XML 124 R103.htm IDEA: XBRL DOCUMENT v3.22.2.2
REVENUES (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Sep. 01, 2021
May 06, 2021
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers $ 3,259,400 $ 2,444,600 $ 9,273,000 $ 7,355,600      
Alternative Revenue Programs (46,600) (13,500) (22,700) 21,300      
Other Revenues 2,800 1,700 9,300 4,300      
Operating Revenues $ 3,215,645 $ 2,432,794 9,259,596 7,381,172      
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty     (72,041) 103,583      
Operating Lease, Income, Comprehensive Income [Extensible Enumeration] Operating Revenues Operating Revenues          
Lease revenue $ 1,000 $ 1,100 3,100 3,800      
Unfavorable Regulatory Action              
Disaggregation of Revenue [Line Items]              
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty       103,600      
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards             $ 28,400
Unfavorable Regulatory Action | Sales              
Disaggregation of Revenue [Line Items]              
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty       65,000      
CL&P              
Disaggregation of Revenue [Line Items]              
Operating Revenues $ 1,369,101 $ 919,643 3,690,614 2,736,513      
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty     (72,041) 103,583      
Operating Lease, Income, Comprehensive Income [Extensible Enumeration] Operating Revenues Operating Revenues          
Lease revenue $ 200 $ 200 600 600      
CL&P | Unfavorable Regulatory Action              
Disaggregation of Revenue [Line Items]              
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards           $ 28,400  
CL&P | Unfavorable Regulatory Action | Sales              
Disaggregation of Revenue [Line Items]              
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty     65,000        
NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Operating Revenues $ 1,105,452 $ 918,698 2,752,278 2,343,116      
Operating Lease, Income, Comprehensive Income [Extensible Enumeration] Operating Revenues Operating Revenues          
Lease revenue $ 600 $ 700 1,900 2,500      
PSNH              
Disaggregation of Revenue [Line Items]              
Operating Revenues $ 430,642 $ 314,893 1,077,124 887,177      
Operating Lease, Income, Comprehensive Income [Extensible Enumeration] Operating Revenues Operating Revenues          
Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers $ 2,752,600 $ 2,212,300 7,799,600 6,593,800      
Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,633,300 1,267,600 4,663,000 3,920,500      
Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 984,000 823,600 2,718,600 2,302,200      
Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 135,300 121,100 418,000 371,100      
Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 133,900 141,700 333,100 325,500      
Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 340,900 147,100 987,300 437,200      
Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 25,100 37,800 81,300 94,700      
(Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 6,900 (94,300) 71,700 (95,600)      
Operating Segments | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,589,900 1,143,600 4,111,400 3,204,400      
Alternative Revenue Programs (65,100) (82,000) 28,300 (74,200)      
Other Revenues 200 200 500 300      
Operating Segments | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,268,500 1,055,700 3,181,700 2,713,900      
Alternative Revenue Programs (20,500) (14,400) (14,400) (11,300)      
Other Revenues 1,800 700 5,400 2,500      
Operating Segments | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 497,000 394,200 1,227,400 1,047,500      
Alternative Revenue Programs (7,200) (24,100) 8,800 (18,800)      
Other Revenues 600 600 2,100 1,100      
Operating Segments | Total Retail Tariff Sales Revenues | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,092,200 856,400 2,784,500 2,338,100      
Operating Segments | Total Retail Tariff Sales Revenues | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,016,500 849,100 2,471,800 2,134,200      
Operating Segments | Total Retail Tariff Sales Revenues | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 381,000 286,700 929,700 787,900      
Operating Segments | Residential | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 739,100 572,000 1,864,400 1,558,600      
Operating Segments | Residential | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 507,600 401,900 1,239,000 1,069,000      
Operating Segments | Residential | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 246,200 172,900 580,500 467,300      
Operating Segments | Commercial | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 311,200 249,400 808,700 679,300      
Operating Segments | Commercial | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 469,600 411,300 1,128,800 975,700      
Operating Segments | Commercial | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 110,400 88,500 280,500 249,200      
Operating Segments | Industrial | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 41,900 35,000 111,400 100,200      
Operating Segments | Industrial | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 39,300 35,900 104,000 89,500      
Operating Segments | Industrial | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 24,400 25,300 68,700 71,400      
Operating Segments | Wholesale Transmission Revenues | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 250,300 268,200 575,200 652,800      
Operating Segments | Wholesale Transmission Revenues | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 183,800 171,000 512,700 478,200      
Operating Segments | Wholesale Transmission Revenues | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 86,200 88,000 213,100 207,400      
Operating Segments | Wholesale Market Sales Revenues | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 232,900 100,300 656,300 278,100      
Operating Segments | Wholesale Market Sales Revenues | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 57,500 21,300 163,100 64,700      
Operating Segments | Wholesale Market Sales Revenues | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 26,700 12,200 75,800 37,300      
Operating Segments | Other Revenues from Contracts with Customers | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 7,500 12,100 22,800 28,800      
Operating Segments | Other Revenues from Contracts with Customers | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 10,700 14,300 34,100 36,800      
Operating Segments | Other Revenues from Contracts with Customers | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 3,100 7,300 8,800 14,900      
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | CL&P              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 7,000 (93,400) 72,600 (93,400)      
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | PSNH              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Operating Segments | Reserves For Revenues Subject To Refund | CL&P | Unfavorable Regulatory Action              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers         $ 93,400    
