$RIG
Transocean Ltd. Stock $rig

$rig Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000145150513000040 Filed on March 01, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$2.133B	$1.974B	$2.051B
YoY Change	0.28%	-13.46%	-17.27%
Cost Of Revenue	$2.264B	$1.344B	$1.194B
YoY Change	69.08%	11.81%	-11.36%
Gross Profit	-$209.0M	$630.0M	$643.0M
YoY Change	-126.52%	-41.61%	-43.2%
Gross Profit Margin	-9.8%	31.91%	31.35%
Selling, General & Admin	$88.00M	$67.00M	$66.00M
YoY Change	33.33%	13.56%	13.79%
% of Gross Profit		10.63%	10.26%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$288.0M	$281.0M	$359.0M
YoY Change	-297.26%	-27.58%	-8.65%
% of Gross Profit		44.6%	55.83%
Operating Expenses	$376.0M	$348.0M	$252.0M
YoY Change	-15.88%	-22.15%	-44.12%
Operating Profit	-$5.811B	$303.0M	$380.0M
YoY Change	777.79%	-52.06%	-60.29%
Interest Expense	-$161.0M	$151.0M	-$142.0M
YoY Change	10.27%	-211.85%	4.41%
% of Operating Profit		49.83%	-37.37%
Other Income/Expense, Net	-$20.00M	-$221.0M	-$5.000M
YoY Change	-281.82%	1600.0%	66.67%
Pretax Income	-$5.978B	$77.00M	$236.0M
YoY Change	615.07%	-84.16%	-70.86%
Income Tax	$113.0M	$93.00M	$52.00M
% Of Pretax Income		120.78%	22.03%
Net Earnings	-$6.165B	-$32.00M	$124.0M
YoY Change	671.59%	-108.7%	-82.66%
Net Earnings / Revenue	-289.03%	-1.62%	6.05%
Basic Earnings Per Share	-$18.67	-$0.09	$0.51
Diluted Earnings Per Share	-$18.67	-$0.09	$0.50
COMMON SHARES
Basic Shares Outstanding	329.0M shares	320.0M shares	320.0M shares
Diluted Shares Outstanding	329.0M shares	320.0M shares	320.0M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$4.017B	$3.286B	$3.389B
YoY Change	19.77%	-29.12%	17.35%
Cash & Equivalents	$4.017B	$3.246B	$3.349B
Short-Term Investments
Other Short-Term Assets	$646.0M	$659.0M	$689.0M
YoY Change	36.86%	97.31%	125.9%
Inventory	$529.0M	$578.0M	$546.0M
Prepaid Expenses
Receivables	$2.049B	$2.046B	$2.114B
Other Receivables	$127.0M	$0.00	$0.00
Total Short-Term Assets	$7.536B	$6.569B	$6.738B
YoY Change	21.37%	-15.46%	13.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$20.79B	$20.72B	$21.00B
YoY Change	8.73%	-7.55%	-6.78%
Goodwill	$3.217B
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$3.491B	$1.223B	$1.070B
YoY Change	4.08%	20.49%	8.74%
Total Long-Term Assets	$27.50B	$30.08B	$30.20B
YoY Change	-10.16%	-4.7%	-4.55%
TOTAL ASSETS
Total Short-Term Assets	$7.536B	$6.569B	$6.738B
Total Long-Term Assets	$27.50B	$30.08B	$30.20B
Total Assets	$35.03B	$36.65B	$36.94B
YoY Change	-4.84%	-6.83%	-1.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$880.0M	$755.0M	$742.0M
YoY Change	5.77%	-4.55%	-23.35%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.187B	$1.926B	$1.916B
YoY Change	1.25%	12.17%	15.28%
Total Short-Term Liabilities	$5.528B	$4.270B	$4.484B
YoY Change	38.34%	-10.37%	-3.94%
LONG-TERM LIABILITIES
Long-Term Debt	$11.35B	$9.174B	$9.165B
YoY Change	25.25%	-17.52%	-6.13%
Other Long-Term Liabilities	$1.925B	$1.730B	$1.754B
YoY Change	7.48%	-1.26%	4.22%
Total Long-Term Liabilities	$13.76B	$10.90B	$10.92B
YoY Change	20.32%	-15.31%	-4.61%
TOTAL LIABILITIES
Total Short-Term Liabilities	$5.528B	$4.270B	$4.484B
Total Long-Term Liabilities	$13.76B	$10.90B	$10.92B
Total Liabilities	$19.29B	$15.82B	$16.05B
YoY Change	24.99%	-13.51%	-4.62%
SHAREHOLDERS EQUITY
Retained Earnings	$4.180B
YoY Change	-57.92%
Common Stock	$4.982B
YoY Change	11.16%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$240.0M
YoY Change	0.0%
Treasury Stock Shares	2.863M shares
Shareholders Equity	$15.64B	$20.82B	$20.89B
YoY Change
Total Liabilities & Shareholders Equity	$35.03B	$36.65B	$36.94B
YoY Change	-4.84%	-6.83%	-1.64%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	-$6.165B	-$32.00M	$124.0M
YoY Change	671.59%	-108.7%	-82.66%
Depreciation, Depletion And Amortization	$288.0M	$281.0M	$359.0M
YoY Change	-297.26%	-27.58%	-8.65%
Cash From Operating Activities	$603.0M	$492.0M	$340.0M
YoY Change	-20.24%	-30.61%	-73.21%
INVESTING ACTIVITIES
Capital Expenditures	-$341.0M	$124.0M	-$293.0M
YoY Change	-10.26%	-141.33%	-2.33%
Acquisitions
YoY Change
Other Investing Activities	-$946.0M	-$6.000M	-$22.00M
YoY Change		-400.0%	-103.79%
Cash From Investing Activities	-$1.287B	-$320.0M	-$315.0M
YoY Change	238.68%	7.38%	-212.5%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$1.200B
YoY Change
Debt Paid & Issued, Net		$23.00M
YoY Change
Cash From Financing Activities	1.455B	-$275.0M	-448.0M
YoY Change	-187.76%	-120.57%	81.38%
NET CHANGE
Cash From Operating Activities	603.0M	$492.0M	340.0M
Cash From Investing Activities	-1.287B	-$320.0M	-315.0M
Cash From Financing Activities	1.455B	-$275.0M	-448.0M
Net Change In Cash	771.0M	-$103.0M	-423.0M
YoY Change	-160.14%	-105.89%	-132.49%
FREE CASH FLOW
Cash From Operating Activities	$603.0M	$492.0M	$340.0M
Capital Expenditures	-$341.0M	$124.0M	-$293.0M
Free Cash Flow	$944.0M	$368.0M	$633.0M
YoY Change	-16.9%	-63.53%	-59.66%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-715000000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	Transocean Ltd.
