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Pension and Other Postretirement Benefit Plans | 6 Months Ended
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Jun. 30, 2018
Compensation And Retirement Disclosure [Abstract] |
Pension and Other Postretirement Benefit Plans | 12. Pension and Other Postretirement Benefit Plans Net pension cost (credit) for the Schlumberger pension plans included the following components:
(Stated in millions) |  |
| Second Quarter |  |  | Six Months |  |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |
| US |  |  | Int'l |  |  | US |  |  | Int'l |  |  | US |  |  | Int'l |  |  | US |  |  | Int'l |  |
Service cost | $ | 14 |  |  | $ | 38 |  |  | $ | 14 |  |  | $ | 19 |  |  | $ | 30 |  |  | $ | 70 |  |  | $ | 29 |  |  | $ | 48 |  |
Interest cost |  | 41 |  |  |  | 76 |  |  |  | 44 |  |  |  | 75 |  |  |  | 84 |  |  |  | 152 |  |  |  | 88 |  |  |  | 153 |  |
Expected return on plan assets |  | (63 | ) |  |  | (149 | ) |  |  | (62 | ) |  |  | (134 | ) |  |  | (125 | ) |  |  | (293 | ) |  |  | (122 | ) |  |  | (270 | ) |
Amortization of prior service cost |  | 3 |  |  |  | 3 |  |  |  | 3 |  |  |  | 24 |  |  |  | 6 |  |  |  | 5 |  |  |  | 6 |  |  |  | 48 |  |
Amortization of net loss |  | 12 |  |  |  | 27 |  |  |  | 9 |  |  |  | 27 |  |  |  | 24 |  |  |  | 70 |  |  |  | 19 |  |  |  | 60 |  |
| $ | 7 |  |  | $ | (5 | ) |  | $ | 8 |  |  | $ | 11 |  |  | $ | 19 |  |  | $ | 4 |  |  | $ | 20 |  |  | $ | 39 |  |
The net periodic benefit credit for the Schlumberger US postretirement medical plan included the following components:
(Stated in millions) |
| Second Quarter |  |  | Six Months |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost | $ | 8 |  |  | $ | 7 |  |  | $ | 16 |  |  | $ | 15 |
Interest cost |  | 10 |  |  |  | 12 |  |  |  | 22 |  |  |  | 23 |
Expected return on plan assets |  | (16 | ) |  |  | (16 | ) |  |  | (32 | ) |  |  | (31 | )
Amortization of prior service credit |  | (7 | ) |  |  | (7 | ) |  |  | (14 | ) |  |  | (14 | )
| $ | (5 | ) |  | $ | (4 | ) |  | $ | (8 | ) |  | $ | (7 | )

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- References No definition available. + Details
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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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