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Postemployment Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Postemployment Benefit Plans |
Schedule of weighted-average assumptions | Assumptions—We estimated our benefit obligations using the following weighted-average assumptions:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | December 31, 2019 | ​ | December 31, 2018 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |
Discount rate | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 3.27 | % | 2.13 | % | 2.39 | % | 4.31 | % | 2.86 | % | 3.56 | %
Compensation trend rate | ​ | ​ | ​ | ​ | ​ | ​ | ​ | na | ​ | 2.25 | % | na | ​ | na | ​ | 2.75 | % | na | ​
We estimated our net periodic benefit costs using the following weighted-average assumptions:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, 2019 | ​ | Year ended December 31, 2018 | ​ | Year ended December 31, 2017 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | U.S. | ​ | Non-U.S. |  | ​ | ​
​ |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | OPEB Plans | ​
Discount rate | ​ | 4.32 | % | 2.86 | % | 3.56 | % | 3.68 | % | 2.49 | % | 2.93 | % | 4.26 | % | 2.69 | % | 3.08 | %
Expected rate of return | ​ | 6.20 | % | 4.39 | % | na | ​ | 6.21 | % | 4.72 | % | na | ​ | 6.31 | % | 4.79 | % | na | ​
Compensation trend rate | ​ | na | ​ | 2.75 | % | na | ​ | na | ​ | 2.50 | % | na | ​ | na | ​ | 2.25 | % | na | ​
“na” means not applicable.
Schedule of Net Periodic Benefit Costs Before Tax | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, 2019 | ​ | Year ended December 31, 2018 | ​ | Year ended December 31, 2017 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |
Net periodic benefit costs | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | $ | — | ​ | $ | 7 | ​ | $ | — | ​ | $ | 7 | ​ | $ | — | ​ | $ | 7 | ​ | $ | — | ​ | $ | 7 | ​ | $ | 3 | ​ | $ | 3 | ​ | $ | — | ​ | $ | 6 | ​
Interest cost | ​ | ​ | 63 | ​ | ​ | 10 | ​ | ​ | 1 | ​ | ​ | 74 | ​ | ​ | 61 | ​ | ​ | 10 | ​ | ​ | 1 | ​ | ​ | 72 | ​ | ​ | 65 | ​ | ​ | 11 | ​ | ​ | — | ​ | ​ | 76 | ​
Expected return on plan assets | ​ | ​ | (71) | ​ | ​ | (17) | ​ | ​ | — | ​ | ​ | (88) | ​ | ​ | (72) | ​ | ​ | (19) | ​ | ​ | — | ​ | ​ | (91) | ​ | ​ | (74) | ​ | ​ | (20) | ​ | ​ | — | ​ | ​ | (94) | ​
Special termination benefits | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1 | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​
Settlements and curtailments | ​ | ​ | 1 | ​ | ​ | 2 | ​ | ​ | — | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | (4) | ​ | ​ | (5) | ​ | ​ | — | ​ | ​ | 13 | ​ | ​ | — | ​ | ​ | 13 | ​
Actuarial loss, net | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3 | ​ | ​ | 8 | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 9 | ​ | ​ | 5 | ​ | ​ | 1 | ​ | ​ | 1 | ​ | ​ | 7 | ​
Prior service gain, net | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2) | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2) | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (3) | ​ | ​ | (3) | ​
Net periodic benefit costs (income) | ​ | $ | (4) | ​ | $ | 2 | ​ | $ | (1) | ​ | $ | (3) | ​ | $ | (3) | ​ | $ | (2) | ​ | $ | (4) | ​ | $ | (9) | ​ | $ | (1) | ​ | $ | 8 | ​ | $ | (2) | ​ | $ | 5 | ​
Schedule of changes in projected benefit obligation, plan assets and funded status and the amounts recognized on consolidated balance sheets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, 2019 | ​ | Year ended December 31, 2018 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |
Change in projected benefit obligation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Projected benefit obligation, beginning of period |  | $ | 1,527 | ​ | $ | 338 | ​ | $ | 17 | ​ | $ | 1,882 | ​ | $ | 1,680 | ​ | $ | 379 | ​ | $ | 19 | ​ | $ | 2,078 | ​