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001451505
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2010Q1	rig	Cash Payment To Acquire Asset Formerly Held Under Capital Lease CashPaymentToAcquireAssetFormerlyHeldUnderCapitalLease	15000000	USD
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	16100000000	USD
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	359542668	shares
CY2010	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	7698000000	USD
CY2010	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	251000000	USD
CY2010	us-gaap	Revenues Revenues	7949000000	USD
CY2011	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	7407000000	USD
CY2011	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	620000000	USD
CY2011	us-gaap	Revenues Revenues	8027000000	USD
CY2012	us-gaap	Revenues Revenues	9196000000	USD
CY2011	us-gaap	Contract Revenue Cost ContractRevenueCost	6179000000	USD
CY2010	us-gaap	Contract Revenue Cost ContractRevenueCost	4219000000	USD
CY2011	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	1109000000	USD
CY2010	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	1009000000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	288000000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	246000000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	7511000000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	7576000000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	5474000000	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	5201000000	USD
CY2011	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-12000000	USD
CY2010	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	255000000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	2730000000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	-4762000000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	1581000000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	23000000	USD
CY2011	us-gaap	Interest Expense InterestExpense	621000000	USD
CY2010	us-gaap	Interest Expense InterestExpense	567000000	USD
CY2011Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	236000000	USD
CY2012Q4	rig	Deferred Revenue Of Consolidated Variable Interest Entities DeferredRevenueOfConsolidatedVariableInterestEntities	72000000	USD
CY2011Q4	rig	Deferred Revenue Of Consolidated Variable Interest Entities DeferredRevenueOfConsolidatedVariableInterestEntities	85000000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	44000000	USD
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CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	880000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-181000000	USD
CY2011Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	86000000	USD
CY2011Q4	rig	Debt Of Consolidated Variable Interest Entities Due Within One Year DebtOfConsolidatedVariableInterestEntitiesDueWithinOneYear	245000000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-676000000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-575000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-5438000000	USD
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CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	292000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-9000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-13000000	USD
CY2011Q4	rig	Debt Due Within One Year Excluding Variable Interest Entities DebtDueWithinOneYearExcludingVariableInterestEntities	1942000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-5762000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	9000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1863000000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	85000000	USD
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CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-168000000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-894000000	USD
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CY2011	us-gaap	Profit Loss ProfitLoss	-5677000000	USD
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CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	77000000	USD
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CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-18.14
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.66
CY2011Q4	us-gaap	Supplies Supplies	529000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	142000000	USD
CY2011Q4	us-gaap	Assets Held For Sale Current AssetsHeldForSaleCurrent	26000000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	646000000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5528000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5463000000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	7536000000	USD
CY2011Q4	rig	Long Term Debt Excluding Variable Interest Entities LongTermDebtExcludingVariableInterestEntities	10756000000	USD
CY2011Q4	rig	Long Term Debt Of Consolidated Variable Interest Entities LongTermDebtOfConsolidatedVariableInterestEntities	593000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	487000000	USD
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CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2000000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-99000000	USD
CY2011	us-gaap	Loss On Derivative Instruments Pretax LossOnDerivativeInstrumentsPretax	-11000000	USD
CY2010	us-gaap	Loss On Derivative Instruments Pretax LossOnDerivativeInstrumentsPretax	-12000000	USD
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CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	320000000	shares
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CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	20788000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	20880000000	USD
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CY2011Q4	us-gaap	Assets Assets	35032000000	USD
CY2012Q4	us-gaap	Assets Assets	34255000000	USD
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CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	20559000000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	-5754000000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	95000000	USD
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CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2863267	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2863267	shares
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	21340000000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1159000000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-6000000	USD
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1000000	USD
CY2011	rig	Adjustment To Additional Paid In Capital Dividends AdjustmentToAdditionalPaidInCapitalDividends	1041000000	USD
CY2010	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	240000000	USD
CY2010	us-gaap	Stockholders Equity Other StockholdersEquityOther	16000000	USD
CY2011	rig	Amortization Of Drilling Contract Intangibles AmortizationOfDrillingContractIntangibles	-45000000	USD
CY2010	rig	Amortization Of Drilling Contract Intangibles AmortizationOfDrillingContractIntangibles	-98000000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1109000000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1009000000	USD
CY2011	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	342000000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	95000000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	102000000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-12000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	255000000	USD
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	183000000	USD
CY2011	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	125000000	USD
CY2010	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	189000000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-62000000	USD
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1000000	USD
CY2011	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-16000000	USD
CY2010	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	205000000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	2224000000	USD
