XML 37 R24.htm IDEA: XBRL DOCUMENT v3.22.4
Regulatory Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2022
Regulatory Assets and Liabilities Disclosure [Abstract]  
Regulatory Assets
Components of regulatory assets:
(Millions of Dollars)See Note(s)Remaining Amortization PeriodDec. 31, 2022
Dec. 31, 2021 (a)
Regulatory AssetsCurrentNoncurrentCurrentNoncurrent
Pension and retiree medical obligations9Various$2 $146 $11 $135 
Net AROs (b)
1, 10Various— 48 — 40 
Excess deferred taxes — TCJA 7Various1 48 2 50 
Recoverable deferred taxes on AFUDCPlant lives— 40 — 41 
Deferred natural gas and electric energy/fuel costs
One to three years
136 34 146 4 
Losses on reacquired debtTerm of related debt1 19 1 19 
Texas revenue surcharges
One year
69 — 20 64 
OtherVarious8 24 13 27 
Total regulatory assets$217 $359 $193 $380 
(a)Prior period amounts have been restated to conform with current year presentation.
(b)Includes amounts recorded for future recovery of AROs.
Regulatory Liabilities
Components of regulatory liabilities:
(Millions of Dollars)See Note(s)Remaining Amortization PeriodDec. 31, 2022
Dec. 31, 2021 (a)
Regulatory LiabilitiesCurrentNoncurrentCurrentNoncurrent
Deferred income tax adjustments and TCJA refunds (b)
7 Various$— $469 $15 $486 
Plant removal costs1, 10Various— 198 — 190 
Effects of regulation on employee benefit costsVarious— 20 — 19 
Renewable resources and environmental initiativesVarious— 14 — 7 
Formula rates
One to two years
10 8 6 4 
Contract valuation adjustments (c)
1, 8
One to two years
119 1 27 1 
OtherVarious19 5 6 2 
Total regulatory liabilities$148 $715 $54 $709 
(a)Prior period amounts have been restated to conform with current year presentation.
(b)Includes the revaluation of recoverable/regulated plant accumulated deferred income taxes and revaluation impact of non-plant accumulated deferred income taxes due to the TCJA.
(c)Includes the fair value of FTR instruments utilized/intended to offset the impacts of transmission system congestion.