NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current Assets:
Cash	$ 135,351	$ 26,656
Receivables, Net (net of allowance for uncollectible accounts)	1,847,094	1,651,325
Unbilled Revenues	275,108	242,169
Materials, Supplies, Natural Gas and REC Inventory	491,592	594,568
Regulatory Assets	1,975,083	2,189,660
Prepayments and Other Current Assets	352,958	315,368
Total Current Assets	5,077,186	5,076,073
Property, Plant and Equipment, Net	45,930,959	40,986,578
Deferred Debits and Other Assets:
Regulatory Assets	5,718,646	4,880,974
Prepaid Pension and PBOP	1,511,169	1,336,633
Other Long-Term Assets	997,883	811,521
Total Deferred Debits and Other Assets	12,778,566	13,531,878
Total Assets	63,786,711	59,594,529
Current Liabilities:
Long-Term Debt – Current Portion	1,392,948	1,003,150
Accounts Payable	1,859,692	1,736,880
Regulatory Liabilities	1,264,609	632,282
Other Current Liabilities	894,219	853,491
Total Current Liabilities	7,808,512	6,720,957
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,647,218	5,411,206
Regulatory Liabilities	4,273,465	4,032,564
Derivative Liabilities	100,859	95,400
Other Long-Term Liabilities	1,101,932	773,999
Total Deferred Credits and Other Liabilities	12,472,065	11,652,918
Capitalization:
Long-Term Debt	26,872,433	25,701,627
Preferred Stock Not Subject to Mandatory Redemption	155,568	155,568
Common Shareholders' Equity:
Capital Surplus, Paid In	9,937,878	9,428,905
Retained Earnings	4,504,983	3,929,141
Accumulated Other Comprehensive Income/(Loss)	(20,507)	(26,472)
Common Shareholders' Equity	16,197,271	15,039,387
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	63,786,711	59,594,529
NSTAR Electric Company
Current Assets:
Cash	8,302	911
Unbilled Revenues	56,948	59,079
Materials, Supplies, Natural Gas and REC Inventory	210,865	220,621
Regulatory Assets	978,754	902,770
Derivative Assets	91,011	0
Prepayments and Other Current Assets	90,040	72,986
Total Current Assets	2,332,299	1,953,851
Property, Plant and Equipment, Net	15,308,896	14,037,828
Deferred Debits and Other Assets:
Regulatory Assets	1,823,522	1,204,337
Prepaid Pension and PBOP	804,109	724,661
Other Long-Term Assets	264,073	154,571
Total Deferred Debits and Other Assets	2,891,704	2,083,569
Total Assets	20,532,899	18,075,248
Current Liabilities:
Notes Payable	245,445	504,782
Long-Term Debt – Current Portion	300,000	250,000
Obligations to Third Party Suppliers	179,757	163,711
Regulatory Liabilities	650,813	436,312
Other Current Liabilities	208,979	202,197
Total Current Liabilities	2,341,306	2,245,542
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	2,087,287	2,005,439
Regulatory Liabilities	1,702,059	1,643,079
Derivative Liabilities	753,149	0
Other Long-Term Liabilities	401,625	377,462
Total Deferred Credits and Other Liabilities	4,944,120	4,025,980
Capitalization:
Long-Term Debt	5,645,638	4,844,920
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	4,238,842	3,788,842
Retained Earnings	3,319,768	3,127,105
Accumulated Other Comprehensive Income/(Loss)	225	(141)
Common Shareholders' Equity	7,558,835	6,915,806
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	20,532,899	18,075,248
NSTAR Electric Company | Nonrelated Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	616,280	614,563
Current Liabilities:
Accounts Payable	558,227	534,868
NSTAR Electric Company | Related Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	280,099	82,921
Current Liabilities:
Accounts Payable	$ 198,085	$ 153,672