CY2010Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9934000000	USD
CY2011	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-803000000	USD
CY2010	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-379000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1825000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3906000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	734000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2708000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-389000000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	974000000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-5839000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1820000000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1349000000	USD
CY2011	rig	Payments For Capital Expenditures For Discontinued Operations PaymentsForCapitalExpendituresForDiscontinuedOperations	46000000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1246000000	USD
CY2011	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	78000000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	14000000	USD
CY2010	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	60000000	USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	447000000	USD
CY2010	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	560000000	USD
CY2010	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	37000000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	13000000	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-13000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1896000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-721000000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-88000000	USD
CY2010	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-193000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2939000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2054000000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2409000000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2565000000	USD
CY2011	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	479000000	USD
CY2011	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	523000000	USD
CY2011	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	763000000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-29000000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-961000000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	663000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1202000000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1117000000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3354000000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1130000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5134000000	USD
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold" size="2">Note 1—Nature of Business</font></b></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2"> </font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2">Transocean Ltd. (together with its subsidiaries and predecessors, unless the context requires otherwise, “Transocean,” the “Company,” “we,” “us” or “our”) is a leading international provider of offshore contract drilling services for oil and gas wells.  We specialize in technically demanding sectors of the offshore drilling business with a particular focus on deepwater and harsh environment drilling services.  Our mobile offshore drilling fleet is considered one of the most versatile fleets in the world.  We contract our drilling rigs, related equipment and work crews predominantly on a dayrate basis to drill oil and gas wells.  At December 31, 2012, we owned or had partial ownership interests in and operated 82 mobile offshore drilling units associated with our continuing operations.  As of this date, our fleet consisted of 48 High-Specification Floaters (Ultra-Deepwater, Deepwater and Harsh Environment semisubmersibles and drillships), 25 Midwater Floaters, and nine High-Specification Jackups.  We also had six Ultra-Deepwater drillships and three High-Specification Jackups under construction or under contract to be constructed.  See Note 12—Drilling Fleet.</font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2"> </font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2">We also provide oil and gas drilling management services, drilling engineering and drilling project management services through Applied Drilling Technology Inc., our wholly owned subsidiary, and through ADT International, a division of one of our United Kingdom (“U.K.”) subsidiaries (together, “ADTI”).  ADTI conducts drilling management services primarily either on a dayrate or on a completed-project, fixed-price or turnkey basis.</font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2"> </font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2">In November 2012, in connection with our plan to discontinue operations associated with the Standard Jackup and swamp barge asset groups, we completed the sale of 37 Standard Jackups and one swamp barge to Shelf Drilling Holdings, Ltd. (“Shelf Drilling”).  For a transition period following the completion of the sale transactions, we agreed to continue to operate a substantial portion of the Standard Jackups on behalf of Shelf Drilling and to provide certain other transition services to Shelf Drilling.  Under operating agreements, we agreed to continue to operate these Standard Jackups on behalf of Shelf Drilling for periods ranging from nine months to 27 months, until expiration or novation of the underlying drilling contracts by Shelf Drilling.  Under a transition services agreement, we agreed to provide certain transition services for a period of up to 18 months following the completion of the sale transactions.  As of December 31, 2012, we operated 25 Standard Jackups under operating agreements with Shelf Drilling.  See Note 9—Discontinued Operations.</font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2"> </font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2">In March 2012, we announced our intent to discontinue drilling management operations in the shallow waters of the U.S. Gulf of Mexico, upon completion of our then existing contracts.  In December 2012, we completed the final project of our drilling management services operations in the U.S. Gulf of Mexico and discontinued offering our drilling management services in this region.  See Note 9—Discontinued Operations.</font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2"> </font></p> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" size="2">In March 2011, we engaged an unaffiliated advisor to coordinate the sale of the assets of our oil and gas properties operating segment, which comprised the exploration, development and production activities performed by Challenger Minerals Inc., Challenger Minerals (North Sea) Limited and Challenger Minerals (Ghana) Limited (collectively, “CMI”).  In October 2011, we completed the sale of Challenger Minerals (North Sea) Limited, in April 2012, we completed the sale of the assets of Challenger Minerals Inc. and in December 2012, we completed the sale of the assets of Challenger Minerals (Ghana) Limited.  See Note 9—Discontinued Operations.</font></p></div>
CY2010Q4	rig	Property And Equipment Of Consolidated Variable Interest Entities PropertyAndEquipmentOfConsolidatedVariableInterestEntities	2214000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-332000000	USD
CY2010Q4	us-gaap	Minority Interest MinorityInterest	-8000000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36814000000	USD
CY2010	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	10000000	USD
CY2010Q4	us-gaap	Supplies Supplies	425000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	115000000	USD
CY2010Q4	us-gaap	Other Assets Current OtherAssetsCurrent	472000000	USD
CY2010Q4	us-gaap	Assets Current AssetsCurrent	6209000000	USD
CY2010Q4	rig	Property And Equipment Excluding Variable Interest Entities PropertyAndEquipmentExcludingVariableInterestEntities	22149000000	USD
CY2010Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5244000000	USD
