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Business (Details) | Dec. 31, 2019 item
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Number of mobile offshore drilling units | 45
Ultra-deepwater floaters |
Number of mobile offshore drilling units | 28
Number of mobile offshore drilling units under construction | 2
Harsh environment floaters |
Number of mobile offshore drilling units | 14
Midwater floaters |
Number of mobile offshore drilling units | 3

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- Definition Number of mobile offshore drilling units. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of mobile offshore drilling units under construction we own, had partial ownership interests in or operated at the measurement date. + References No definition available. + Details
Name: | rig_NumberOfMobileOffshoreDrillingUnitsUnderConstruction
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=rig_UltraDeepwaterFloatersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=rig_HarshEnvironmentFloatersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=rig_MidwaterFloaterAssetGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |