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Postemployment Benefit Plans (Assets) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Fair value of plan assets |  |  |
Total investments | $ 1,604 | $ 1,637 | $ 1,759
Defined benefit plan contributions funded by cash flows from operations |  |  |
Defined benefit plan contributions funded by cash flows from operations | 49 | 39 | 101
Projected pension benefits payments |  |  |
2017 | 74 |  |
2018 | 77 |  |
2019 | 82 |  |
2020 | 84 |  |
2021 | 89 |  |
2022-2026 | 483 |  |
Transocean Plans |  |  |
Fair value of plan assets |  |  |
Total investments | 1,604 | 1,637 |
Defined benefit plan contributions funded by cash flows from operations |  |  |
Expected defined plan contributions next year | 11 |  |
Transocean Plans | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 1,200 | 1,197 |
Transocean Plans | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 404 | 440 |
Transocean Plans | Mutual funds |  |  |
Fair value of plan assets |  |  |
Total investments | 1,561 | 1,524 |
Transocean Plans | Mutual funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 1,196 | 1,191 |
Transocean Plans | Mutual funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 365 | 333 |
Transocean Plans | U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments | 518 | 495 |
Transocean Plans | U.S. equity funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 516 | 459 |
Transocean Plans | U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 | 36 |
Transocean Plans | Non-U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments | 298 | 288 |
Transocean Plans | Non-U.S. equity funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 113 | 106 |
Transocean Plans | Non-U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 185 | 182 |
Transocean Plans | Bond funds |  |  |
Fair value of plan assets |  |  |
Total investments | 745 | 741 |
Transocean Plans | Bond funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 567 | 626 |
Transocean Plans | Bond funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 178 | 115 |
Transocean Plans | Other investments |  |  |
Fair value of plan assets |  |  |
Total investments | 43 | 113 |
Transocean Plans | Other investments | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 4 | 6 |
Transocean Plans | Other investments | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 39 | 107 |
Transocean Plans | Cash and money market funds |  |  |
Fair value of plan assets |  |  |
Total investments | 4 | 6 |
Transocean Plans | Cash and money market funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 4 | 6 |
Transocean Plans | Property collective trusts |  |  |
Fair value of plan assets |  |  |
Total investments | 17 | 20 |
Transocean Plans | Property collective trusts | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 17 | 20 |
Transocean Plans | Investment contracts |  |  |
Fair value of plan assets |  |  |
Total investments | 22 | 87 |
Transocean Plans | Investment contracts | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | $ 22 | $ 87 |
U.S. Plans |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 100.00% | 100.00% |
Total actual allocation percentage | 100.00% | 100.00% |
Fair value of plan assets |  |  |
Total investments | $ 1,204 | $ 1,198 | 1,271
Projected pension benefits payments |  |  |
2017 | 64 |  |
2018 | 68 |  |
2019 | 71 |  |
2020 | 74 |  |
2021 | 78 |  |
2022-2026 | 417 |  |
U.S. Plans | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 1,198 | 1,195 |
U.S. Plans | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 6 | 3 |
U.S. Plans | Mutual funds |  |  |
Fair value of plan assets |  |  |
Total investments | 1,202 | 1,192 |
U.S. Plans | Mutual funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 1,196 | 1,189 |
U.S. Plans | Mutual funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 6 | 3 |
U.S. Plans | U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments | 518 | 459 |
U.S. Plans | U.S. equity funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 516 | 459 |
U.S. Plans | U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 |  |
U.S. Plans | Non-U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments | 117 | 107 |
U.S. Plans | Non-U.S. equity funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 113 | 104 |
U.S. Plans | Non-U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 4 | 3 |
U.S. Plans | Bond funds |  |  |