CY2010Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19119000000	USD
CY2010Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3354000000	USD
CY2010Q4	us-gaap	Assets Assets	36814000000	USD
CY2010Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	832000000	USD
CY2010Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	109000000	USD
CY2010Q4	rig	Debt Due Within One Year Excluding Variable Interest Entities DebtDueWithinOneYearExcludingVariableInterestEntities	1917000000	USD
CY2010Q4	rig	Debt Of Consolidated Variable Interest Entities Due Within One Year DebtOfConsolidatedVariableInterestEntitiesDueWithinOneYear	243000000	USD
CY2010Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	895000000	USD
CY2010Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3996000000	USD
CY2010Q4	rig	Long Term Debt Excluding Variable Interest Entities LongTermDebtExcludingVariableInterestEntities	8354000000	USD
CY2010Q4	rig	Long Term Debt Of Consolidated Variable Interest Entities LongTermDebtOfConsolidatedVariableInterestEntities	707000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	585000000	USD
CY2010Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1791000000	USD
CY2010Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	11437000000	USD
CY2010Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	41000000	USD
CY2010Q4	us-gaap	Common Stock Value CommonStockValue	4482000000	USD
CY2010Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	7504000000	USD
CY2010Q4	us-gaap	Treasury Stock Value TreasuryStockValue	240000000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	21348000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	104000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	183000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	72000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	42000000	USD
CY2010	rig	Midwater Floaters Sold MidwaterFloatersSold	2	drillingunit
CY2011Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	29000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	808000000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	808000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.27
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	808000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.27
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	29000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	45000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-5839000000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-5839000000	USD
CY2011	rig	Goodwill Impairment Loss Per Diluted Share GoodwillImpairmentLossPerDilutedShare	16.15
CY2012	us-gaap	Goodwill Impaired Adjustment To Initial Estimate Amount GoodwillImpairedAdjustmentToInitialEstimateAmount	118000000	USD
CY2012Q1	rig	Goodwill Impaired Adjustment To Initial Estimate Per Diluted Share GoodwillImpairedAdjustmentToInitialEstimatePerDilutedShare	0.33
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold" size="2">Accounting estimates</font></b><font style="FONT-SIZE: 10pt" size="2">—To prepare financial statements in accordance with accounting principles generally accepted in the U.S., we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosures of contingent assets and liabilities.  On an ongoing basis, we evaluate our estimates and assumptions, including those related to our discontinued operations, allowance for doubtful accounts, materials and supplies obsolescence, property and equipment, investments, notes receivable, goodwill and other intangible assets, income taxes, contingencies, share-based compensation, defined benefit pension plans and other postretirement benefits.  We base our estimates and assumptions on historical experience and on various other factors we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources.  Actual results could differ from such estimates.</font></div>
CY2011Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	65000000	USD
CY2011Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2492000000	USD
CY2011Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	1007000000	USD
CY2011Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	1485000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	1231000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	311000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	920000000	USD
CY2012	rig	Number Of Notes Receivable From Sale Of Midwater Floaters NumberOfNotesReceivableFromSaleOfMidwaterFloaters	2	note
CY2012Q4	rig	Stated Interest Rate On Notes Receivable Received From Sale Of Midwater Floaters StatedInterestRateOnNotesReceivableReceivedFromSaleOfMidwaterFloaters	0.09	pure
CY2012Q4	rig	Stated Interest Rate On Working Capital Loan Receivable StatedInterestRateOnWorkingCapitalLoanReceivable	0.10	pure
CY2011Q4	rig	Notes Receivable From Rig Sale NotesReceivableFromRigSale	110000000	USD
CY2012Q4	rig	Notes Receivable From Rig Sale NotesReceivableFromRigSale	105000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	79000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	45000000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1810000000	USD
CY2010	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	10000000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1810000000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	409000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	59000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	331000000	USD
CY2011Q4	rig	Deferred Tax Assets Drilling Contract Intangibles DeferredTaxAssetsDrillingContractIntangibles	2000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	688000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	37000000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.0783	pure
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	68000000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-426000000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	168000000	USD
CY2012	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	141000000	USD
CY2011	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	221000000	USD
CY2010	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	72000000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	9000000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	11000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	78000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-179000000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	38000000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-6000000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3000000	USD
CY2011	rig	Income Tax Reconciliation Acquisition Of Assets IncomeTaxReconciliationAcquisitionOfAssets	8000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	28000000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	19000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	40000000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	73000000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	4000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	23000000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2000000	USD
CY2012Q4	rig	Deferred Tax Assets Drilling Contract Intangibles DeferredTaxAssetsDrillingContractIntangibles	1000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	380000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	41000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	95000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	86000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	210000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	108000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	501000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	443000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	725000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	788000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	42000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	746000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	210000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	183000000	USD
