v3.26.1
FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS (Tables)
 3 Months Ended
Mar. 31, 2026
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis
The following tables present, by level within the fair value hierarchy, TEP’s assets and liabilities accounted for at fair value through net income on a recurring basis classified in their entirety based on the lowest level of input that is significant to the fair value measurement:
Level 1Level 2Total
(in millions)March 31, 2026
Assets
Restricted Cash (1)
$28 $— $28 
Energy Derivative Contracts, Regulatory Recovery (2)
— 23 23 
Energy Derivative Contracts, No Regulatory Recovery (2)
— 16 16 
Total Assets28 39 67 
Liabilities
Energy Derivative Contracts, Regulatory Recovery (2)
— (59)(59)
Energy Derivative Contracts, No Regulatory Recovery (2)
— (1)(1)
Total Liabilities— (60)(60)
Total Assets (Liabilities), Net$28 $(21)$7 
(in millions)December 31, 2025
Assets
Restricted Cash (1)
$30 $— $30 
Energy Derivative Contracts, Regulatory Recovery (2)
— 28 28 
Energy Derivative Contracts, No Regulatory Recovery (2)
— 2 2 
Total Assets30 30 60 
Liabilities
Energy Derivative Contracts, Regulatory Recovery (2)
— (33)(33)
Total Liabilities— (33)(33)
Total Assets (Liabilities), Net$30 $(3)$27 
(1)Restricted Cash represents amounts held in money market funds, which approximates fair market value. Restricted Cash is included in Investments and Other Property and in Current Assets—Other on the Condensed Consolidated Balance Sheets.
(2)Energy Derivative Contracts include gas swap agreements and forward power purchase and sale contracts entered into to reduce exposure to energy price risk. These contracts are included in Derivative Instruments on the Condensed Consolidated Balance Sheets.
Schedule of Potential Offset of Assets by Counterparty Netting and Cash Collateral The tables below present the potential offset of counterparty netting and cash collateral:
Gross Amount Recognized in the Balance SheetsGross Amount Not Offset in the Balance SheetsNet Amount
Counterparty Netting of Energy Contracts
Cash Collateral Received/Posted (1)
(in millions)March 31, 2026
Derivative Assets
Energy Derivative Contracts$39 $18 $— $21 
Derivative Liabilities
Energy Derivative Contracts(60)(18)— (42)
(in millions)December 31, 2025
Derivative Assets
Energy Derivative Contracts$30 $17 $— $13 
Derivative Liabilities
Energy Derivative Contracts(33)(17)— (16)
(1)TEP records cash collateral posted related to energy derivative contracts in Current Assets—Other on the Condensed Consolidated Balance Sheets. As of May 5, 2026, TEP had $7 million of cash posted as collateral to provide credit enhancement.
Schedule of Potential Offset of Liabilities by Counterparty Netting and Cash Collateral The tables below present the potential offset of counterparty netting and cash collateral:
Gross Amount Recognized in the Balance SheetsGross Amount Not Offset in the Balance SheetsNet Amount
Counterparty Netting of Energy Contracts
Cash Collateral Received/Posted (1)
(in millions)March 31, 2026
Derivative Assets
Energy Derivative Contracts$39 $18 $— $21 
Derivative Liabilities
Energy Derivative Contracts(60)(18)— (42)
(in millions)December 31, 2025
Derivative Assets
Energy Derivative Contracts$30 $17 $— $13 
Derivative Liabilities
Energy Derivative Contracts(33)(17)— (16)
(1)TEP records cash collateral posted related to energy derivative contracts in Current Assets—Other on the Condensed Consolidated Balance Sheets. As of May 5, 2026, TEP had $7 million of cash posted as collateral to provide credit enhancement.
Schedule of Financial Impact of Energy Contracts The table below presents the unrealized gains and losses recorded to a regulatory asset or liability in the balance sheet:
Three Months Ended March 31,
(in millions)
2026 (1)
2025
Unrealized Net Gain (Loss)$(31)$(3)
(1)Unrealized net loss on regulatory recoverable derivative contracts primarily resulted from declining forward natural gas prices.
The table below presents amounts recorded in Operating Revenues on the Condensed Consolidated Statements of Income:
Three Months Ended March 31,
(in millions)20262025
Operating Revenues$14 $21 
Schedule of Derivative Volumes The following table presents volumes associated with the energy contracts:
March 31, 2026December 31, 2025
Power Contracts GWh5,865 1,430
Gas Contracts BBtu71,477 72,959
Schedule of Face Value and Estimated Fair Value of Long-Term Debt The following table includes the net carrying value and estimated fair value of TEP's long-term debt:
Fair Value HierarchyNet Carrying ValueFair Value
(in millions)March 31, 2026December 31, 2025March 31, 2026December 31, 2025
Liabilities
Long-Term Debt, including Current MaturitiesLevel 2$2,793 $2,793 $2,478 $2,532