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Non-Mineral Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Right-of-Use Assets    
Gross $ 2,010 $ 2,043
Finance Leases, Properties, plants and equipment, Accumulated DD&A (1,185) (1,022)
Net PPE $ 825 $ 1,021
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Operating leases, right-of-use assets $ 691 $ 536
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Noncurrent Other Assets, Noncurrent
Finance leases $ 1,129 $ 1,320
Total lease liabilities 697 545
Proportionately Consolidated    
Right-of-Use Assets    
Net PPE 134 171
Finance leases, current 175 169
Finance leases, noncurrent 326 399
Other accruals    
Right-of-Use Assets    
Total lease liabilities 193 155
Other liabilities and deferred credits    
Right-of-Use Assets    
Total lease liabilities 504 390
Short-term debt    
Right-of-Use Assets    
Finance leases 291 284
Long-term debt    
Right-of-Use Assets    
Finance leases $ 838 $ 1,036