Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2022

Revenue From Contract With Customer [Abstract]

Disaggregation of Revenue

DESC has disaggregated operating revenues by customer class as follows:

	Three Months Ended				Three Months Ended
	March 31, 2022				March 31, 2021
(millions)	Electric		Gas		Electric		Gas
Customer class:
Residential	$	300	$	109	$	275	$	98
Commercial		201		48		175		39
Industrial		108		31		88		22
Other		38		6		33		5
Revenues from contracts with customers		647		194		571		164
Other revenues		8		—		8		1
Total Operating Revenues	$	655	$	194	$	579	$	165

Balance and Activity Related to Contract Costs Deferred as Regulatory Assets

Balances and activity related to contract costs deferred as regulatory assets were as follows:

	Regulatory Assets
(millions)	March 31, 2022			December 31, 2021
Beginning balance	$	11		$	12
Amortization		(1	)		(1	)
Ending balance	$	10		$	11