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CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	24000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	120000000	USD
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CY2010	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	23000000	USD
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CY2009Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	460000000	USD
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CY2011	rig	Disposal Group Including Discontinued Operation Impairment Loss DisposalGroupIncludingDiscontinuedOperationImpairmentLoss	38000000	USD
CY2010	rig	Disposal Group Including Discontinued Operation Impairment Loss DisposalGroupIncludingDiscontinuedOperationImpairmentLoss	1012000000	USD
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CY2012	rig	Redeemable Noncontrolling Interest Net Income Attributable To Noncontrolling Interest RedeemableNoncontrollingInterestNetIncomeAttributableToNoncontrollingInterest	13000000	USD
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CY2010	rig	Redeemable Noncontrolling Interest Net Income Attributable To Noncontrolling Interest RedeemableNoncontrollingInterestNetIncomeAttributableToNoncontrollingInterest	29000000	USD
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CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	493000000	USD
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CY2011Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	5200000000	USD
CY2011Q4	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	1000000000	USD
CY2011Q1	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	178000000	USD
CY2011Q3	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	-1000000	USD
CY2011Q4	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	8000000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8000000	USD
CY2012	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	144000000	USD
CY2012	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Plan Assets DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	15000000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	36000000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	10900000	shares
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-667000000	USD
CY2012	rig	Other Nonoperating Income Expense And Gain Loss On Retirement Of Debt OtherNonoperatingIncomeExpenseAndGainLossOnRetirementOfDebt	-48000000	USD
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	95000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y9M18D
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	4000000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	3000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	866000000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50000000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	12000000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	13536000000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	12459000000	USD
CY2012Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	12437000000	USD
CY2012	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	159000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-639000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	816000000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	-211000000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	22000000	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	140000000	USD
CY2012	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	36000000	USD
CY2011Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2049000000	USD
CY2011Q4	us-gaap	Other Receivables OtherReceivables	127000000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	339000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	339000000	USD
CY2010	rig	Other Nonoperating Income Expense And Gain Loss On Retirement Of Debt OtherNonoperatingIncomeExpenseAndGainLossOnRetirementOfDebt	-31000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	69000000	USD
CY2011Q2	rig	Amount Of Installment AmountOfInstallment	0.79
CY2011Q4	rig	Number Of Quarterly Installments Paid NumberOfQuarterlyInstallmentsPaid	3	installment
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	196000000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1741000000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1367000000	USD
CY2012Q4	rig	Other Liabilities Current Less Debt Due Within One Year OtherLiabilitiesCurrentLessDebtDueWithinOneYear	4096000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	11092000000	USD
CY2012Q4	rig	Other Liabilities Noncurrent Less Debt OtherLiabilitiesNoncurrentLessDebt	1970000000	USD
CY2011Q4	rig	Other Assets Current Less Cash OtherAssetsCurrentLessCash	3519000000	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2187000000	USD
CY2011Q4	rig	Other Liabilities Current Less Debt Due Within One Year OtherLiabilitiesCurrentLessDebtDueWithinOneYear	3341000000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	11349000000	USD
CY2011Q4	rig	Other Liabilities Noncurrent Less Debt OtherLiabilitiesNoncurrentLessDebt	2412000000	USD
CY2011	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	5200000000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	2987000000	USD
CY2012Q2	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	72000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	69000000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	191000000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	789000000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-260000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1493000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2282000000	USD
CY2012	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	278000000	USD
CY2012	rig	Other Financing Activities OtherFinancingActivities	-19000000	USD
CY2011	rig	Other Financing Activities OtherFinancingActivities	-112000000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	240000000	USD
CY2010	rig	Other Financing Activities OtherFinancingActivities	-17000000	USD
CY2011Q2	rig	Cash Distribution Per Share Approved As Additional Paid In Capital CashDistributionPerShareApprovedAsAdditionalPaidInCapital	3.16
CY2011Q2	rig	Number Of Quarterly Installments NumberOfQuarterlyInstallments	4	installment
CY2011Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	11000000	USD
CY2010Q4	us-gaap	Other Receivables OtherReceivables	190000000	USD
CY2012Q4	rig	Nok Exchange Rate NOKExchangeRate	5.56	NOK
CY2012Q1	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	278000000	USD
CY2011Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	629000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	550000000	USD
CY2011Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	29900000	shares
CY2011	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	31000000	USD
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	30000000	USD
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	612000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	555000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	3000000	USD
CY2011Q4	rig	Stock Issued During Period Value Per Share New Issues StockIssuedDuringPeriodValuePerShareNewIssues	40.50
CY2011Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	1760000000	USD
CY2011Q4	rig	Stock Issued During Period Value Per Share New Issues StockIssuedDuringPeriodValuePerShareNewIssues	37.19
CY2011Q4	rig	Share Repurchase Usd Exchange Rate ShareRepurchaseUsdExchangeRate	1.00	USD
CY2012Q4	rig	Common Stock Held By Subsidiary Shares CommonStockHeldBySubsidiaryShares	11500000	shares
CY2011Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1120000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	1424000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1023000000	USD
CY2011Q4	rig	Common Stock Held By Subsidiary Shares CommonStockHeldBySubsidiaryShares	12500000	shares
CY2012Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	1992000000	USD
CY2012	rig	Defined Benefit Plan Contributions By Employer Using Cash Flows From Operations DefinedBenefitPlanContributionsByEmployerUsingCashFlowsFromOperations	159000000	USD
