - MARKETABLE SECURITIES - Marketable Securities Recorded at Fair Value on a Recurring Basis by Level (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Borrowings Outstanding and Available under the Commercial Paper Programs (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Summary of Long-Term Debt Issuance and Repayments (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Impact of Funding on the Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Impact of Funding on the Income Statements (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION - Components of Net Periodic Benefit Expense/(Income) (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - COMMITMENTS AND CONTINGENCIES - Environmental Sites and Related Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - COMMITMENTS AND CONTINGENCIES - Environmental Matters Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - COMMITMENTS AND CONTINGENCIES - Guarantees and Indemnifications Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - COMMITMENTS AND CONTINGENCIES - Guarantees and Indemnifications (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - COMMITMENTS AND CONTINGENCIES - FERC ROE Complaints Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - COMMITMENTS AND CONTINGENCIES - Spent Nuclear Fuel Obligations Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - COMMITMENTS AND CONTINGENCIES - Offshore Wind Sale and Contingent Liability Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - COMMON SHARES - Common Shares Authorized and Issued (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - COMMON SHARES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - EARNINGS PER SHARE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - EARNINGS PER SHARE - Components of Basic and Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - REVENUES (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - SEGMENT INFORMATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - SEGMENT INFORMATION - Segment Information and Segmented Total Assets (Details) link:presentationLink link:calculationLink link:definitionLink