Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2015

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

The changes in the carrying amounts of Talen Energy's AROs were as follows.

Balance at December 31, 2014	$	425
Accretion expense	17
Changes in estimate of cash flow or settlement date	33
Obligations assumed in RJS Power acquisition	11
Obligations settled	(2		)
Balance at June 30, 2015	$	484