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Schedule of Valuation and Qualifying Accounts Disclosure | 12 Months Ended
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Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure | CALPINE CORPORATION AND SUBSIDIARIES SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS
Description | Balance at Beginning of Year |  | Charged to Expense |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Year
| (in millions)
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 4 |  |  | $ | (2 | ) |  | $ | — |  |  | $ | — |  |  | $ | 2 |
Deferred tax asset valuation allowance | 1,836 |  |  | (199 | ) |  | — |  |  | — |  |  | 1,637 |
Year Ended December 31, 2014 |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 5 |  |  | $ | (1 | ) |  | $ | — |  |  | $ | — |  |  | $ | 4 |
Deferred tax asset valuation allowance | 2,246 |  |  | (410 | ) |  | — |  |  | — |  |  | 1,836 |
Year Ended December 31, 2013 |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 6 |  |  | $ | 4 |  |  | $ | (5 | ) |  | $ | — |  |  | $ | 5 |
Deferred tax asset valuation allowance | 2,222 |  |  | 24 |  |  | — |  |  | — |  |  | 2,246 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- References No definition available. + Details
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