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Summary of Significant Accounting Policies (Schedule of Revenue from Contracts with Customers) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers $ 4,550 $ 3,741
Oil, Gas and NGL Sales [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 3,126 2,629
Oil, Gas and NGL Sales [Member] | Oil [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 2,414 2,189
Oil, Gas and NGL Sales [Member] | Gas [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 309 128
Oil, Gas and NGL Sales [Member] | NGL [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 403 312
Marketing and Midstream Revenues [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 1,424 1,112
Marketing and Midstream Revenues [Member] | Oil [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 918 807
Marketing and Midstream Revenues [Member] | Gas [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers 272 121
Marketing and Midstream Revenues [Member] | NGL [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues from contracts with customers $ 234 $ 184