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Noncontrolling Interest (Details) $ in Millions |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 09, 2016 shares | Aug. 05, 2014 shares | Jul. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) shares | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jun. 30, 2016 | Nov. 04, 2015 USD ($)
Noncontrolling interest |  |  |  |  |  |  |  |
Distribution to holders of noncontrolling interest |  |  |  | $ 30 | $ 29 | $ 5 |  |
Total number of securities issued in merger | shares | 1.20 |  |  |  |  |  |  |
Total number of securities issued in merger | shares | 23,800,000 |  |  |  |  |  |  |
TDSOI |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Increase (decrease) in amount |  |  | $ 12 |  |  |  |  |
Ownership interest held by minority interest (as a percent) |  |  |  |  |  |  | 30.00% |
Cash payment for repurchase of noncontrolling interest |  |  | $ 2 |  |  |  |  |
Unit repurchase program |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Authorized repurchase amount |  |  |  |  |  |  |  | $ 40
Transocean Partners |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Common units offered in initial public offering | shares |  | 20,100,000 |  |  |  |  |  |
Common units held by parent | shares |  | 21,300,000 |  |  |  |  |  |
Subordinated units held by parent | shares |  | 27,600,000 |  |  |  |  |  |
Percentage of limited liability company interest held by parent |  | 70.8 |  |  |  |  |  |
Net cash proceeds from offering |  |  |  |  |  | 417 |  |
Underwriting discounts, commissions and offering costs |  |  |  |  |  | 26 |  |
Dividends |  |  |  | 99 | 100 | 15 |  |
Distribution to holders of noncontrolling interest |  |  |  | $ 28 | 29 | 4 |  |
Shares repurchased (in shares) | shares |  |  |  | 478,376 |  |  |  |
Value of shares repurchased |  |  |  | $ 4 |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Increase (decrease) in amount |  |  |  | $ 18 | $ (9) | (33) |  |
Noncontrolling interest | Transocean Partners |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |
Increase (decrease) in amount |  |  |  |  |  | $ 44 |  |

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