CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash	$ 106,599	$ 15,432
Receivables, Net (net of allowance for uncollectible accounts of $358,851 and $224,821 as of December 31, 2020 and 2019, respectively)	1,195,925	989,383
Unbilled Revenues	233,025	181,006
Fuel, Materials, Supplies and REC Inventory	265,599	235,471
Regulatory Assets	1,076,556	651,112
Prepayments and Other Current Assets	252,439	342,135
Total Current Assets	3,130,143	2,414,539
Property, Plant and Equipment, Net	30,882,523	27,585,470
Deferred Debits and Other Assets:
Regulatory Assets	5,493,330	4,863,639
Goodwill	4,445,988	4,427,266
Investments in Unconsolidated Affiliates	1,107,143	871,633
Marketable Securities	456,617	449,130
Other Long-Term Assets	583,854	512,238
Total Deferred Debits and Other Assets	12,086,932	11,123,906
Total Assets	46,099,598	41,123,915
Current Liabilities:
Notes Payable	1,249,325	889,084
Long-Term Debt – Current Portion	1,053,186	327,411
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	1,370,647	1,147,872
Regulatory Liabilities	389,430	361,152
Other Current Liabilities	809,214	836,834
Total Current Liabilities	4,915,012	3,605,563
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	4,095,339	3,755,777
Regulatory Liabilities	3,850,781	3,658,042
Derivative Liabilities	294,535	338,710
Asset Retirement Obligations	499,713	488,511
Accrued Pension, SERP and PBOP	1,653,788	1,370,245
Other Long-Term Liabilities	948,506	810,553
Total Deferred Credits and Other Liabilities	11,342,662	10,421,838
Capitalization:
Long-Term Debt	15,125,876	13,770,828
Rate Reduction Bonds	496,912	540,122
Noncontrolling Interest - Preferred Stock of Subsidiaries	155,570	155,570
Common Shareholders' Equity:
Common Shares	1,789,092	1,729,292
Capital Surplus, Paid In	8,015,663	7,087,768
Retained Earnings	4,613,201	4,177,048
Accumulated Other Comprehensive Income	(76,411)	(65,059)
Treasury Stock	(277,979)	(299,055)
Common Shareholders' Equity	14,063,566	12,629,994
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	46,099,598	41,123,915
The Connecticut Light and Power Company
Current Assets:
Cash	90,801	0
Receivables, Net (net of allowance for uncollectible accounts of $358,851 and $224,821 as of December 31, 2020 and 2019, respectively)	459,214	400,927
Unbilled Revenues	57,407	56,465
Fuel, Materials, Supplies and REC Inventory	57,924	50,700
Regulatory Assets	345,622	178,607
Accounts Receivable from Affiliated Companies	17,486	24,577
Prepayments and Other Current Assets	83,950	73,184
Total Current Assets	1,112,404	784,460
Property, Plant and Equipment, Net	10,234,556	9,625,765
Deferred Debits and Other Assets:
Regulatory Assets	1,866,152	1,557,261
Other Long-Term Assets	242,862	217,705
Total Deferred Debits and Other Assets	2,109,014	1,774,966
Total Assets	13,455,974	12,185,191
Current Liabilities:
Notes Payable to Eversource Parent	0	63,800
Long-Term Debt – Current Portion	0	0
Accounts Payable	451,240	374,698
Accounts Payable to Affiliated Companies	51,118	97,793
Obligations to Third Party Suppliers	49,967	56,952
Regulatory Liabilities	137,166	82,763
Derivative Liabilities	68,767	67,804
Other Current Liabilities	102,060	132,339
Total Current Liabilities	860,318	876,149
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,408,343	1,244,551
Regulatory Liabilities	1,204,942	1,164,991
Derivative Liabilities	294,535	338,594
Accrued Pension, SERP and PBOP	478,325	391,159
Other Long-Term Liabilities	133,690	147,586
Total Deferred Credits and Other Liabilities	3,519,835	3,286,881
Capitalization:
Long-Term Debt	3,914,835	3,518,136
Noncontrolling Interest - Preferred Stock of Subsidiaries	116,200	116,200
Common Shareholders' Equity:
Common Shares	60,352	60,352
Capital Surplus, Paid In	2,810,765	2,535,765
Retained Earnings	2,173,367	1,791,392
Accumulated Other Comprehensive Income	302	316
Common Shareholders' Equity	5,044,786	4,387,825
