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Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current income taxes: |  |  |  |  |  |
Federal |  | $ 32 |  | $ 19 |  | $ 40
Foreign |  | (426) |  | (428) |  | (423)
State |  | (9) |  | (15) |  | (14)
Total current |  | (403) |  | (424) |  | (397)
Deferred income taxes: |  |  |  |  |  |
Federal |  | 383 |  | 286 |  | (678)
Foreign |  | (36) |  | 9 |  | (31)
State |  | 49 |  | (28) |  | (25)
Total deferred |  | 396 |  | 267 |  | (734)
Income tax provision |  | (7) |  | (157) |  | (1,131)
The United States and foreign components of income from continuing operations before income taxes [Abstract] |  |  |  |  |  |
United States |  | (1,517) |  | 1,097 |  | 694
Foreign |  | 395 |  | 717 |  | (12)
Income (loss) from continuing operations before income taxes |  | $ (1,122) |  | $ 1,814 |  | $ 682
Reconciliations between the actual provision for income taxes on continuing operations [Abstract] |  |  |  |  |  |
United States statutory rate |  | 21.00% |  | 21.00% |  | 35.00%
Impact of impairments and other charges |  | (20.90%) |  | 0.00% |  | 0.00%
Adjustments of prior year taxes |  | 13.00% |  | 2.00% |  | (2.30%)
Valuation allowance against tax assets |  | (10.70%) |  | (16.20%) |  | (6.20%)
State income taxes |  | (1.30%) |  | 1.90% |  | 1.70%
Impact of foreign income taxed at different rates |  | 0.80% |  | (3.00%) |  | (18.30%)
Venezuela adjustment |  | 0.00% |  | 5.70% |  | 36.60%
Impact of U.S. tax reform |  | 0.00% |  | (2.60%) |  | 113.00%
Undistributed foreign earnings |  | 0.00% |  | 0.00% |  | 3.80%
Other items, net |  | (2.50%) |  | (0.10%) |  | 2.50%
Total effective tax rate on continuing operations |  | (0.60%) |  | 8.70% |  | 165.80%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount |  | $ 291 |  |  |  |
Gross deferred tax assets: |  |  |  |  |  |
Net operating loss carryforwards |  | 1,301 |  | $ 1,466 |  |
Foreign tax credit carryforwards |  | 877 |  | 728 |  |
Research and development tax credit carryforwards |  | 198 |  | 139 |  |
Employee compensation and benefits |  | 215 |  | 242 |  |
Accrued Liabilities |  | 316 |  | 101 |  |
Other |  | 382 |  | 265 |  |
Total gross deferred tax assets |  | 3,289 |  | 2,941 |  |
Gross deferred tax liabilities: |  |  |  |  |  |
Depreciation and amortization |  | 373 |  | 635 |  |
Operating lease right-of-use assets |  | 109 |  | 0 |  |
Undistributed Foreign Earnings |  | 2 |  | 2 |  |
Other |  | 56 |  | 64 |  |
Total gross deferred tax liabilities |  | 540 |  | 701 |  |
Valuation allowances |  | 1,082 |  | 913 |  |
Net deferred income tax asset |  | 1,667 |  | 1,327 |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |  | 1,500 |  |  |  |
Unrecognized Tax Benefits, Period Increase (Decrease) |  | 200 |  |  |  |
Unrecognized Tax Benefits |  |  |  |  |  |
Beginning Balance |  | 417 | [1] | 333 |  | $ 427
Change in prior year tax positions |  |  |  |  |  | (108)
Change in prior year tax positions |  | 25 |  | 32 |  |
Change in current year tax positions |  | 29 |  | 63 |  | 24
Cash settlements with taxing authorities |  | (4) |  | (7) |  | (6)
Lapse of statute of limitations |  | (42) |  | (4) |  | (4)
Ending balance |  | 425 | [1],[2] | 417 | [1] | 333
Interest and Penalties |  |  |  |  |  |
Beginning balance |  | 67 |  | 60 |  | 61
Change in prior year tax positions |  | 11 |  | 11 |  | 0
Change in current year tax positions |  | 0 |  | 0 |  | 2
Cash settlements with taxing authorities |  | 0 |  | (2) |  | 0
Lapse of statute of limitations |  | (8) |  | (2) |  | (3)
Ending balance |  | 70 |  | 67 |  | 60
Remaining balance if resolved in our favor would positively impact the effective tax rate |  | 271 |  | 399 |  |
Portion of unrecognized tax benefits that could be resolved within the next 12 months |  | 30 |  |  |  |
Impairments and other charges | [3] | (2,506) |  | (265) |  | (647)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | 169 |  |  |  |
Years 2020-2024 |  |  |  |  |  |
Gross deferred tax liabilities: |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |  | 157 |  |  |  |
Years 2025-2029 |  |  |  |  |  |
Gross deferred tax assets: |  |  |  |  |  |
Foreign tax credit carryforwards |  | 967 |  |  |  |
Gross deferred tax liabilities: |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |  | 219 |  |  |  |
Years 2030-2040 |  |  |  |  |  |
Gross deferred tax assets: |  |  |  |  |  |
Research and development tax credit carryforwards |  | 198 |  |  |  |
Gross deferred tax liabilities: |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |  | 755 |  |  |  |
VENEZUELA |  |  |  |  |  |
Interest and Penalties |  |  |  |  |  |
Impairments and other charges | [3] |  |  | (265) |  | $ (647)
All Other Countries [Domain] |  |  |  |  |  |
Interest and Penalties |  |  |  |  |  |
Remaining balance if resolved in our favor would positively impact the effective tax rate |  | 25 |  | $ 18 |  |
Deferred tax assets [Member] | Foreign |  |  |  |  |  |
Interest and Penalties |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | 85 |  |  |  |
Tax credits [Member] | Foreign |  |  |  |  |  |
Interest and Penalties |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | $ 84 |  |  |  |
[1] | Includes $25 million as of December 31, 2019 and $18 million as of December 31, 2018 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2019 and December 31, 2018, a net $271 million and $399 million without a net operating loss carryforward offset, respectively, of unrecognized tax benefits would positively impact the effective tax rate and be recognized as additional tax benefits in our statement of operations if resolved in our favor.
[2] | Includes $30 million that could be resolved within the next 12 months.
[3] | Impairments and other charges are as follows: -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018 and December 31, 2017, we recorded aggregate charges of $265 million and $647 million, respectively, to write-down our investment in Venezuela.

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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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