Operating Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Revenue Recognition And Deferred Revenue [Abstract]

Disaggregation of Revenue

DESC’s operating revenue consists of the following:

Year Ended December 31,	2022				2021				2020
(millions)	Electric		Gas		Electric		Gas		Electric		Gas
Customer class:
Residential	$	1,375	$	303	$	1,211	$	245	$	1,127	$	201
Commercial		968		184		834		133		746		103
Industrial		533		166		424		103		341		65
Other		203		23		157		25		123		18
Revenues from contracts with customers		3,079		676		2,626		506		2,337		387
Other revenues		27		1		13		1		15		—
Total Operating Revenues	$	3,106	$	677	$	2,639	$	507	$	2,352	$	387

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)	2022			2021
Beginning balance	$	11		$	12
Amortization		(2	)		(1	)
Ending balance	$	9		$	11