Other              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 343,500 326,100 1,062,700 999,100      
Alternative Revenue Programs 0 0 0 0      
Other Revenues 0 0 0 0      
Operating Revenues 343,500 326,100 1,062,700 999,100      
Other | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Other | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Other | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Other | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Other | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 29,900 23,000 79,400 62,500      
Other | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Other | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 313,600 303,100 983,300 936,600      
Other | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Eliminations              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (735,100) (716,100) (2,041,200) (2,021,900)      
Alternative Revenue Programs 52,600 102,000 (46,900) 103,000      
Other Revenues 0 0 0 0      
Operating Revenues (682,500) (614,100) (2,088,100) (1,918,900)      
Eliminations | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (6,900) (6,200) (19,000) (16,900)      
Eliminations | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Eliminations | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (1,700) (1,400) (4,200) (4,100)      
Eliminations | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (5,200) (4,800) (14,800) (12,800)      
Eliminations | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (416,300) (408,500) (1,047,300) (1,075,400)      
Eliminations | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Eliminations | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers (311,900) (301,400) (974,900) (929,600)      
Eliminations | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Eliminations | CL&P              
Disaggregation of Revenue [Line Items]              
Operating Revenues (155,900) (142,200) (449,600) (394,000)      
Eliminations | NSTAR Electric              
Disaggregation of Revenue [Line Items]              
Operating Revenues (144,300) (123,300) (420,400) (362,000)      
Eliminations | PSNH              
Disaggregation of Revenue [Line Items]              
Operating Revenues (59,800) (55,800) (161,200) (142,600)      
Electric Distribution | Operating Segments              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 2,830,400 2,061,800 7,204,500 5,614,000      
Alternative Revenue Programs (37,700) (7,900) (26,200) 14,900      
Other Revenues 2,400 1,300 7,500 3,200      
Operating Revenues 2,795,100 2,055,200 7,185,800 5,632,100      
Electric Distribution | Operating Segments | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 2,489,000 1,991,800 6,184,000 5,258,900      
Electric Distribution | Operating Segments | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,492,900 1,146,800 3,683,900 3,094,900      
Electric Distribution | Operating Segments | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 890,500 748,800 2,216,000 1,902,900      
Electric Distribution | Operating Segments | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 105,600 96,200 284,100 261,100      
Electric Distribution | Operating Segments | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Distribution | Operating Segments | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 317,100 133,800 895,200 380,100      
Electric Distribution | Operating Segments | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 17,300 29,600 53,400 68,400      
Electric Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 7,000 (93,400) 71,900 (93,400)      
Natural Gas Distribution | Operating Segments              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 228,300 182,700 1,564,200 1,256,400      
Alternative Revenue Programs (2,800) 2,700 4,300 21,300      
Other Revenues 100 100 900 100      
Operating Revenues 225,600 185,500 1,569,400 1,277,800      
Natural Gas Distribution | Operating Segments | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 205,000 169,300 1,472,100 1,198,700      
Natural Gas Distribution | Operating Segments | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 94,700 81,700 870,000 722,800      
Natural Gas Distribution | Operating Segments | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 76,700 59,000 456,900 356,400      
Natural Gas Distribution | Operating Segments | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 33,600 28,600 145,200 119,500      
Natural Gas Distribution | Operating Segments | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Natural Gas Distribution | Operating Segments | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 22,700 12,200 89,300 54,100      
Natural Gas Distribution | Operating Segments | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 600 1,200 2,800 3,600      
Natural Gas Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 523,700 530,700 1,312,200 1,348,600      
Alternative Revenue Programs (55,100) (112,600) 48,900 (119,200)      
Other Revenues 200 200 500 700      
Operating Revenues 468,800 418,300 1,361,600 1,230,100      
Electric Transmission | Operating Segments | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 520,300 527,200 1,301,000 1,338,400      
Electric Transmission | Operating Segments | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Electric Transmission | Operating Segments | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 3,400 3,500 10,500 10,200      
Electric Transmission | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 700 0      
Water Distribution | Operating Segments              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 68,600 59,400 170,600 159,400      
Alternative Revenue Programs (3,600) 2,300 (2,800) 1,300      
Other Revenues 100 100 400 300      
Operating Revenues 65,100 61,800 168,200 161,000      
Water Distribution | Operating Segments | Total Retail Tariff Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 65,500 57,400 162,500 153,100      
Water Distribution | Operating Segments | Residential              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 45,700 39,100 109,100 102,800      
Water Distribution | Operating Segments | Commercial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 18,500 17,200 49,900 47,000      
Water Distribution | Operating Segments | Industrial              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,300 1,100 3,500 3,300      
Water Distribution | Operating Segments | Wholesale Transmission Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 0 0 0 0      
Water Distribution | Operating Segments | Wholesale Market Sales Revenues              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 1,100 1,100 2,800 3,000      
Water Distribution | Operating Segments | Other Revenues from Contracts with Customers              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers 2,100 1,800 6,200 5,500      
Water Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund              
Disaggregation of Revenue [Line Items]              
Revenues from Contracts with Customers $ (100) $ (900) $ (900) $ (2,200)