CY2010	rig	Defined Benefit Plan Contributions By Employer Using Cash Flows From Operations DefinedBenefitPlanContributionsByEmployerUsingCashFlowsFromOperations	118000000	USD
CY2011Q4	rig	Share Repurchase Chf Average Exchange Rate ShareRepurchaseChfAverageExchangeRate	0.9183	CHF
CY2011Q4	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1200000000	USD
CY2009Q2	rig	Authorized Aggregate Purchase Price Of Shares For Cancellation AuthorizedAggregatePurchasePriceOfSharesForCancellation	3500000000	CHF
CY2012	rig	Authorized Aggregate Purchase Price Of Shares For Cancellation AuthorizedAggregatePurchasePriceOfSharesForCancellation	3800000000	USD
CY2012Q4	rig	Share Repurchase Chf Exchange Rate ShareRepurchaseChfExchangeRate	0.92	CHF
CY2010	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2900000	shares
CY2010	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	257000000	CHF
CY2008Q4	rig	Stock Issued To Subsidiary During Period Shares StockIssuedToSubsidiaryDuringPeriodShares	16000000	shares
CY2008Q4	rig	Number Of Subsidiaries To Whom Shares Were Issued NumberOfSubsidiariesToWhomSharesWereIssued	1	subsidiary
CY2011	rig	Defined Benefit Plan Contributions By Employer Using Cash Flows From Operations DefinedBenefitPlanContributionsByEmployerUsingCashFlowsFromOperations	103000000	USD
CY2011	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Plan Assets DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	2000000	USD
CY2011	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	103000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1352000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	1648000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1246000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	1700000000	USD
CY2011	rig	Defined Benefit Plan Settlement And Curtailments Plan Assets DefinedBenefitPlanSettlementAndCurtailmentsPlanAssets	3000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	1120000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-640000000	USD
CY2012	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	85000000	USD
CY2012	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	19000000	USD
CY2012	us-gaap	Defined Benefit Plan Benefits Paid DefinedBenefitPlanBenefitsPaid	71000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	1500000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-564000000	USD
CY2011	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-149000000	USD
CY2011	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	65000000	USD
CY2011	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	83000000	USD
CY2011	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-1000000	USD
CY2011	us-gaap	Defined Benefit Plan Benefits Paid DefinedBenefitPlanBenefitsPaid	54000000	USD
CY2011	us-gaap	Defined Benefit Plan Contributions By Plan Participants DefinedBenefitPlanContributionsByPlanParticipants	3000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	1760000000	USD
CY2010Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	1498000000	USD
CY2011	us-gaap	Defined Benefit Plan Business Combinations And Acquisitions Benefit Obligation DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation	17000000	USD
CY2010Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	1029000000	USD
CY2011	us-gaap	Defined Benefit Plan Business Combinations And Acquisitions Plan Assets DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets	9000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	2009000000	USD
CY2012	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-117000000	USD
CY2012	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	81000000	USD
CY2011Q4	us-gaap	Investments In And Advances To Affiliates At Fair Value InvestmentsInAndAdvancesToAffiliatesAtFairValue	1000000	USD
CY2011Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	182000000	USD
CY2011Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	752000000	USD
CY2012	rig	Contract Drilling Intangible Revenues ContractDrillingIntangibleRevenues	42000000	USD
CY2011	rig	Contract Drilling Intangible Revenues ContractDrillingIntangibleRevenues	45000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-12000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax	2000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-565000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-10000000	USD
CY2012Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	66000000	USD
CY2011Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	73000000	USD
CY2012	us-gaap	Defined Benefit Plan Amortization Of Net Gains Losses DefinedBenefitPlanAmortizationOfNetGainsLosses	-53000000	USD
CY2010	rig	Contract Drilling Intangible Revenues ContractDrillingIntangibleRevenues	98000000	USD
CY2012Q4	us-gaap	Assets Held For Sale Current AssetsHeldForSaleCurrent	179000000	USD
CY2012Q4	rig	Property And Equipment As Percentage Of Total Assets PropertyAndEquipmentAsPercentageOfTotalAssets	0.61	pure
CY2012	rig	Impairment Of Long Lived Assets Number Of Asset Groups For Which Impairment Is Indicated Minimum ImpairmentOfLongLivedAssetsNumberOfAssetGroupsForWhichImpairmentIsIndicatedMinimum	1	item
CY2012	us-gaap	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	-2000000	USD
CY2012	us-gaap	Defined Benefit Plan Amounts That Will Be Amortized From Accumulated Other Comprehensive Income Loss In Next Fiscal Year DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear	51000000	USD
CY2012	rig	Number Of Trading Days Used To Calculate Average Stock Price NumberOfTradingDaysUsedToCalculateAverageStockPrice	P30D
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	97000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	12000000	USD
CY2012	rig	Number Of Reporting Units NumberOfReportingUnits	2	item
CY2012	rig	Defined Benefit Plan Determination Of Net Periodic Benefit Cost Investment Gain Loss Recognition Period DefinedBenefitPlanDeterminationOfNetPeriodicBenefitCostInvestmentGainLossRecognitionPeriod	P5Y
CY2012	rig	Threshold For Amortization Of Investment Gains And Losses In Defined Benefit Plans ThresholdForAmortizationOfInvestmentGainsAndLossesInDefinedBenefitPlans	0.10	pure
CY2012	rig	Defined Benefit Plan Obligations Number Of Fair Valuation Assumptions DefinedBenefitPlanObligationsNumberOfFairValuationAssumptions	2	item
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	62000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	65000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	70000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	74000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	453000000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	82000000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	69000000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	85000000	USD
CY2012	rig	Defined Contribution Benefit Plans Number Of Defined Contribution Plans Sponsored By Company DefinedContributionBenefitPlansNumberOfDefinedContributionPlansSponsoredByCompany	3	plan
CY2012	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	20000000	USD
CY2012Q4	us-gaap	Investments In And Advances To Affiliates At Fair Value InvestmentsInAndAdvancesToAffiliatesAtFairValue	1000000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	16000000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	13000000	USD
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	54000000	USD
CY2011	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	39000000	USD
CY2010	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	89000000	USD
CY2012	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-27000000	USD
CY2011	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-99000000	USD
CY2010	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1000000	USD
CY2012	rig	Maximum Expected Expiration Period Of Restriction To Classify Restricted Cash Investment As Current Assets MaximumExpectedExpirationPeriodOfRestrictionToClassifyRestrictedCashInvestmentAsCurrentAssets	P1Y
CY2012	rig	Minimum Expected Expiration Period Of Restriction To Classify Restricted Cash Investment As Other Assets MinimumExpectedExpirationPeriodOfRestrictionToClassifyRestrictedCashInvestmentAsOtherAssets	P1Y
