2.2.0.7 false Other Financial Statement Disclosures 006100 - Disclosure - Other Financial Statement Disclosures true false false false 1 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Notes to Financial Statements [Abstract] 0 rdc_NotesToFinancialStatementsAbstract rdc false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Note 10 - Other Financial Statement Disclosures - Receivables - Trade and Other 1 us-gaap_AccountsReceivableAdditionalNarrativeDisclosure us-gaap true na duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">Receivables - Trade and Other</font> - Due to a contract dispute with its Mexico agent, the Company has been unable to submit billings to or make collections from PEMEX for use of the <font style="DISPLAY: inline; FONT-STYLE: italic">Gorilla IV</font> during 2010 and, as a result, had $30.8 million of accrued or unbilled revenues and related value added taxes included in trade accounts receivable at June 30, 2010.  The Company believes all amounts due or accrued under the PEMEX contract will be collected.</font></div> Receivables - Trade and Other - Due to a contract dispute with its Mexico agent, the Company has been unable to submit billings to or make collections from false false false xbrli:stringItemType string Further narrative disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a, c -Article 5 false 4 Note 10 - Other Financial Statement Disclosures - Fair Value Disclosures 1 us-gaap_FairValueDisclosuresTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">Fair Values of Financial Instruments</font> - The carrying amounts of the Company's cash and cash equivalents, trade receivables and trade payables approximated their fair values due to their short maturities.  As of June 30, 2010, the fair values of the Company's debt, which had an aggregate carrying value of $820.1 million, approximated $890 million.  Fair values of the Company's debt was estimated based on quoted market prices for the same or similar issues or on the current rates offered to the Company for debt of the same remaining maturities.</font></div><div style="DISPLAY: block; TEXT-INDENT: 0pt"><br /></div> Fair Values of Financial Instruments - The carrying amounts of the Company's cash and cash equivalents, trade receivables and trade payables approximated their false false false us-types:textBlockItemType textblock This item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 false 5 Note 10 - Other Financial Statement Disclosures - Cash Flow, Supplemental Information 1 us-gaap_CashFlowSupplementalDisclosuresTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">Supplemental Cash Flow Information</font> - Accrued capital expenditures, which are excluded from capital expenditures in the Condensed Consolidated Statements of Cash Flows until settlement, were $25.0 million and $39.9 million at June 30, 2010 and 2009, respectively.</font></div> Supplemental Cash Flow Information - Accrued capital expenditures, which are excluded from capital expenditures in the Condensed Consolidated Statements of false false false us-types:textBlockItemType textblock Designated to encapsulate the entire footnote disclosure that provides information on the supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 false 6 Note 10 - Other Financial Statement Disclosures - Comprehensive Income 1 us-gaap_ComprehensiveIncomeNoteTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">Other Comprehensive Income</font> - Rowan had no items of other comprehensive income during the three or six months ended June 30, 2010 or 2009.</font></div> Other Comprehensive Income - Rowan had no items of other comprehensive income during the three or six months ended June 30, 2010 or 2009. false false false us-types:textBlockItemType textblock This label may include the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains and losses on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain or loss and net prior service cost or credit for pension plans and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14-26 false 7 Note 10 - Other Financial Statement Disclosures - Material Operating Charges 1 us-gaap_UnusualOrInfrequentItemsDisclosureTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">Material Charge</font> - During the first quarter of 2010, the Drilling Products and Systems manufacturing segment performed an assessment of its Houston-based raw materials and supplies inventory.  As a result, the Company increased its inventory valuation reserve by approximately $42.0 million and recorded a corresponding charge to its operations during the period to reflect a reduction in the estimated realizable value of items that were deemed to be nonconforming or slow-moving.  Such amount is reflected in the Condensed Consolidated Statements of Income on the line, "Material charge - manufacturing inventories."</font></div> Material Charge - During the first quarter of 2010, the Drilling Products and Systems manufacturing segment performed an assessment of its Houston-based raw false false false us-types:textBlockItemType textblock Any additional information related to the determination or classification of material events or transactions that are abnormal or significantly different from typical activities or are not reasonably expect to recur in the foreseeable future; but not both, and therefore does not meet both criteria for classification as an extraordinary item. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. No authoritative reference available. false 1 6 false UnKnown UnKnown UnKnown false true