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Summary of Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Reconciliation of Earnings Per Share | The following is a reconciliation from basic to diluted earnings (loss) per share of Schlumberger for each of the last three years:
(Stated in millions, except per share amounts) |
|  | Net Income (Loss) Attributable to Schlumberger |  |  | Average Shares Outstanding |  |  | Earnings (Loss) per Share |
2018: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 2,138 |  |  |  | 1,385 |  |  | $ | 1.54 |
Assumed exercise of stock options |  |  | - |  |  |  | - |  |  |  |  |
Unvested restricted stock |  |  | - |  |  |  | 8 |  |  |  |  |
Diluted |  | $ | 2,138 |  |  |  | 1,393 |  |  | $ | 1.53 |
2017: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (1,505 | ) |  |  | 1,388 |  |  | $ | (1.08 | )
Assumed exercise of stock options |  |  | - |  |  |  | - |  |  |  |  |
Unvested restricted stock |  |  | - |  |  |  | - |  |  |  |  |
Diluted |  | $ | (1,505 | ) |  |  | 1,388 |  |  | $ | (1.08 | )
2016: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (1,687 | ) |  |  | 1,357 |  |  | $ | (1.24 | )
Assumed exercise of stock options |  |  | - |  |  |  | - |  |  |  |  |
Unvested restricted stock |  |  | - |  |  |  | - |  |  |  |  |
Diluted |  | $ | (1,687 | ) |  |  | 1,357 |  |  | $ | (1.24 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The number of outstanding employee stock options to purchase shares of Schlumberger common stock and unvested restricted stock units that were not included in the computation of diluted earnings/loss per share, because to do so would have had an anti-dilutive effect, were as follows:
(Stated in millions) |
| 2018 |  |  | 2017 |  |  | 2016 |
Employee stock options |  | 40 |  |  |  | 47 |  |  |  | 47 |
Unvested restricted stock |  | - |  |  |  | 5 |  |  |  | 5 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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