v3.25.1
Leases (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Finance lease, right-of-use asset $ 143   $ 143
Operating lease, expense 3 $ 3  
Operating lease payments 3    
Right-of-use asset obtained in exchange for operating lease liability $ 3    
Operating lease, weighted-average remaining lease term 17 years    
Operating lease, weighted-average discount rate 5.00%    
Payments, remainder of fiscal year $ 9    
Payments, year one 11    
Payments, year two 10    
Payments, year three 8    
Payments, year four 7    
Thereafter 85    
Imputed interest $ 47    
Real Property      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease, term of contract 40 years    
Vehicles      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease, term of contract 5 years    
Equipment      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease, term of contract 5 years    
Operating and Maintenance Agreement      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Future minimum sublease rentals, remainder of fiscal year $ 3    
Future minimum sublease rentals, year one 4    
Future minimum sublease rentals, year two 4    
Future minimum sublease rentals, year three 4    
Future minimum sublease rentals, year four 4    
Future minimum sublease rentals, thereafter $ 37    
Minimum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease, renewal term 1 year    
Maximum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease, renewal term 60 years    
Utility Plant | Minimum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Lessee, finance lease, term of contract 30 years    
Utility Plant | Maximum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Lessee, finance lease, term of contract 40 years