2.0.0.10 false Note 1 - Basis of Financial Statements Preparation 00900 - Disclosure - Note 1 - Basis of Financial Statements Preparation true false false false 1 usd $ false false Dollars Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 2 Notes to Financial Statements [Abstract] 0 pbra_NotesToFinancialStatementsAbstract pbra false na duration string 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 No definition available. false 3 Note 1 - Basis of Financial Statements Preparation 1 pbra_TheCompanyAndItsOperationsTextBlock pbra false na duration string No definition available. false false false false false false false false false false false false 1 false false false false 0 0 1. Basis of Financial Statements Preparation The accompanying unaudited consolidated financial statements of Petróleo Brasileiro S.A. -Petrobras (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) and the rules and regulations of the Securities and Exchange Commission (SEC) for interim financial statements. Accordingly they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. These unaudited consolidated financial statements and the accompanying notes should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2009 and the notes thereto. The balance sheet at December 31, 2009 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The consolidated financial statements as of March 31, 2010 and for the three-month periods ended March 31, 2010 and 2009, included in this report, are unaudited. However, in management's opinion, such consolidated financial statements reflect all normal recurring adjustments that are necessary for a fair presentation. The results for the interim periods are not necessarily indicative of trends or of results expected for the full year ending December 31, 2010. The preparation of these financial statements requires the use of estimates and assumptions that reflect the assets, liabilities, revenues and expenses reported in the financial statements, as well as amounts included in the notes thereto. Management reviews its estimates periodically, including those related to oil and gas reserves, pension and health care liabilities, depreciation, depletion and amortization, abandonment costs, contingencies and income taxes. While the Company uses its best estimates and judgements, actual results could differ from those estimates as further confirming events occur. Certain prior years amounts have been reclassified to conform to current year presentation standards. These reclassifications are not significant to the consolidated financial statements and had no impact on the Companys net income. Events subsequent to March 31, 2010, were evaluated until the time of the Form 6-K filing with the Securities and Exchange Commission. Pursuant to Rule 436 (c) under the Securities Act of 1933 (the Act), this is not a report and should not be considered a part of any registration statement prepared or certified within the meanings of Sections 7 and 11 of the Act and therefore, the independent accountants liability under Section 11 does not extend to the information included herein. 1. Basis of Financial Statements Preparation The accompanying unaudited consolidated financial statements of Petróleo Brasileiro S.A. -Petrobras (the false false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true