Assumed projected benefit obligation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 29 | ​ | ​ | — | ​ | ​ | 29 | ​
Actuarial (gains) losses, net | ​ | ​ | 202 | ​ | ​ | 45 | ​ | ​ | 1 | ​ | ​ | 248 | ​ | ​ | (145) | ​ | ​ | (45) | ​ | ​ | (2) | ​ | ​ | (192) | ​
Service cost | ​ | ​ | — | ​ | ​ | 7 | ​ | ​ | — | ​ | ​ | 7 | ​ | ​ | — | ​ | ​ | 7 | ​ | ​ | — | ​ | ​ | 7 | ​
Interest cost | ​ | ​ | 63 | ​ | ​ | 10 | ​ | ​ | 1 | ​ | ​ | 74 | ​ | ​ | 61 | ​ | ​ | 10 | ​ | ​ | 1 | ​ | ​ | 72 | ​
Currency exchange rate changes | ​ | ​ | — | ​ | ​ | 14 | ​ | ​ | — | ​ | ​ | 14 | ​ | ​ | — | ​ | ​ | (21) | ​ | ​ | — | ​ | ​ | (21) | ​
Benefits paid | ​ | ​ | (72) | ​ | ​ | (19) | ​ | ​ | (2) | ​ | ​ | (93) | ​ | ​ | (69) | ​ | ​ | (19) | ​ | ​ | (2) | ​ | ​ | (90) | ​
Settlements | ​ | ​ | (24) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (24) | ​ | ​ | — | ​ | ​ | (3) | ​ | ​ | — | ​ | ​ | (3) | ​
Plan amendment | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 1 | ​
Special termination benefit | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1 | ​ | ​ | 1 | ​
Projected benefit obligation, end of period | ​ | ​ | 1,696 | ​ | ​ | 395 | ​ | ​ | 17 | ​ | ​ | 2,108 | ​ | ​ | 1,527 | ​ | ​ | 338 | ​ | ​ | 17 | ​ | ​ | 1,882 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in plan assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets, beginning of period | ​ | ​ | 1,189 | ​ | ​ | 378 | ​ | ​ | — | ​ | ​ | 1,567 | ​ | ​ | 1,343 | ​ | ​ | 393 | ​ | ​ | — | ​ | ​ | 1,736 | ​
Fair value of acquired plan assets | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 22 | ​ | ​ | — | ​ | ​ | 22 | ​
Actual return on plan assets | ​ | ​ | 272 | ​ | ​ | 39 | ​ | ​ | — | ​ | ​ | 311 | ​ | ​ | (87) | ​ | ​ | (6) | ​ | ​ | — | ​ | ​ | (93) | ​
Currency exchange rate changes | ​ | ​ | — | ​ | ​ | 16 | ​ | ​ | — | ​ | ​ | 16 | ​ | ​ | — | ​ | ​ | (22) | ​ | ​ | — | ​ | ​ | (22) | ​
Employer contributions | ​ | ​ | 4 | ​ | ​ | 16 | ​ | ​ | 2 | ​ | ​ | 22 | ​ | ​ | 2 | ​ | ​ | 13 | ​ | ​ | 2 | ​ | ​ | 17 | ​
Benefits paid | ​ | ​ | (72) | ​ | ​ | (19) | ​ | ​ | (2) | ​ | ​ | (93) | ​ | ​ | (69) | ​ | ​ | (19) | ​ | ​ | (2) | ​ | ​ | (90) | ​
Settlements | ​ | ​ | (24) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (24) | ​ | ​ | — | ​ | ​ | (3) | ​ | ​ | — | ​ | ​ | (3) | ​
Fair value of plan assets, end of period | ​ | ​ | 1,369 | ​ | ​ | 430 | ​ | ​ | — | ​ | ​ | 1,799 | ​ | ​ | 1,189 | ​ | ​ | 378 | ​ | ​ | — | ​ | ​ | 1,567 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Funded status, end of period |  | $ | (327) | ​ | $ | 35 | ​ | $ | (17) | ​ | $ | (309) | ​ | $ | (338) | ​ | $ | 40 | ​ | $ | (17) | ​ | $ | (315) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance sheet classification, end of period: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pension asset, non-current |  | $ | — | ​ | $ | 42 | ​ | $ | — | ​ | $ | 42 | ​ | $ | — | ​ | $ | 47 | ​ | $ | — | ​ | $ | 47 | ​
Pension liability, current | ​ | ​ | (1) | ​ | ​ | (1) | ​ | ​ | (3) | ​ | ​ | (5) | ​ | ​ | (3) | ​ | ​ | (1) | ​ | ​ | (3) | ​ | ​ | (7) | ​
Pension liability, non-current | ​ | ​ | (326) | ​ | ​ | (6) | ​ | ​ | (14) | ​ | ​ | (346) | ​ | ​ | (335) | ​ | ​ | (6) | ​ | ​ | (14) | ​ | ​ | (355) | ​
Accumulated other comprehensive loss (income), before taxes | ​ | ​ | 304 | ​ | ​ | 84 | ​ | ​ | (12) | ​ | ​ | 376 | ​ | ​ | 307 | ​ | ​ | 64 | ​ | ​ | (15) | ​ | ​ | 356 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated benefit obligation, end of period | ​ | $ | 1,696 | ​ | $ | 385 | ​ | $ | 17 | ​ | $ | 2,098 | ​ | $ | 1,527 | ​ | $ | 328 | ​ | $ | 17 | ​ | $ | 1,872 | ​
Schedule of aggregate projected benefit obligation and fair value of plan assets for plans with a projected benefit obligation in excess of plan assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | December 31, 2018 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |
