XML 61 R22.htm IDEA: XBRL DOCUMENT v3.4.0.3
Asset Retirement Obligations
3 Months Ended
Mar. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations
Asset Retirement Obligations

The changes in the carrying amounts of Talen Energy's AROs were as follows.
Balance at December 31, 2015
$
501

Accretion expense
9

Changes in estimate of cash flow or settlement date
1

Obligations settled
(1
)
Balance at March 31, 2016
$
510



Substantially all of the ARO balances are classified as noncurrent at March 31, 2016 and December 31, 2015.         

Talen Energy's most significant ARO recorded relates to the decommissioning of the Susquehanna nuclear plant. See Notes 12 and 15 for additional information on the assets in the NDT funds that are legally restricted for the purposes of settling this ARO.