2.2.0.25falsefalse011900 - Disclosure - SUBSEQUENT EVENTtruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0sre_NotesToConsolidatedFinancialStatementsAbstractsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseNotes to Consolidated Financial Statements [Abstract]3false0us-gaap_ScheduleOfSubsequentEventsTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00NOTE 19. SUBSEQUENT EVENT On January 19, 2011, Sempra Pipelines & Storage agreed to acquire from AEI its interests in Chilquinta Energía S.A. (Chilquinta Energía) and Luz del Sur S.A. (Luz del Sur) for approximately $875 million.As of December 31, 2010, Sempra Pipelines & Storage and AEI each own 50 percent of Chilquinta Energía and approximately 38 percent of Luz del Sur. When this transaction is completed, Sempra Pipelines & Storage will own 100 percent of Chilquinta Energía and approximately 76 percent of Luz del Sur, with the remaining shares of Luz del Sur held by institutional investors and the general public. As part of our acquisition of AEI's interest in Luz del Sur, we are required to launch a tender offer to the minority shareholders of Luz del Sur to purchase their shares at a price as determined by an independent appraiser. As part of this transaction, Sempra Pipelines & Storage has also agreed to acquire AEI's interests in two energy-services companies, Tecnored S.A. and Tecsur S.A.We expect the transaction to close in the second quarter of 2011, subject to closing conditions, including obtaining regulatory approvals and resolution of certain tax matters.We provide additional information about Sempra Pipelines & Storage's investments in Chilquinta Energía and Luz del Sur in Note 4.NOTE 19. SUBSEQUENT EVENT On January 19, 2011, Sempra Pipelines & Storage agreed to acquire from AEI its interests in Chilquinta Energía S.A.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes disclosed significant events or transactions that occurred after the balance sheet date, but before the issuance of the financial statements. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 11 falsefalseSubsequent Events12SUBSEQUENT EVENTUnKnownUnKnownUnKnownUnKnownfalsetrue