v3.25.1
CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Balance Sheets (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
ScheduleOfCondensedFinancialStatements [Line Items]        
Total current assets $ 799 $ 1,024    
Total property, plant and equipment, net 5,618 5,680    
Investments in consolidated subsidiaries 0 0    
Deferred tax asset 60 73    
Investment in unconsolidated subsidiaries 82 86    
Other assets 268 272    
TOTAL ASSETS 6,827 7,135    
Total current liabilities 961 980    
Long-term debt 888 1,132    
Asset retirement obligations 989 995    
Other long-term liabilities 339 377    
Deferred tax liability 134 113    
Amounts due to (from) affiliates 0 0    
Total equity 3,516 3,538 $ 2,093 $ 2,219
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 6,827 7,135    
Eliminations        
ScheduleOfCondensedFinancialStatements [Line Items]        
Total current assets 0 0    
Total property, plant and equipment, net 0 0    
Investments in consolidated subsidiaries (17,851) (19,887)    
Deferred tax asset 0 0    
Investment in unconsolidated subsidiaries 0 0    
Other assets 0 0    
TOTAL ASSETS (17,851) (19,887)    
Total current liabilities 0 0    
Long-term debt 0 0    
Asset retirement obligations 0 0    
Other long-term liabilities 0 0    
Deferred tax liability 0 0    
Amounts due to (from) affiliates 0 0    
Total equity (17,851) (19,887)    
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY (17,851) (19,887)    
Parent | Reportable Legal Entities        
ScheduleOfCondensedFinancialStatements [Line Items]        
Total current assets 259 437    
Total property, plant and equipment, net 23 14    
Investments in consolidated subsidiaries 5,108 4,869    
Deferred tax asset 60 73    
Investment in unconsolidated subsidiaries 0 0    
Other assets 114 113    
TOTAL ASSETS 5,564 5,506    
Total current liabilities 248 224    
Long-term debt 888 1,132    
Asset retirement obligations 0 0    
Other long-term liabilities 97 114    
Deferred tax liability 134 113    
Amounts due to (from) affiliates 681 385    
Total equity 3,516 3,538    
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 5,564 5,506    
Combined Unrestricted Subsidiaries | Reportable Legal Entities        
ScheduleOfCondensedFinancialStatements [Line Items]        
Total current assets 45 46    
Total property, plant and equipment, net 31 31    
Investments in consolidated subsidiaries (37) (32)    
Deferred tax asset 0 0    
Investment in unconsolidated subsidiaries 30 27    
Other assets 56 58    
TOTAL ASSETS 125 130    
Total current liabilities 19 14    
Long-term debt 0 0    
Asset retirement obligations 0 0    
Other long-term liabilities 130 138    
Deferred tax liability 0 0    
Amounts due to (from) affiliates 28 0    
Total equity (52) (22)    
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 125 130    
Combined Restricted Subsidiaries | Reportable Legal Entities        
ScheduleOfCondensedFinancialStatements [Line Items]        
Total current assets 495 541    
Total property, plant and equipment, net 5,564 5,635    
Investments in consolidated subsidiaries 12,780 15,050    
Deferred tax asset 0 0    
Investment in unconsolidated subsidiaries 52 59    
Other assets 98 101    
TOTAL ASSETS 18,989 21,386    
Total current liabilities 694 742    
Long-term debt 0 0    
Asset retirement obligations 989 995    
Other long-term liabilities 112 125    
Deferred tax liability 0 0    
Amounts due to (from) affiliates (709) (385)    
Total equity 17,903 19,909    
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 18,989 $ 21,386