Operating Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue

DESC’s operating revenue consists of the following:

Year Ended December 31,	2023				2022				2021
(millions)	Electric		Gas		Electric		Gas		Electric		Gas
Customer class:
Residential	$	1,160	$	268	$	1,375	$	303	$	1,211	$	245
Commercial		820		129		968		184		834		133
Industrial		372		77		533		166		424		103
Other		150		24		203		23		157		25
Revenues from contracts with customers		2,502		498		3,079		676		2,626		506
Other revenues		27		1		27		1		13		1
Total Operating Revenues	$	2,529	$	499	$	3,106	$	677	$	2,639	$	507

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)	2023			2022
Beginning balance	$	9		$	11
Additional costs		3			—
Amortization		(1	)		(2	)
Ending balance	$	11		$	9