CY2012Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	195000000	USD
CY2012Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	662000000	USD
CY2012	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	149000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1211000000	USD
CY2011	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	83000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	544000000	USD
CY2011	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	88000000	USD
CY2010	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	91000000	USD
CY2010	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	15000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	13000000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	926000000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	-6165000000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	-219000000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	456000000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	10000000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	-304000000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	-381000000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	319000000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	124000000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	-32000000	USD
CY2010	rig	Redeemable Noncontrolling Interest Reclassification To Temporary Equity RedeemableNoncontrollingInterestReclassificationToTemporaryEquity	26000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1483000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	967000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	7032000000	USD
CY2012	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold" size="2">Reclassifications</font></b><font style="FONT-SIZE: 10pt" size="2">—We have made certain reclassifications, which did not have an effect on net income, to prior period amounts to conform with the current year’s presentation, including certain reclassifications to our consolidated statements of financial position, results of operations and cash flows to present our Standard Jackup and swamp barge disposal groups and our U.S. Gulf of Mexico drilling management services operations as discontinued operations (see Note 9—Discontinued Operations).  Other reclassifications did not have a material effect on our consolidated statement of financial position, results of operations or cash flows.</font></div>
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1081000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	274000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1600000000	USD
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CY2012	us-gaap	Defined Benefit Plan Special Termination Benefits DefinedBenefitPlanSpecialTerminationBenefits	-1000000	USD
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CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	82000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	657000000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	20000000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	637000000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	183000000	USD
CY2012	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	68000000	USD
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CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	98000000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	97000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	66000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	72000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	72000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	72000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	73000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	846000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	1201000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	38000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	24000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	21000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	11000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	95000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	231000000	USD
CY2012Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	745000000	USD
CY2012Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	64000000	USD
CY2012Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	681000000	USD
CY2011Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	742000000	USD
CY2011Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	44000000	USD
CY2011Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	698000000	USD
CY2011	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	20000000	USD
CY2010	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	23000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-5845000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	951000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-219000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	2000000	USD
CY2012	rig	Amortization Of Drilling Contract Intangibles AmortizationOfDrillingContractIntangibles	-42000000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1123000000	USD
CY2012	rig	Disposal Group Including Discontinued Operation Depreciation And Amortization Expense DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortizationExpense	183000000	USD
CY2011	rig	Disposal Group Including Discontinued Operation Depreciation And Amortization Expense DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortizationExpense	342000000	USD
CY2012	us-gaap	Contract Revenue Cost ContractRevenueCost	6106000000	USD
CY2010	rig	Disposal Group Including Discontinued Operation Depreciation And Amortization Expense DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortizationExpense	580000000	USD
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-72000000	USD
CY2012	us-gaap	Increase Decrease In Deferred Charges IncreaseDecreaseInDeferredCharges	-85000000	USD
CY2012	rig	Payments For Capital Expenditures For Discontinued Operations PaymentsForCapitalExpendituresForDiscontinuedOperations	106000000	USD
CY2012	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	311000000	USD
CY2012	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	167000000	USD
CY2012	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	24000000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	5000000	USD
CY2010	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-33000000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	386000000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	396000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-345000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-224000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	57000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	55000000	USD
CY2010Q4	rig	Foreign Operating Loss Carryforwards Acquired On Business Acquisition ForeignOperatingLossCarryforwardsAcquiredOnBusinessAcquisition	141000000	USD
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CY2012	rig	Number Of Harsh Environment Ultra Deepwater Semisubmersibles Acquired NumberOfHarshEnvironmentUltraDeepwaterSemisubmersiblesAcquired	2	drillingunit
CY2010	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	560000000	USD
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CY2010	rig	Gain Loss On Loss Of Drilling Unit Per Diluted Share GainLossOnLossOfDrillingUnitPerDilutedShare	0.83
CY2011	rig	Acquisition Of Construction Work In Progress AcquisitionOfConstructionWorkInProgress	272000000	USD
CY2012Q4	rig	Income Tax Examination Penalty From Examination IncomeTaxExaminationPenaltyFromExamination	73000000	USD
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CY2012	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	8773000000	USD
CY2012	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	423000000	USD
