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Other Income (Expense) - net | 3 Months Ended
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Mar. 31, 2016
Other Nonoperating Income (Expense) [Abstract] |
Other Income (Expense) - net | Other Income (Expense) - net Talen Energy's "Other Income (Expense) - net" for the three months ended March 31, 2016 and 2015 was primarily earnings on securities in NDT funds.

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- Definition Disclosure of the detailed components of other nonoperating income and other nonoperating expenses. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), (d) miscellaneous other income items, (e) losses on securities (net of profits) and (f) miscellaneous income deductions. + References No definition available. + Details
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Namespace Prefix: | tln_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration