Operating Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue Recognition And Deferred Revenue [Abstract]

Operating Revenue Subsequent to the Adoption of Guidance for Revenue Recognition from Contracts with Customers

DESC’s operating revenue consists of the following:

Year Ended December 31,	2021				2020
(millions)	Electric		Gas		Electric		Gas
Customer class:
Residential	$	1,211	$	245	$	1,127	$	201
Commercial		834		133		746		103
Industrial		424		103		341		65
Other		157		25		123		18
Revenues from contracts with customers		2,626		506		2,337		387
Other revenues		13		1		15		—
Total Operating Revenues	$	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)	2021			2020
Beginning balance, January 1	$	12		$	13
Amortization		(1	)		(1	)
Ending balance, December 31	$	11		$	12