REGULATORY ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2022

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, 2022
	Current		Noncurrent		Total
	(Thousands of dollars)
Winter weather event costs	$	1,539,868	$	366,424	$	1,906,292
Under-recovered purchased-gas costs	9,751		—		9,751
Pension and postemployment benefit costs	11,508		249,074		260,582
Reacquired debt costs	812		3,889		4,701
MGP remediation costs	98		29,816		29,914
Ad-valorem tax	8,192		—		8,192
WNA	11,440		—		11,440
Customer credit deferrals	17,177		—		17,177
Other	1,188		2,728		3,916
Total regulatory assets, net of amortization	1,600,034		651,931		2,251,965
Income tax rate changes	—		(542,622)		(542,622)
Over-recovered purchased-gas costs	(32,822)		—		(32,822)
Total regulatory liabilities	(32,822)		(542,622)		(575,444)
Net regulatory assets and liabilities	$	1,567,212	$	109,309	$	1,676,521

	December 31, 2021
	Current		Noncurrent		Total
	(Thousands of dollars)
Winter weather event costs	$	1,536,054	$	428,023	$	1,964,077
Under-recovered purchased-gas costs	31,863		—		31,863
Pension and postemployment benefit costs	11,507		260,559		272,066
Reacquired debt costs	812		4,070		4,882
MGP remediation costs	98		29,841		29,939
Ad-valorem tax	8,561		—		8,561
WNA	10,044		—		10,044
Customer credit deferrals	10,685		—		10,685
Other	2,052		2,369		4,421
Total regulatory assets, net of amortization	1,611,676		724,862		2,336,538
Income tax rate changes	—		(552,928)		(552,928)
Over-recovered purchased-gas costs	(8,090)		—		(8,090)
Total regulatory liabilities	(8,090)		(552,928)		(561,018)
Net regulatory assets and liabilities	$	1,603,586	$	171,934	$	1,775,520