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Drilling Fleet (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Dispositions |  |  |
Net cash proceeds from sale of assets | $ 7 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | $ 91 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment |
Loss on disposal of assets, net | (7)us-gaap_GainLossOnDispositionOfAssets | (3)us-gaap_GainLossOnDispositionOfAssets |
Aggregate carrying amount of assets held for sale |  |  | 25 us-gaap_AssetsHeldForSaleLongLived
Assets of discontinued operations |  |  | 2 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Sale of Deepwater Floater Discoverer Seven Seas and the Midwater Floater C. Kirk Rhein, Jr. along with related equipment |  |  |
Dispositions |  |  |
Net cash proceeds from sale of assets | 5 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfDeepwaterFloaterDiscovererSevenSeasAndMidwaterFloaterC.KirkRheinJr.WithRelatedEquipmentMember |  |
Assets held for sale of Ultra-Deepwater Floater Deepwater Expedition, the Deepwater Floaters, Sedco 707, Sedco 710 Sovereign Explorer and Transocean Rather and the Midwater Floaters, Falcon 100, GSF Aleutian Key, GSF Arctic I, GSF Arctic III, J.W. McLean, Sedco 601, Sedco 700, Sedneth 701 and Transocean Legend, along with related equipment |  |  |
Dispositions |  |  |
Aggregate carrying amount of assets held for sale | 23 us-gaap_AssetsHeldForSaleLongLived / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_UltraDWFExpeditionSedco707710SovereignExplorerTORatherMWFFalcon100GSFArcticiandIIIJ.W.McleanSedco601700Sedneth701TOLegendRelatedEquipmentMember |  |
Assets Held For Sale Deepwater Floaters Discoverer Seven Seas, Sedco 710 and Sovereign Explorer and the Midwater Floaters Sedneth 701, C. Kirk Rhein, Jr, Falcon 100, GSF Arctic I, J.W. McLean, Sedco 601 and Sedco 700 with related equipment |  |  |
Dispositions |  |  |
Aggregate carrying amount of assets held for sale |  |  | 23 us-gaap_AssetsHeldForSaleLongLived / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_AssetsHeldForSaleDeepwaterFloatersSedco710AndSovereignExplorerAndMidwaterFloatersFalcon100GsfArcticIJ.w.McleanSedco601AndSedco700WithRelatedEquipmentMember
Sale of other assets |  |  |
Dispositions |  |  |
Net cash proceeds from sale of assets | 2 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfOtherAssetsMember | 8 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfOtherAssetsMember |
Loss on disposal of assets, net | (9)us-gaap_GainLossOnDispositionOfAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfOtherAssetsMember | (3)us-gaap_GainLossOnDispositionOfAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfOtherAssetsMember |
Sale of the High Specification Jackup GSF Monitor along with related equipment |  |  |
Dispositions |  |  |
Net cash proceeds from sale of assets |  | $ 83 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = rig_SaleOfHighSpecificationJackupGSFMonitorWithRelatedEquipmentMember |

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- Definition Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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- Definition The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for assets of a disposal group, including a component of the entity (discontinued operation), to be sold or that has been disposed of through sale, as of the financial statement date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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