CY2012	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	1123000000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	282000000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	56000000	USD
CY2012	us-gaap	Interest Expense InterestExpense	723000000	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	2000000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-50000000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-2.89
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-2.89
CY2012	us-gaap	Loss On Derivative Instruments Pretax LossOnDerivativeInstrumentsPretax	1000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-227000000	USD
CY2012Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	1940000000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	260000000	USD
CY2012Q4	us-gaap	Supplies Supplies	610000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	142000000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	382000000	USD
CY2012Q4	rig	Property And Equipment Excluding Variable Interest Entities PropertyAndEquipmentExcludingVariableInterestEntities	26967000000	USD
CY2012Q4	rig	Property And Equipment Of Consolidated Variable Interest Entities PropertyAndEquipmentOfConsolidatedVariableInterestEntities	1092000000	USD
CY2010	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	2000000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	102000000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	97000000	USD
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3000000	USD
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CY2012	us-gaap	Stockholders Equity Other StockholdersEquityOther	3000000	USD
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CY2012Q4	rig	Long Term Debt Excluding Variable Interest Entities LongTermDebtExcludingVariableInterestEntities	10929000000	USD
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CY2012Q4	us-gaap	Common Stock Value CommonStockValue	5130000000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	7521000000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	240000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3855000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-521000000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	-15000000	USD
CY2012	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-54000000	USD
CY2010	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	580000000	USD
CY2011Q4	us-gaap	Disposal Group Including Discontinued Operation Inventory DisposalGroupIncludingDiscontinuedOperationInventory	98000000	USD
CY2011Q4	rig	Disposal Group Including Discontinued Operation Deferred Costs DisposalGroupIncludingDiscontinuedOperationDeferredCosts	42000000	USD
CY2012Q4	rig	Disposal Group Including Discontinued Operation Rigs And Related Equipment Net Held For Sale DisposalGroupIncludingDiscontinuedOperationRigsAndRelatedEquipmentNetHeldForSale	104000000	USD
CY2012Q4	rig	Disposal Group Including Discontinued Operation Materials And Supplies Held For Sale DisposalGroupIncludingDiscontinuedOperationMaterialsAndSuppliesHeldForSale	71000000	USD
CY2011Q4	rig	Disposal Group Including Discontinued Operation Deferred Tax Current Liabilities DisposalGroupIncludingDiscontinuedOperationDeferredTaxCurrentLiabilities	6000000	USD
CY2011Q2	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	-2000000	USD
CY2012Q1	us-gaap	Goodwill Impaired Adjustment To Initial Estimate Amount GoodwillImpairedAdjustmentToInitialEstimateAmount	118000000	USD
CY2012Q4	rig	Number Of Ultra Deepwater Drillships Under Construction NumberOfUltraDeepwaterDrillshipsUnderConstruction	4	drillingunit
CY2012	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	-22000000	USD
CY2011	rig	Disposal Group Including Discontinued Operation Other Income Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeNet	18000000	USD
CY2010	rig	Disposal Group Including Discontinued Operation Other Income Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeNet	8000000	USD
CY2012Q1	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	-1000000	USD
CY2012Q3	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	-1000000	USD
CY2012Q4	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	12000000	USD
CY2012Q4	rig	Other Assets Current Less Cash OtherAssetsCurrentLessCash	3513000000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-40000000	USD
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CY2010	rig	Payments For Capital Expenditures For Discontinued Operations PaymentsForCapitalExpendituresForDiscontinuedOperations	42000000	USD
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CY2011Q4	rig	Restricted Cash And Investments1 RestrictedCashAndInvestments1	934000000	USD
CY2012	rig	Goodwill Impaired Adjustment To Initial Estimate Per Diluted Share GoodwillImpairedAdjustmentToInitialEstimatePerDilutedShare	0.33
CY2012	rig	Noncash Or Part Noncash Divestiture Amount Of Consideration Received Estimated Fair Value NoncashOrPartNoncashDivestitureAmountOfConsiderationReceivedEstimatedFairValue	194000000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	3217000000	USD
CY2012Q2	rig	Adjustment To Liability And Expense Issuance Of Shares Non Controlling Interest AdjustmentToLiabilityAndExpenseIssuanceOfSharesNonControllingInterest	25000000	USD
CY2012	rig	Intangible Assets Excluding Goodwill Reclassification Adjustment Associated With Discontinued Operations Gross IntangibleAssetsExcludingGoodwillReclassificationAdjustmentAssociatedWithDiscontinuedOperationsGross	270000000	USD
CY2012	rig	Impairment Of Intangible Assets Reclassification Adjustment Associated With Discontinued Operations ImpairmentOfIntangibleAssetsReclassificationAdjustmentAssociatedWithDiscontinuedOperations	239000000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	118000000	USD
CY2012Q4	rig	Assets Of Disposal Group Included In Assets Held For Sale AssetsOfDisposalGroupIncludedInAssetsHeldForSale	179000000	USD
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CY2011Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	119000000	USD
CY2011Q4	us-gaap	Disposal Group Including Discontinued Operation Other Current Assets DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets	21000000	USD
CY2012Q4	rig	Disposal Group Including Discontinued Operation Deferred Revenue Current DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent	32000000	USD
CY2011Q4	rig	Disposal Group Including Discontinued Operation Deferred Revenue Current DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent	17000000	USD
CY2012Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	3000000	USD
CY2011Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	14000000	USD
CY2011Q4	rig	Disposal Group Including Discontinued Operation Deferred Revenue Non Current DisposalGroupIncludingDiscontinuedOperationDeferredRevenueNonCurrent	8000000	USD
CY2011Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	40000000	USD
CY2011Q4	us-gaap	Disposal Group Including Discontinued Operation Other Assets DisposalGroupIncludingDiscontinuedOperationOtherAssets	1857000000	USD
CY2012	rig	Variable Interest Entities Assets Pledgedas Collateral VariableInterestEntitiesAssetsPledgedasCollateral	805000000	USD
CY2011	rig	Variable Interest Entities Assets Pledgedas Collateral VariableInterestEntitiesAssetsPledgedasCollateral	2200000000	USD
CY2012	rig	Goodwill Impairment Loss Per Diluted Share GoodwillImpairmentLossPerDilutedShare	0.33
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	5000000	USD
CY2012	us-gaap	Income Tax Reconciliation Disposition Of Assets IncomeTaxReconciliationDispositionOfAssets	-1000000	USD
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	324000000	USD
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	50000000	USD
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	292000000	USD

Files In Submission

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$RIG
Transocean Ltd. Stock $rig

2011 Q4 Form 10-K Financial Statement

#000145150513000040 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RIG Transocean Ltd. Stock $rig

2011 Q4 Form 10-K Financial Statement

#000145150513000040 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RIG
Transocean Ltd. Stock $rig