v3.25.2
Commitments and Contingencies - Leases (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Lessee, Lease, Description [Line Items]          
Operating Lease, Cost $ 24 [1] $ 25 [1] $ 51 [2] $ 51 [2]  
Finance Lease, Right-of-Use Asset, Amortization 1 1 2 2  
Finance Lease, Interest Expense 3 3 7 7  
Finance Lease, Cost 4 4 9 9  
Lessee, Operating Lease, Liability, Payments, Due 500   500    
Total minimum obligation 391   391    
Interest component of obligation (104)   (104)    
Finance Lease, Liability, Undiscounted Excess Amount (282)   (282)    
Operating Lease, Liability 396   396    
Finance Lease, Liability 109   109    
Less current portion (73)   (73)   $ (94)
Less current portion (4)   (4)    
Operating lease liabilities 323   323   $ 190
Noncurrent operating and finance lease liabilities 105   105    
PPAs          
Lessee, Lease, Description [Line Items]          
Operating Lease, Cost 20 20 43 41  
Lessee, Operating Lease, Liability, Payments, Due 321   321    
Interest component of obligation (42)   (42)    
Operating Lease, Liability 279   279    
Other          
Lessee, Lease, Description [Line Items]          
Operating Lease, Cost 4 [3] $ 5 [3] 8 [4] $ 10 [4]  
Lessee, Operating Lease, Liability, Payments, Due 179   179    
Interest component of obligation (62)   (62)    
Operating Lease, Liability $ 117   $ 117    
[1] 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
[2] 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.
[3] Includes immaterial short-term lease expense.
[4] Includes immaterial short-term lease expense.