Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Prior to the spinoff, PPL Services was an affiliate of Talen Energy. The disclosures below, related to PPL Services, provide information regarding transactions that occurred prior to June 1, 2015. After June 1, 2015, transactions with PPL Services, or any other PPL subsidiaries are not related party transactions. Support Costs Prior to the spinoff, Talen Energy was provided with administrative, management and support services, primarily from PPL Services. Where applicable, the costs of these services were charged to Talen Energy Supply as direct support costs. General costs that could not be directly attributed to a specific affiliate were allocated and charged to the respective affiliates, including Talen Energy Supply, as indirect support costs. PPL Services used a three-factor methodology that includes the affiliates invested capital, operation and maintenance expenses and number of employees to allocate indirect costs, which methodology Talen Energy believes was reasonable. Talen Energy Supply was charged, primarily by PPL Services, $49 million for three months ended March 31, 2015, including amounts applied to accounts that are further distributed between capital and expense. Gas Supply Contract A subsidiary of Jade has gas supply contracts in place with TrailStone NA Logistics LLC (TrailStone), an affiliate of Riverstone, under which TrailStone supplies gas to the generation facilities owned by Jade. For the three months ended March 31, 2016, Talen Energy incurred $10 million of costs for these gas purchases, which are primarily recorded in "Fuel and energy purchases" on the Statement of Income. Other See Note 8 for discussions regarding intercompany allocations prior to the spinoff associated with defined benefits.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.