v2.4.0.8

Debt (Details)																																						6 Months Ended	3 Months Ended	6 Months Ended		6 Months Ended
	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2014 4.95% Senior Notes due November 2015 USD ($)	Dec. 31, 2013 4.95% Senior Notes due November 2015 USD ($)	Jun. 30, 2014 5.05% Senior Notes due December 2016 USD ($)	Dec. 31, 2013 5.05% Senior Notes due December 2016 USD ($)	Jun. 30, 2014 2.5% Senior Notes due October 2017 USD ($)	Dec. 31, 2013 2.5% Senior Notes due October 2017 USD ($)	Dec. 31, 2013 ADDCL Credit Facilities due December 2017 USD ($)	Jun. 30, 2014 Eksportfinans Loans due January 2018 USD ($)	Jun. 30, 2014 Eksportfinans Loans due January 2018 NOK	Dec. 31, 2013 Eksportfinans Loans due January 2018 USD ($)	Dec. 31, 2013 Eksportfinans Loans due January 2018 NOK	Jun. 30, 2014 6.00% Senior Notes due March 2018 USD ($)	Dec. 31, 2013 6.00% Senior Notes due March 2018 USD ($)	Jun. 30, 2014 7.375% Senior Notes due April 2018 USD ($)	Dec. 31, 2013 7.375% Senior Notes due April 2018 USD ($)	Jun. 30, 2014 6.50% Senior Notes due November 2020 USD ($)	Dec. 31, 2013 6.50% Senior Notes due November 2020 USD ($)	Jun. 30, 2014 6.375% Senior Notes due December 2021 USD ($)	Dec. 31, 2013 6.375% Senior Notes due December 2021 USD ($)	Jun. 30, 2014 3.8% Senior Notes due October 2022 USD ($)	Dec. 31, 2013 3.8% Senior Notes due October 2022 USD ($)	Jun. 30, 2014 7.45% Notes due April 2027 USD ($)	Dec. 31, 2013 7.45% Notes due April 2027 USD ($)	Jun. 30, 2014 8% Debentures due April 2027 USD ($)	Dec. 31, 2013 8% Debentures due April 2027 USD ($)	Jun. 30, 2014 7% Notes due June 2028 USD ($)	Dec. 31, 2013 7% Notes due June 2028 USD ($)	Jun. 30, 2014 Capital lease contract due August 2029 USD ($)	Dec. 31, 2013 Capital lease contract due August 2029 USD ($)	Jun. 30, 2014 7.5% Notes due April 2031 USD ($)	Dec. 31, 2013 7.5% Notes due April 2031 USD ($)	Jun. 30, 2014 6.80% Senior Notes due March 2038 USD ($)	Dec. 31, 2013 6.80% Senior Notes due March 2038 USD ($)	Jun. 30, 2014 7.35% Senior Notes due December 2041 USD ($)	Dec. 31, 2013 7.35% Senior Notes due December 2041 USD ($)	Jun. 30, 2014 Former Three Year Secured Revolving Credit Facility USD ($)	Jun. 30, 2014 Former Three Year Secured Revolving Credit Facility Deepwater Champion, Discoverer Americas and Discoverer Inspiration USD ($)	Jun. 30, 2014 Former Three Year Secured Revolving Credit Facility Deepwater Champion, Discoverer Americas and Discoverer Inspiration USD ($)	Dec. 31, 2013 Former Three Year Secured Revolving Credit Facility Deepwater Champion, Discoverer Americas and Discoverer Inspiration USD ($)	Jun. 30, 2014 Former Five Year Revolving Credit Facility USD ($)	Jun. 30, 2014 New Five Year Revolving Credit Facility USD ($)	Jun. 30, 2014 New Five Year Revolving Credit Facility Adjusted LIBOR	Jun. 30, 2014 New Five Year Revolving Credit Facility Base Rate	Jun. 30, 2014 New Five Year Revolving Credit Facility Minimum	Jun. 30, 2014 New Five Year Revolving Credit Facility Minimum Adjusted LIBOR	Jun. 30, 2014 New Five Year Revolving Credit Facility Maximum	Jun. 30, 2014 New Five Year Revolving Credit Facility Maximum Adjusted LIBOR	Jun. 30, 2014 Transocean Ltd. and Subsidiaries	Dec. 31, 2013 ADDCL ADDCL Credit Facilities due December 2017 USD ($)	Jun. 30, 2014 ADDCL ADDCL Credit Facilities Tranche A Due December 2017 USD ($)	Jun. 30, 2014 ADDCL ADDCL Credit Facilities Tranche C Due December 2017 USD ($)	Jun. 30, 2014 ADDCL ADDCL Secondary Loan Facility Due December 2015 USD ($)	Dec. 31, 2013 ADDCL ADDCL Secondary Loan Facility Due December 2015 USD ($)
Long-term debt by current and noncurrent
Total debt	$ 10,457,000,000	$ 10,702,000,000	$ 1,109,000,000	$ 1,113,000,000	$ 999,000,000	$ 999,000,000	$ 748,000,000	$ 748,000,000	$ 163,000,000	$ 517,000,000		$ 591,000,000		$ 1,002,000,000	$ 998,000,000	$ 247,000,000	$ 247,000,000	$ 903,000,000	$ 900,000,000	$ 1,199,000,000	$ 1,199,000,000	$ 746,000,000	$ 745,000,000	$ 97,000,000	$ 97,000,000	$ 57,000,000	$ 57,000,000	$ 310,000,000	$ 311,000,000	$ 626,000,000	$ 637,000,000	$ 598,000,000	$ 598,000,000	$ 999,000,000	$ 999,000,000	$ 300,000,000	$ 300,000,000
Debt due within one year	159,000,000	323,000,000							163,000,000	138,000,000		140,000,000																		21,000,000	20,000,000
Long-term debt	10,298,000,000	10,379,000,000
Debt instrument interest rate stated percentage			4.95%		5.05%		2.50%							6.00%		7.375%		6.50%		6.375%		3.80%		7.45%		8.00%		7.00%				7.50%		6.80%		7.35%
Percentage ownership interest in Transocean Inc. by Transocean Ltd.																																																		100.00%
Credit facility term																																						3 years				5 years	5 years
Borrowing capacity, maximum										519,000,000	3,200,000,000	594,000,000	3,600,000,000																									900,000,000				2,000,000,000	3,000,000,000									215,000,000	399,000,000	90,000,000
Basis of variable interest rate																																												LIBOR	Base rate
Spread on variable rate basis (as a percent)																																											1.50%				1.125%		2.00%
Percentage reduction to the calculated variable rate																																													1.00%
Commitment fee percentage at period end																																											0.225%			0.15%		0.35%
Credit facility amount outstanding																																						0					0								534,000,000				80,000,000
Letters of credit issued and outstanding																																											20,000,000
Credit facility available borrowing capacity																																											3,000,000,000
Aggregate carrying amount assets pledged																																									2,200,000,000
Loss on termination of debt																																							4,000,000	4,000,000
Debt to tangible capitalization ratio																																																0.6
Percentage of total commitment under ADDCL secondary bank credit agreement provided by subsidiary																																																						65.00%
Debt due to a subsidiary, eliminated in consolidation																																																			399,000,000				52,000,000
Restricted investments used as security for debt instruments										$ 519,000,000	3,200,000,000	$ 594,000,000	3,600,000,000																																										$ 20,000,000

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The amount outstanding under Credit Facilities or Notes payable which is due to one of the Company's subsidiaries and is eliminated in consolidation.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount of assets pledged to secure a debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount borrowed under the credit facility as of the balance sheet date.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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