v3.25.2
Commitment and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]  
Lease, Cost
Components of lease expense:
Three Months Ended June 30
(Millions of Dollars)20252024
Operating leases
PPA capacity payments$25 $25 
Other operating leases (a)
33
Total operating lease expense (b)
$28 $28 
(a)Includes immaterial short-term lease expense.
(b)PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power.

Six Months Ended June 30
(Millions of Dollars)20252024
Operating leases
PPA capacity payments$50 $48 
Other operating leases (a)
98
Total operating lease expense (b)
$59 $56 
(a)Includes immaterial short-term lease expense.
(b)PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power.
Lessee, Operating Lease, Liability, Maturity
Commitments under operating leases as of June 30, 2025:
(Millions of Dollars)PPA Operating
Leases
Other Operating
Leases
Total
Operating
Leases
Total minimum obligation$252 $251 $503 
Interest component of obligation(16)(122)(138)
Present value of minimum obligation$236 $129 365 
Less current portion(100)
Noncurrent operating lease liabilities$265