Nuclear Decommissioning (Tables)

9 Months Ended

Sep. 30, 2020

Schedule Of Nuclear Decommissioning [Line Items]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The following table provides a rollforward of the nuclear decommissioning ARO reflected in Exelon’s and Generation’s Consolidated Balance Sheets from December 31, 2019 to September 30, 2020:

Nuclear decommissioning ARO at December 31, 2019 (a)	$	10,504
Accretion expense	367
Net increase due to changes in, and timing of, estimated future cash flows	806
Costs incurred related to decommissioning plants	(59)
Nuclear decommissioning ARO at September 30, 2020 (a)	$	11,618

_________

(a)Includes $93 million and $112 million as the current portion of the ARO at September 30, 2020 and December 31, 2019, respectively, which is included in Other current liabilities in Exelon’s and Generation’s Consolidated Balance Sheets.