Revenue Recognition

3 Months Ended

Mar. 31, 2021

Revenue From Contract With Customer [Abstract]

Revenue Recognition

3. REVENUE RECOGNITION

DESC has disaggregated operating revenues by customer class as follows:

	Three Months Ended				Three Months Ended
	March 31, 2021				March 31, 2020
(millions)	Electric		Gas		Electric		Gas
Customer class:
Residential	$	275	$	98	$	252	$	79
Commercial		175		39		175		33
Industrial		88		22		80		17
Other		33		5		30		4
Revenues from contracts with    customers		571		164		537		133
Other revenues		8		1		2		—
Total Operating Revenues	$	579	$	165	$	539	$	133

Contract liabilities represent the obligation to transfer goods or services to a customer for which consideration has already been received from the customer. DESC had contract liability balances of $5 million at both March 31, 2021 and December 31, 2020. During the three months ended March 31, 2021 and 2020, DESC recognized revenue of $3 million and $5 million, respectively, from the beginning contract liability balances as DESC fulfilled its obligations to provide service to its customers. Contract liabilities are recorded in customer deposits and customer prepayments in the Consolidated Balance Sheets.