Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ (370)	$ 207	$ (215)	$ 378
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	(130)	72	(75)	132
U.S. government tax incentives, including Energy Tax Credits	(79)	(87)	(133)	(116)
Income Tax Reconciliation, Tax Credits, Foreign	(28)	(19)	(39)	(30)
Income Tax Reconciliation, Other Adjustments	31	26	17	3
Income tax (benefit) expense	$ (206)	$ (8)	$ (230)	$ (11)
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income tax computed at US statutory tax rate	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credits, Investment	(21.00%)	(42.00%)	(62.00%)	(31.00%)
Foreign government tax incentives, including BEFIEX	(7.00%)	(9.00%)	(18.00%)	(8.00%)
Effective income tax rate reconciliation, other	7.00%	12.00%	8.00%	1.00%
Effective Income Tax Rate, Continuing Operations	(56.00%)	(4.00%)	(107.00%)	(3.00%)

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by investment tax credits generated or utilized under enacted tax laws during the period.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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-Publisher SEC
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A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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-Publisher FASB
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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to foreign tax credits generated or utilized under enacted tax laws during the period.

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