Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The following table provides a rollforward of the contract assets and liabilities reflected in Exelon's and Generation's Consolidated Balance Sheets for the three months ended March 31, 2019 and March 31, 2020

	Contract Assets						Contract Liabilities
	Exelon			Generation			Exelon			Generation
Balance as of December 31, 2018	$	187		$	187		$	27		$	42
Consideration received or due	(26		)	(26		)	21			63
Revenues recognized (a)	26			26			(23		)	(66		)
Balance at March 31, 2019	$	187		$	187		$	25		$	39
Balance as of December 31, 2019	$	174		$	174		$	33		$	71
Consideration received or due	(19		)	(19		)	20			55
Revenues recognized (b)	17			17			(24		)	(70		)
Balance at March 31, 2020	$	172		$	172		$	29		$	56

__________

(a) Revenues recognized in the three months ended March 31, 2019, which were included in contract liabilities at December 31, 2018, were approximately $5 million for both Exelon and Generation.

(b)

Revenues recognized in the three months ended March 31, 2020, which were included in contract liabilities at December 31, 2019, were approximately $9 million and $19 million for Exelon and Generation, respectively.

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

The following table shows the amounts of future revenues expected to be recorded in each year for performance obligations that are unsatisfied or partially unsatisfied as of March 31, 2020. This disclosure only includes contracts for which the total consideration is fixed and determinable at contract inception. The average contract term varies by customer type and commodity but ranges from one month to several years.

This disclosure excludes Generation's power and gas sales contracts as they contain variable volumes and/or variable pricing. This disclosure also excludes the Utility Registrants' gas and electric tariff sales contracts and transmission revenue contracts as they generally have an original expected duration of one year or less and, therefore, do not contain any future, unsatisfied performance obligations to be included in this disclosure.

	2020		2021		2022		2023		2024 and thereafter		Total
Exelon	$	273	$	144	$	64	$	45	$	198	$	724
Generation	330		200		79		45		198		852