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Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
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May 31, 2012
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Dec. 31, 2012
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Feb. 29, 2012
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Oct. 18, 2007
item
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| Related Party Transactions | ||||
| Number of Ultra-Deepwater Floaters | 2 | |||
| Ownership interest in unconsolidated joint venture (as a percent) | 50.00% | 50.00% | ||
| Issuance of shares in exchange for noncontrolling interest | 8.7 | 8.7 | ||
| Final cash payment for settlement of noncontrolling interest | $ 72 | |||
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TPDI
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| Related Party Transactions | ||||
| Ownership interest in affiliate (as a percent) | 50.00% | |||
| Ownership interest in unconsolidated joint venture (as a percent) | 50.00% | |||
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Quantum Pacific Management Limited
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| Related Party Transactions | ||||
| Number of Ultra-Deepwater Floaters | 2 |