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Acquisitions (Schedule Of Assets Acquired And Liabilities Assumed In Acquisition Table) (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 02, 2021
Feb. 28, 2021
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]          
Goodwill       $ 33 $ 142
Enable          
Business Acquisition [Line Items]          
Total current assets $ 593        
Property, plant and equipment, net 7,076        
Intangible assets, net 440        
Goodwill 138   $ 138    
Total consideration 3,519        
Total assets acquired 8,326        
Total current liabilities 488        
Long-term debt, less current maturities(1) [1] 4,267        
Other non-current liabilities 18        
Total liabilities assumed 4,773        
Cash received 61        
Noncontrolling interests 34        
Other non-current assets 39        
Total consideration, net of cash received 3,458 $ 10      
Enable | Enable Five-Year Revolving Credit Facility          
Business Acquisition [Line Items]          
Line of Credit Facility, Current Borrowing Capacity 35        
Enable | Investments in Unconsolidated Affiliates          
Business Acquisition [Line Items]          
Investments in unconsolidated affiliates $ 40        
Woodford Express Acquisition          
Business Acquisition [Line Items]          
Total consideration, net of cash received       $ 485  
[1] Long-term debt at December 2, 2021 includes Enable senior notes with an aggregate principal amount of $3.18 billion in senior notes and a fair value of $3.43 billion. It also includes $800 million outstanding on the Enable 2019 Term Loan Agreement and $35 million outstanding on the Enable Five-Year Revolving Credit Facility, both of which were repaid and terminated in December 2021, immediately subsequent to the close of the Enable Acquisition.