Fair value of plan assets |  |  |
Total investments | 567 | 626 |
U.S. Plans | Bond funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | $ 567 | $ 626 |
U.S. Plans | Investment grade fixed income |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 50.00% | 50.00% |
Total actual allocation percentage | 47.00% | 52.00% |
U.S. Plans | Other investments |  |  |
Weighted-average target allocations of the investments |  |  |
Total actual allocation percentage |  | 1.00% |
Fair value of plan assets |  |  |
Total investments | $ 2 | $ 6 |
U.S. Plans | Other investments | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 | 6 |
U.S. Plans | Cash and money market funds |  |  |
Fair value of plan assets |  |  |
Total investments | 2 | 6 |
U.S. Plans | Cash and money market funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | $ 2 | $ 6 |
U.S. Plans | Equity securities |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 50.00% | 50.00% |
Total actual allocation percentage | 53.00% | 47.00% |
Non-U.S. Plans |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 100.00% | 100.00% |
Total actual allocation percentage | 100.00% | 100.00% |
Fair value of plan assets |  |  |
Total investments | $ 400 | $ 439 | $ 488
Projected pension benefits payments |  |  |
2017 | 7 |  |
2018 | 6 |  |
2019 | 8 |  |
2020 | 8 |  |
2021 | 9 |  |
2022-2026 | 59 |  |
Non-U.S. Plans | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 | 2 |
Non-U.S. Plans | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 398 | 437 |
Non-U.S. Plans | Mutual funds |  |  |
Fair value of plan assets |  |  |
Total investments | 359 | 332 |
Non-U.S. Plans | Mutual funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments |  | 2 |
Non-U.S. Plans | Mutual funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 359 | 330 |
Non-U.S. Plans | U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments |  | 36 |
Non-U.S. Plans | U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments |  | 36 |
Non-U.S. Plans | Non-U.S. equity funds |  |  |
Fair value of plan assets |  |  |
Total investments | 181 | 181 |
Non-U.S. Plans | Non-U.S. equity funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments |  | 2 |
Non-U.S. Plans | Non-U.S. equity funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 181 | 179 |
Non-U.S. Plans | Bond funds |  |  |
Fair value of plan assets |  |  |
Total investments | 178 | 115 |
Non-U.S. Plans | Bond funds | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | $ 178 | $ 115 |
Non-U.S. Plans | Investment grade fixed income |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 45.00% | 16.00% |
Total actual allocation percentage | 44.00% | 26.00% |
Non-U.S. Plans | Other investments |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 10.00% | 28.00% |
Total actual allocation percentage | 11.00% | 25.00% |
Fair value of plan assets |  |  |
Total investments | $ 41 | $ 107 |
Non-U.S. Plans | Other investments | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 |  |
Non-U.S. Plans | Other investments | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 39 | 107 |
Non-U.S. Plans | Cash and money market funds |  |  |
Fair value of plan assets |  |  |
Total investments | 2 |  |
Non-U.S. Plans | Cash and money market funds | Significant observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 2 |  |
Non-U.S. Plans | Property collective trusts |  |  |
Fair value of plan assets |  |  |
Total investments | 17 | 20 |
Non-U.S. Plans | Property collective trusts | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | 17 | 20 |
Non-U.S. Plans | Investment contracts |  |  |
Fair value of plan assets |  |  |
Total investments | 22 | 87 |
Non-U.S. Plans | Investment contracts | Significant other observable inputs |  |  |
Fair value of plan assets |  |  |
Total investments | $ 22 | $ 87 |
Non-U.S. Plans | Equity securities |  |  |
Weighted-average target allocations of the investments |  |  |
Total target allocation percentage | 45.00% | 56.00% |
Total actual allocation percentage | 45.00% | 49.00% |
OPEB Plans |  |  |
Defined benefit plan contributions funded by cash flows from operations |  |  |
Expected defined plan contributions next year | $ 3 |  |
Projected pension benefits payments |  |  |
2017 | 3 |  |
2018 | 3 |  |
2019 | 3 |  |
2020 | 2 |  |
2021 | 2 |  |
2022-2026 | $ 7 |  |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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