REGULATORY ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2026

SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items]

SCHEDULE OF REGULATED ASSETS AND LIABILITIES

The tables below present a summary of regulatory assets and liabilities, net of amortization, for the periods indicated:


						March 31, 2026
						Current						Noncurrent						Total
						(Thousands of dollars)
Under-recovered purchased-gas costs						$	2,261					$	—					$	2,261
Pension and postemployment benefit costs, net						10,187						217,257						227,444
Reacquired debt costs						723						1,085						1,808
MGP remediation costs						1,000						29,592						30,592

WNA						25,165						—						25,165
Customer credit deferrals						14,779						1,081						15,860
Other, net						7,372						3,033						10,405
Total regulatory assets						61,487						252,048						313,535
Income tax rate changes						—						(432,690)						(432,690)
Over-recovered purchased-gas costs						(18,378)						—						(18,378)
Ad-valorem tax						(1,553)						—						(1,553)
Other						(1,707)						(8,351)						(10,058)
Total regulatory liabilities						(21,638)						(441,041)						(462,679)
Net regulatory assets and liabilities						$	39,849					$	(188,993)					$	(149,144)


						December 31, 2025
						Current						Noncurrent						Total
						(Thousands of dollars)

Under-recovered purchased-gas costs						$	10,692					$	—					$	10,692
Pension and postemployment benefit costs, net						10,929						221,809						232,738
Reacquired debt costs						723						1,266						1,989
MGP remediation costs						1,000						29,105						30,105

WNA						19,175						—						19,175
Customer credit deferrals						2,953						1,091						4,044
Other, net						4,032						2,954						6,986
Total regulatory assets						49,504						256,225						305,729

Income tax rate changes						—						(444,986)						(444,986)
Over-recovered purchased-gas costs						(56,876)						—						(56,876)
Ad-valorem tax						(165)						—						(165)
Other						(236)						(6,634)						(6,870)
Total regulatory liabilities						(57,277)						(451,620)						(508,897)
Net regulatory assets and liabilities						$	(7,773)					$	(195,395)					$	(203,168)