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Equity Equity Transactions with Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified |  |  |  |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 25, 2014 | Dec. 31, 2013 | Jun. 30, 2014 Masinloc [Member] | Jul. 15, 2014 Subsequent Event [Member] | Jul. 15, 2014 Subsequent Event [Member] MW | Jul. 15, 2014 Subsequent Event [Member] Masinloc [Member] | Jul. 15, 2014 Subsequent Event [Member] International Finance Corporation [Member] | Jul. 15, 2014 Subsequent Event [Member] Electricity Generating Public Company Limited [Member]
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Investment In Affiliate Ownership Percentage Sold |  | 45.00% |  | 45.00% |  |  |  |  |
Divestiture of Business, Purchase Purchase Subject Adjustment |  | $ 453 |  |  |  |  |  |  |
Net proceeds received from sale of businesses |  |  |  |  | 453 |  |  |  |
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount |  |  |  |  |  | 300 |  |  |
Divestiture of Businesses, Portion Contingent Upon Achievement of Certain Restructuring Efficiencies |  |  |  |  |  | 23 |  |  |
Investments in and advances to affiliates | $ 1,000 |  | $ 1,010 |  |  |  |  |  |
Public Utilities, Divestiture of Business, Direct Stake of Coal Fired Power Plant Expansion Project |  |  |  |  |  | 630 |  |  |
Public Utilities, Divestiture of Business, Potential Energy Storage Projects in Advanced Development |  |  |  |  |  | 60 |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  | 51.00% |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  | 8.00% | 41.00%

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- Definition Divestiture of Businesses, Portion Contingent Upon Achievement of Certain Restructuring Efficiencies + References No definition available. + Details
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- Definition Divestiture of Business, Purchase Purchase Adjustment + References No definition available. + Details
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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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