v2.4.0.8

Drilling Fleet (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Sale of the High Specification Jackup GSF Monitor along with related equipment	Jun. 30, 2014 Sale of other assets	Jun. 30, 2013 Sale of other assets	Jun. 30, 2014 Sale of other assets	Jun. 30, 2013 Sale of other assets	Jun. 30, 2014 Assets held for sale of Deepwater Floater Sedco 709 and the Midwater Floaters C. Kirk Rhein, Jr., Falcon 100, Sedco 703 and Sedneth 701 and the High Specification Jackup GSF Magellan, along with related equipment	Dec. 31, 2013 Assets Held for Sale Deepwater Floater Sedco 709 and Midwater Floaters C. Kirk Rhein Jr., Falcon 100 and Sedco 703 and the High Specification Jackup GSF Monitor along with related equipment
Dispositions
Net cash proceeds from sale of assets	$ 10	$ 3	$ 101	$ 4	$ 83	$ 9	$ 3	$ 17	$ 3
Gain (loss) on the sale of assets	1	(2)	(2)	(9)		1	(2)	(2)	(9)
Aggregate carrying amount of assets held for sale										$ 148	$ 129

X

- Details

Name:	rig_DispositionsAbstract
Namespace Prefix:	rig_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_AssetsHeldForSaleLongLived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

+ Details

Name:	us-gaap_GainLossOnDispositionOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration