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v3.19.3.a.u2

Postemployment Benefit Plans (Costs) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net periodic benefit costs, before tax |  |  |
Service cost | $ 7 | $ 7 | $ 6
Interest cost | 74 | 72 | 76
Expected return on plan assets | (88) | (91) | (94)
Special termination benefits |  | 1 |
Settlements and curtailments | 3 | (5) | 13
Actuarial loss, net | 3 | 9 | 7
Prior service gain, net | (2) | (2) | (3)
Net periodic benefit costs (income) | (3) | (9) | 5
OPEB Plans |  |  |
Net periodic benefit costs, before tax |  |  |
Interest cost | 1 | 1 |
Special termination benefits |  | 1 |
Settlements and curtailments |  | (4) |
Actuarial loss, net |  |  | 1
Prior service gain, net | (2) | (2) | (3)
Net periodic benefit costs (income) | (1) | (4) | (2)
U.S. | Transocean Plans |  |  |
Net periodic benefit costs, before tax |  |  |
Service cost |  |  | 3
Interest cost | 63 | 61 | 65
Expected return on plan assets | (71) | (72) | (74)
Settlements and curtailments | 1 |  |
Actuarial loss, net | 3 | 8 | 5
Net periodic benefit costs (income) | (4) | (3) | (1)
Non-U.S. Plans | Transocean Plans |  |  |
Net periodic benefit costs, before tax |  |  |
Service cost | 7 | 7 | 3
Interest cost | 10 | 10 | 11
Expected return on plan assets | (17) | (19) | (20)
Settlements and curtailments | 2 | (1) | 13
Actuarial loss, net |  | 1 | 1
Net periodic benefit costs (income) | $ 2 | $ (2) | $ 8

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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