Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 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				Nine Months Ended				Nine Months Ended
	September 30, 2022				September 30, 2021				September 30, 2022				September 30, 2021
(millions)	Electric		Gas		Electric		Gas		Electric		Gas		Electric		Gas
Customer class:
Residential	$	433	$	39	$	366	$	34	$	1,065	$	193	$	912	$	170
Commercial		294		41		244		26		740		124		618		91
Industrial		153		54		112		27		396		128		295		67
Other		56		4		46		4		156		16		117		16
Revenues from contracts with customers		936		138		768		91		2,357		461		1,942		344
Other revenues		8		1		4		—		22		1		12		1
Total Operating Revenues	$	944	$	139	$	772	$	91	$	2,379	$	462	$	1,954	$	345

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)	September 30, 2022			December 31, 2021
Beginning balance	$	11		$	12
Amortization		(1	)		(1	)
Ending balance	$	10		$	11