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Impairments and Other Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Restructuring and Related Activities [Abstract] |  |  |  |  |  |
Severance costs |  | $ 15 | $ 83 | $ 15 | $ 356 |
Long-lived asset impairments |  | 0 | 31 | 0 | 2,299 |
Inventory write-downs |  | 0 | 11 | 0 | 505 |
Other |  | 35 | 8 | 35 | 193 |
Restructuring and Related Cost, Accelerated Depreciation |  | 36 | 0 | 36 | 0 |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairments and other charges | [1] | 12 | 133 | 12 | 3,353 |
Operating lease right-of-use assets |  | 984 |  | 984 |  | $ 786
Current portion of operating lease liabilities |  | $ 258 |  | 258 |  | $ 251
Sale and Leaseback Transaction, Gain (Loss), Net |  |  | 0 | (74) | 0 |
Proceeds from Sale of Real Estate Held-for-investment |  |  |  | 87 | 0 |
Minimum lease term |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  | twelve |  |  |  |
Maximum lease term |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  | fifteen |  |  |  |
Number of options to extend |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Lessee, Operating Lease, Option to Extend |  | two |  |  |  |
Structured Real Estate Transaction |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures |  | $ 349 |  | 349 |  |
Disposal Group, Including Discontinued Operation, Assets, Current |  | 358 |  | $ 358 |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |  | 276 |  |  |  |
Increase (Decrease) in Operating Lease Liability |  | $ 276 |  |  |  |
Lessee, Operating Lease, Renewal Term |  | 5 years |  | 5 years |  |
Sale and Leaseback Transaction, Gain (Loss), Net |  | $ (74) |  |  |  |
Lessee, Operating Lease, Existence of Option to Extend [true false] |  | true |  |  |  |
LesseeOperatingLeaseVariableLeasePaymentTermsPercentage |  | 1.35% |  |  |  |
Proceeds from Sale of Real Estate Held-for-investment |  | $ 87 |  |  |  |
Completion And Production [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairments and other charges |  | 42 | 90 | $ 42 | 2,100 |
Drilling And Evaluation [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairments and other charges |  | 9 | 40 | 9 | 1,200 |
Corporate and Other [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairments and other charges |  | $ (39) | $ 3 | $ (39) | $ 44 |
[1] | For the three and nine months ended September 30, 2021, amount includes a $42 million charge attributable to Completions and Production, a $9 million charge attributable to Drilling and Evaluation, and a $39 million net gain attributable to Corporate and other. For the three and nine months ended September 30, 2020, amount includes $90 million and $2.1 billion attributable to Completion and Production, $40 million and $1.2 billion attributable to Drilling and Evaluation, and $3 million and $44 million attributable to Corporate and other, respectively.

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