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Other Income (Expense) - net	3 Months Ended
	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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Balance Type:	na
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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