Projected benefit obligation |  | $ | 1,696 | ​ | $ | 56 | ​ | $ | 17 | ​ | $ | 1,769 | ​ | $ | 1,527 | ​ | $ | 26 | ​ | $ | 17 | ​ | $ | 1,570 | ​
Fair value of plan assets | ​ | ​ | 1,369 | ​ | ​ | 49 | ​ | ​ | — | ​ | ​ | 1,418 | ​ | ​ | 1,189 | ​ | ​ | 20 | ​ | ​ | — | ​ | ​ | 1,209 | ​
Schedule of aggregate accumulated benefit obligation and fair value of plan assets for plans with an accumulated benefit obligation in excess of plan assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | December 31, 2018 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |
Accumulated benefit obligation |  | $ | 1,696 | ​ | $ | 1 | ​ | $ | 17 | ​ | $ | 1,714 | ​ | $ | 1,527 | ​ | $ | 3 | ​ | $ | 17 | ​ | $ | 1,547 | ​
Fair value of plan assets | ​ | ​ | 1,369 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,369 | ​ | ​ | 1,189 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,189 | ​
Schedule of amounts in accumulated other comprehensive income, before tax, that have not been recognized as components of net periodic benefit costs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | December 31, 2018 |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |  | Plans |  | Plans |  | Plans |  | Total |
Actuarial loss, net |  | $ | 304 | ​ | $ | 84 | ​ | $ | 2 | ​ | $ | 390 | ​ | $ | 307 | ​ | $ | 63 | ​ | $ | 1 | ​ | $ | 371 | ​
Prior service cost, net | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (14) | ​ | ​ | (14) | ​ | ​ | — | ​ | ​ | 1 | ​ | ​ | (16) | ​ | ​ | (15) | ​
Accumulated other comprehensive loss (income), before taxes |  | $ | 304 | ​ | $ | 84 | ​ | $ | (12) | ​ | $ | 376 | ​ | $ | 307 | ​ | $ | 64 | ​ | $ | (15) | ​ | $ | 356 | ​
Schedule of amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit costs in next fiscal year | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Year ending December 31, 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Plans |  | Plans |  | Plans |  | Total |
Actuarial loss, net | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | $ | 9 | ​ | $ | 1 | ​ | $ | — | ​ | $ | 10 | ​
Prior service cost, net | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2) | ​ | ​ | (2) | ​
Total amount expected to be recognized | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | $ | 9 | ​ | $ | 1 | ​ | $ | (2) | ​ | $ | 8 | ​
Schedule of allocations and fair value of plan assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | December 31, 2019 | ​ | December 31, 2018 |
​ | ​ | Target allocation | ​ | Actual allocation | ​ | Target allocation | ​ | Actual allocation |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | U.S. | ​ | Non-U.S. | ​ | U.S. | ​ | Non-U.S. | ​ | U.S. | ​ | Non-U.S. |
​ |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |
Equity securities | ​ | 50 | % | 24 | % | 51 | % | 27 | % | 50 | % | 34 | % | 50 | % | 32 | %
Fixed income securities | ​ | 50 | % | 60 | % | 49 | % | 56 | % | 50 | % | 51 | % | 50 | % | 52 | %
Other investments | ​ | — | % | 16 | % | — | % | 17 | % | — | ​ | 15 | % | — | ​ | 16 | %
Total | ​ | 100 | % | 100 | % | 100 | % | 100 | % | 100 | % | 100 | % | 100 | % | 100 | %
The investments for the funded Transocean Plans were categorized as follows (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 |
​ | ​ | Significant observable inputs | ​ | Significant other observable inputs | ​ | Total |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean |
​ |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |
Mutual funds | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. equity funds |  | $ | 480 | ​ | $ | — | ​ | $ | 480 | ​ | $ | 1 | ​ | $ | — | ​ | $ | 1 | ​ | $ | 481 | ​ | $ | — | ​ | $ | 481 | ​
Non-U.S. equity funds | ​ | ​ | 216 | ​ | ​ | — | ​ | ​ | 216 | ​ | ​ | 5 | ​ | ​ | 115 | ​ | ​ | 120 | ​ | ​ | 221 | ​ | ​ | 115 | ​ | ​ | 336 | ​
Bond funds | ​ | ​ | 656 | ​ | ​ | — | ​ | ​ | 656 | ​ | ​ | 6 | ​ | ​ | 240 | ​ | ​ | 246 | ​ | ​ | 662 | ​ | ​ | 240 | ​ | ​ | 902 | ​
Total mutual funds | ​ | ​ | 1,352 | ​ | ​ | — | ​ | ​ | 1,352 | ​ | ​ | 12 | ​ | ​ | 355 | ​ | ​ | 367 | ​ | ​ | 1,364 | ​ | ​ | 355 | ​ | ​ | 1,719 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other investments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and money market funds | ​ | ​ | 5 | ​ | ​ | 4 | ​ | ​ | 9 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 5 | ​ | ​ | 4 | ​ | ​ | 9 | ​
Property collective trusts | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 20 | ​ | ​ | 20 | ​ | ​ | — | ​ | ​ | 20 | ​ | ​ | 20 | ​
Investment contracts | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 51 | ​ | ​ | 51 | ​ | ​ | — | ​ | ​ | 51 | ​ | ​ | 51 | ​
Total other investments | ​ | ​ | 5 | ​ | ​ | 4 | ​ | ​ | 9 | ​ | ​ | — | ​ | ​ | 71 | ​ | ​ | 71 | ​ | ​ | 5 | ​ | ​ | 75 | ​ | ​ | 80 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total investments |  | $ | 1,357 | ​ | $ | 4 | ​ | $ | 1,361 | ​ | $ | 12 | ​ | $ | 426 | ​ | $ | 438 | ​ | $ | 1,369 | ​ | $ | 430 | ​ | $ | 1,799 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2018 |
​ | ​ | Significant observable inputs | ​ | Significant other observable inputs | ​ | Total |
​ | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean | ​ | U.S. | ​ | Non-U.S. | ​ | Transocean |
​ |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |  | Plans |
Mutual funds | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. equity funds |  | $ | 401 | ​ | $ | — | ​ | $ | 401 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 401 | ​ | $ | — | ​ | $ | 401 | ​
Non-U.S. equity funds | ​ | ​ | 179 | ​ | ​ | — | ​ | ​ | 179 | ​ | ​ | 5 | ​ | ​ | 120 | ​ | ​ | 125 | ​ | ​ | 184 | ​ | ​ | 120 | ​ | ​ | 304 | ​
Bond funds | ​ | ​ | 591 | ​ | ​ | — | ​ | ​ | 591 | ​ | ​ | 7 | ​ | ​ | 195 | ​ | ​ | 202 | ​ | ​ | 598 | ​ | ​ | 195 | ​ | ​ | 793 | ​
Total mutual funds | ​ | ​ | 1,171 | ​ | ​ | — | ​ | ​ | 1,171 | ​ | ​ | 12 | ​ | ​ | 315 | ​ | ​ | 327 | ​ | ​ | 1,183 | ​ | ​ | 315 | ​ | ​ | 1,498 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other investments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and money market funds | ​ | ​ | 6 | ​ | ​ | 1 | ​ | ​ | 7 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6 | ​ | ​ | 1 | ​ | ​ | 7 | ​
Property collective trusts | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 19 | ​ | ​ | 19 | ​ | ​ | — | ​ | ​ | 19 | ​ | ​ | 19 | ​
Investment contracts | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 43 | ​ | ​ | 43 | ​ | ​ | — | ​ | ​ | 43 | ​ | ​ | 43 | ​
Total other investments | ​ | ​ | 6 | ​ | ​ | 1 | ​ | ​ | 7 | ​ | ​ | — | ​ | ​ | 62 | ​ | ​ | 62 | ​ | ​ | 6 | ​ | ​ | 63 | ​ | ​ | 69 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total investments |  | $ | 1,177 | ​ | $ | 1 | ​ | $ | 1,178 | ​ | $ | 12 | ​ | $ | 377 | ​ | $ | 389 | ​ | $ | 1,189 | ​ | $ | 378 | ​ | $ | 1,567 | ​
Schedule of projected benefits payments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. | ​ | Non-U.S. | ​ | OPEB | ​ | ​ | ​ |
​ |  | Plans |  | Plans |  | Plans |  | Total |
Years ending December 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2020 |  | $ | 79 | ​ | $ | 8 | ​ | $ | 3 | ​ | $ | 90 | ​
2021 | ​ | ​ | 79 | ​ | ​ | 8 | ​ | ​ | 3 | ​ | ​ | 90 | ​
2022 | ​ | ​ | 81 | ​ | ​ | 8 | ​ | ​ | 3 | ​ | ​ | 92 | ​
2023 | ​ | ​ | 82 | ​ | ​ | 9 | ​ | ​ | 2 | ​ | ​ | 93 | ​
2024 | ​ | ​ | 82 | ​ | ​ | 10 | ​ | ​ | 3 | ​ | ​ | 95 | ​
2025 - 2029 | ​ | ​ | 419 | ​ | ​ | 59 | ​ | ​ | 3 | ​ | ​ | 481 | ​

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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