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Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.","units":{"USD":[{"end":"2008-12-31","val":3543000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":5616000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"RegulatedOperatingRevenue":{"label":"Regulated Operating Revenue","description":"The total amount of regulated operating revenues recognized during the period.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":6978000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":9207000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":6341000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"RepaymentsOfBankDebt":{"label":"Repayments of Bank Debt","description":"The cash outflow to settle a bank borrowing during the year.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":0,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":0,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-255000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"RepaymentsOfLongTermDebt":{"label":"Repayments of Long-term Debt","description":"The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":1397000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":919000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":1428000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"RetainedEarningsAppropriated":{"label":"Retained Earnings, Appropriated","description":"A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies.","units":{"USD":[{"end":"2008-12-31","val":1920000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":3134000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"RetainedEarningsUnappropriated":{"label":"Retained Earnings, Unappropriated","description":"A segregation of retained earnings which is available for dividend distribution. Earnings not paid out as dividends but instead reinvested in the core business or used to pay off debt. Unappropriated profit is part of shareholder equity. Also called cumulative distributions or earned surplus or accumulated earnings or unappropriated profit.","units":{"USD":[{"end":"2008-12-31","val":692000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":-841000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"SellingExpense":{"label":"Selling Expense","description":"Expenses recognized in the period that are directly related to the selling and distribution of products or services.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":310000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":412000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":345000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"SellingGeneralAndAdministrativeExpense":{"label":"Selling, General and Administrative Expense","description":"The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":185000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":219000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":208000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"StockholdersEquity":{"label":"Stockholders' Equity Attributable to Parent","description":"Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.","units":{"USD":[{"end":"2008-12-31","val":3316000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":4264000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"SubsidiaryOrEquityMethodInvesteeCumulativeProceedsReceivedOnAllTransactions":{"label":"Subsidiary or Equity Method Investee, Cumulative Proceeds Received on All Transactions","description":"Cumulative amount of cash and other consideration received by subsidiary or equity method investee in exchange for shares or stock issued or sold. Include amounts of cash received, fair value of non-cash assets received, fair value of liabilities assumed, and fair value of any other forms of consideration.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":-76000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":-127000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-809000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"TaxesPayableCurrent":{"label":"Taxes Payable, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2008-12-31","val":82000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":104000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"TreasuryStockShares":{"label":"Treasury Stock, Shares","description":"Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.","units":{"shares":[{"end":"2008-12-31","val":69468768,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":52389112,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"TreasuryStockValue":{"label":"Treasury Stock, Value","description":"The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.","units":{"USD":[{"end":"2008-12-31","val":326000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":649000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"TreasuryStockValueAcquiredCostMethod":{"label":"Treasury Stock, Value, Acquired, Cost Method","description":"Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":-32000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":-147000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-736000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"UnrealizedGainLossOnSecurities":{"label":"Unrealized Gain (Loss) on Securities","description":"Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":-30000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":4000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":23000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}},"UnsecuredDebtCurrent":{"label":"Unsecured Debt, Current","description":"Carrying value as of the balance sheet date of the portion of long-term, uncollateralized debt obligations due within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2008-12-31","val":1296000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":452000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"UnsecuredLongTermDebt":{"label":"Unsecured Long-term Debt, Noncurrent","description":"Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.","units":{"USD":[{"end":"2008-12-31","val":3436000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008Q4I"},{"end":"2009-12-31","val":7319000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009Q4I"}]}},"WeightedAverageNumberOfSharesOutstandingBasic":{"label":"Weighted Average Number of Shares Outstanding, Basic","description":"Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.","units":{"shares":[{"start":"2007-01-01","end":"2007-12-31","val":1539489000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":1534067000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":1492453000000,"accn":"0001292814-10-001853","fy":2009,"fp":"FY","form":"20-F","filed":"2010-06-01","frame":"CY2009"}]}}}}}