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REGULATION (Tables)
 3 Months Ended
Dec. 31, 2025
Regulated Operations [Abstract]  
Schedule of Regulatory Assets
Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for NJNG are comprised of the following:
(Thousands)December 31,
2025		September 30,
2025
Regulatory assets-current
New Jersey Clean Energy Program$14,572 $17,171 
Conservation Incentive Program— 22,697 
Derivatives at fair value, net13,171 7,544 
Other current regulatory assets1,442 1,486 
Total current regulatory assets$29,185 $48,898 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$69,910 $74,961 
Liability for future expenditures167,462 166,990 
Deferred income taxes46,781 46,013 
SAVEGREEN145,264 141,562 
Postemployment and other benefit costs41,703 41,275 
Cost of removal131,790 132,895 
Other noncurrent regulatory assets56,633 63,612 
Total noncurrent regulatory assets$659,543 $667,308 
Regulatory liability-current
Overrecovered natural gas costs$17,855 $10,643 
Conservation Incentive Program3,559 — 
Total current regulatory liabilities$21,414 $10,643 
Regulatory liabilities-noncurrent
Tax Act impact$169,054 $170,309 
Other noncurrent regulatory liabilities1,458 868 
Total noncurrent regulatory liabilities$170,512 $171,177 

Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for Adelphia are comprised of the following:
(Thousands)December 31,
2025		September 30,
2025
Total noncurrent regulatory assets$5,201 $5,210 
Total current regulatory liabilities$1,677 $2,241 
Schedule of Regulatory Liabilities
Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for NJNG are comprised of the following:
(Thousands)December 31,
2025		September 30,
2025
Regulatory assets-current
New Jersey Clean Energy Program$14,572 $17,171 
Conservation Incentive Program— 22,697 
Derivatives at fair value, net13,171 7,544 
Other current regulatory assets1,442 1,486 
Total current regulatory assets$29,185 $48,898 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$69,910 $74,961 
Liability for future expenditures167,462 166,990 
Deferred income taxes46,781 46,013 
SAVEGREEN145,264 141,562 
Postemployment and other benefit costs41,703 41,275 
Cost of removal131,790 132,895 
Other noncurrent regulatory assets56,633 63,612 
Total noncurrent regulatory assets$659,543 $667,308 
Regulatory liability-current
Overrecovered natural gas costs$17,855 $10,643 
Conservation Incentive Program3,559 — 
Total current regulatory liabilities$21,414 $10,643 
Regulatory liabilities-noncurrent
Tax Act impact$169,054 $170,309 
Other noncurrent regulatory liabilities1,458 868 
Total noncurrent regulatory liabilities$170,512 $171,177 

Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for Adelphia are comprised of the following:
(Thousands)December 31,
2025		September 30,
2025
Total noncurrent regulatory assets$5,201 $5,210 
Total current regulatory liabilities$1,677 $2,241