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Non-Mineral Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Right-of-Use Assets    
Gross $ 2,043 $ 1,812
Finance Leases, Properties, plants and equipment, Accumulated DD&A (1,022) $ (857)
Net PPE $ 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 $ 536  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Noncurrent  
Finance leases $ 1,320 $ 1,261
Total lease liabilities 545 667
Proportionately Consolidated    
Right-of-Use Assets    
Net PPE 171 208
Finance leases, current 169 154
Finance leases, noncurrent 399 462
Net PPE    
Right-of-Use Assets    
Net PPE   955
Prepaid expenses and other current assets    
Right-of-Use Assets    
Net PPE   2
Operating leases, right-of-use assets   16
Other assets    
Right-of-Use Assets    
Operating leases, right-of-use assets   649
Other accruals    
Right-of-Use Assets    
Total lease liabilities 155 188
Other liabilities and deferred credits    
Right-of-Use Assets    
Total lease liabilities 390 479
Short-term debt    
Right-of-Use Assets    
Finance leases 284 280
Long-term debt    
Right-of-Use Assets    
Finance leases $ 1,036 $ 981