v3.3.0.814

Assets and Liabilities with Recurring Fair Value Measurements (Textuals) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value Measurement [Domain] |  |  |  |  |  |  |
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract] |  |  |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | $ 624 |  | $ 624 |  | $ 679 |
Restricted Cash and Cash Equivalents |  | 250 |  | 250 |  | 217 |
Balance, beginning of period |  | 243 | $ (9) | 85 | $ 14 |  |
Included in operating revenues | [1] | 70 | 7 | 236 | (1) |  |
Fair Value, Assets Measured with Unobservable Inputs on Recurring Basis, Gain (Loss) Included In Fuel And Purchased Energy Expense | [2] | (2) | 5 | (2) | 9 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 0 | 0 | 3 | 1 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (8) | 9 | (24) | (7) |  |
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount |  | 0 | 0 | 0 | 0 |  |
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount |  | 0 | 0 | 0 | 0 |  |
Transfers into level 3 | [3],[4] | 0 | 0 | 0 | 0 |  |
Transfers out of Level 3 | [4],[5] | (11) | (1) | (6) | (5) |  |
Balance, end of period |  | 292 | 11 | 292 | 11 |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) |  | 68 | 12 | 234 | 8 |  |
Cash and Cash Equivalents, at Carrying Value |  | 659 | $ 1,529 | 659 | $ 1,529 | 717 | $ 941
Restricted Cash and Cash Equivalents |  | $ 275 |  | $ 275 |  | $ 244 |
[1] | For power contracts and other power-related products, included on our Consolidated Condensed Statements of Operations.
[2] | For natural gas contracts, swaps and options, included on our Consolidated Condensed Statements of Operations.
[3] | There were no transfers out of level 2 into level 3 for each of the three and nine months ended September 30, 2015 and 2014.
[4] | We transfer amounts among levels of the fair value hierarchy as of the end of each period. There were no transfers into or out of level 1 for each of the three and nine months ended September 30, 2015 and 2014.
[5] | We had $11 million and $1 million in gains transferred out of level 3 into level 2 for the three months ended September 30, 2015 and 2014, respectively, and $6 million and $5 million in gains transferred out of level 3 into level 2 for the nine months ended September 30, 2015 and 2014, respectively, due to changes in market liquidity in various power markets.

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- Definition Fair Value, Assets Measured with Unobservable Inputs on Recurring Basis, Gain (Loss) Included in Operating Revenue + References No definition available. + Details
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- Definition Fair Value, Assets Measured with Unobservable Inputs on Recurring Basis, Gain (Loss) Included In Fuel And Purchased Energy Expense + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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