Revenue (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Summary of Revenue

The following table is a summary of SCE's revenue:

	Three months ended September 30, 2018							Three months ended September 30, 2017
(in millions)	Earning Activities			Cost- Recovery Activities		Total Consolidated		Earning Activities		Cost-Recovery Activities		Total Consolidated
Revenues from contracts with customers1	$	1,851		$	2,255	$	4,106	*		*		*
Alternative revenue programs and other operating revenue	(74		)	228		154		*		*		*
Total operating revenue	$	1,777		$	2,483	$	4,260	$	1,677	$	1,975	$	3,652

^* As discussed in Note 1, prior period amounts have not been adjusted under the modified retrospective method.

¹  During the three months ended September 30, 2018, SCE recorded CPUC revenue based on the 2017 authorized revenue requirements adjusted for the July 2017 cost of capital decision and Tax Reform pending the outcome of the 2018 GRC. These revenue adjustments are included in "Revenues from contracts with customers."

	Nine months ended September 30, 2018							Nine months ended September 30, 2017
(in millions)	Earning Activities			Cost- Recovery Activities		Total Consolidated		Earning Activities		Cost-Recovery Activities		Total Consolidated
Revenues from contracts with customers1	$	4,921		$	4,593	$	9,514	*		*		*
Alternative revenue programs and other operating revenue	(96		)	199		103		*		*		*
Total operating revenue	$	4,825		$	4,792	$	9,617	$	4,813	$	4,248	$	9,061

^* As discussed in Note 1, prior period amounts have not been adjusted under the modified retrospective method.

¹  During the nine months ended September 30, 2018, SCE recorded CPUC revenue based on the 2017 authorized revenue requirements adjusted for the July 2017 cost of capital decision and Tax Reform pending the outcome of the 2018 GRC. These revenue adjustments are included in "Revenues from contracts with customers."

Receivables, Accrued Unbilled Revenue and Contract Liabilities

The following table provides a summary of significant changes in SCE's contract liabilities:

(in millions)	2018
Balance at January 1,	$	20
Additions	37
Revenue recognized during the period	(35		)
Balance at September 30,	$	22

The following table provides information about SCE's receivables, accrued unbilled revenue and contract liabilities related to contracts from customers:

(in millions)	September 30, 2018		December 31, 2017
Receivables:
Billed revenue	$	907	$	613
Accrued unbilled revenues	505		212
Total receivables	$	1,412	$	825
Contract liabilities1	$	22	$	20

¹  Contract liabilities are included in "Other current liabilities" and "Other deferred credits and long-term liabilities" on the consolidated balance sheets.

Activities in the Allowance for Doubtful Accounts

SCE's contract receivables are shown above, gross of allowance for uncollectible accounts. Activities in the allowance for doubtful accounts for SCE's contracts with customers were as follows:

(in millions)	2018
Balance at January 1,	$	36
Charged to costs and expenses	19
Write-offs	(17		)
Balance at September 30,	$	38