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	13,455,974	12,185,191
NSTAR Electric Company
Current Assets:
Cash	102	52
Receivables, Net (net of allowance for uncollectible accounts of $358,851 and $224,821 as of December 31, 2020 and 2019, respectively)	403,045	346,785
Unbilled Revenues	38,342	37,482
Fuel, Materials, Supplies and REC Inventory	133,894	124,060
Regulatory Assets	399,882	285,591
Accounts Receivable from Affiliated Companies	30,095	29,914
Taxes Receivable	65,051	20,408
Prepayments and Other Current Assets	21,833	10,742
Total Current Assets	1,092,244	855,034
Property, Plant and Equipment, Net	10,123,062	9,472,770
Deferred Debits and Other Assets:
Regulatory Assets	1,304,019	1,250,029
Prepaid PBOP	204,138	166,058
Other Long-Term Assets	162,836	144,368
Total Deferred Debits and Other Assets	1,670,993	1,560,455
Total Assets	12,886,299	11,888,259
Current Liabilities:
Notes Payable	195,000	10,500
Notes Payable to Eversource Parent	21,300	30,300
Long-Term Debt – Current Portion	250,000	95,000
Accounts Payable	383,558	363,691
Accounts Payable to Affiliated Companies	95,703	96,307
Obligations to Third Party Suppliers	98,572	108,827
Renewable Portfolio Standards Compliance Obligations	127,536	150,429
Regulatory Liabilities	164,761	209,180
Other Current Liabilities	72,118	71,333
Total Current Liabilities	1,408,548	1,135,567
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,459,906	1,357,265
Regulatory Liabilities	1,550,390	1,516,585
Accrued Pension, SERP and PBOP	172,571	108,243
Other Long-Term Liabilities	337,245	320,629
Total Deferred Credits and Other Liabilities	3,520,112	3,302,722
Capitalization:
Long-Term Debt	3,393,221	3,247,086
Noncontrolling Interest - Preferred Stock of Subsidiaries	43,000	43,000
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	1,993,942	1,813,442
Retained Earnings	2,527,167	2,346,287
Accumulated Other Comprehensive Income	309	155
Common Shareholders' Equity	4,521,418	4,159,884
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	12,886,299	11,888,259
Public Service Company of New Hampshire
Current Assets:
Cash	141	413
Receivables, Net (net of allowance for uncollectible accounts of $358,851 and $224,821 as of December 31, 2020 and 2019, respectively)	119,899	99,934
Unbilled Revenues	46,041	48,146
Fuel, Materials, Supplies and REC Inventory	26,829	24,957
Regulatory Assets	115,852	84,053
Accounts Receivable from Affiliated Companies	10,925	6,763
Special Deposits	36,767	32,513
Prepaid Property Taxes	26,257	15,768
Prepayments and Other Current Assets	10,788	3,663
Total Current Assets	393,499	316,210
Property, Plant and Equipment, Net	3,374,270	3,129,506
Deferred Debits and Other Assets:
Regulatory Assets	873,203	861,672
Other Long-Term Assets	23,733	43,270
Total Deferred Debits and Other Assets	896,936	904,942
Total Assets	4,664,705	4,350,658
Current Liabilities:
Notes Payable to Eversource Parent	46,300	27,000
Long-Term Debt – Current Portion	282,000	0
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	132,635	127,081
Accounts Payable to Affiliated Companies	43,397	37,946
Regulatory Liabilities	58,756	65,766
Accrued Interest	19,671	19,138
Other Current Liabilities	38,816	32,736
Total Current Liabilities	664,785	352,877
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	537,627	506,212
Regulatory Liabilities	383,183	413,381
Accrued Pension, SERP and PBOP	184,715	157,638
Other Long-Term Liabilities	37,874	37,075
Total Deferred Credits and Other Liabilities	1,143,399	1,114,306
Capitalization:
Long-Term Debt	817,070	951,620
Rate Reduction Bonds	496,912	540,122
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	928,134	903,134
Retained Earnings	615,018	490,306
Accumulated Other Comprehensive Income	(613)	(1,707)
Common Shareholders' Equity	1,542,539	1,391,733
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$ 4,664,705	$ 4,350,658