Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

The following table presents, for the years ended December 31, 2020 and 2019, revenue from contracts with customers as defined in Accounting Standards Codification (ASC) Topic 606, "Revenue from Contracts with Customers," as well as additional revenue from sources other than contracts with customers, disaggregated by major source.


	2020				2019				2018
(Millions of Dollars)	Revenues from contracts with customers		Other revenues (a)	Total operating revenues	Revenues from contracts with customers		Other revenues (a)	Total operating revenues	Revenues from contracts with customers		Other revenues (a)	Total operating revenues
CECONY
Electric	$8,026		$77	$8,103	$7,913		$149	$8,062	$7,920		$51	$7,971
Gas	1,998		38	2,036	2,097		35	2,132	2,052		26	2,078
Steam	494		14	508	610		17	627	625		6	631
Total CECONY	$10,518		$129	$10,647	$10,620		$201	$10,821	$10,597		$83	$10,680
O&R
Electric	619		10	629	627		7	634	647		(5)	642
Gas	224		9	233	247		12	259	256		(7)	249
Total O&R	$843		$19	$862	$874		$19	$893	$903		$(12)	$891
Clean Energy Businesses
Renewables	609	(b)	—	609	575	(b)	—	575	329	(b)	—	329
Energy services	52		—	52	71		—	71	95		—	95
Other	—		75	75	—		211	211	—		339	339
Total Clean Energy Businesses	$661		$75	$736	$646		$211	$857	$424		$339	$763
Con Edison Transmission	4		—	4	4		—	4	4		—	4
Other (c)	—		(3)	(3)	—		(1)	(1)	—		(1)	(1)
Total Con Edison	$12,026		$220	$12,246	$12,144		$430	$12,574	$11,928		$409	$12,337

(a) For the Utilities, this includes revenue from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans. For the Clean Energy Businesses, this includes revenue from wholesale services.

(b) Included within the totals for Renewables revenue at the Clean Energy Businesses is $8 million, $14 million and $103 million for the years ended December 31, 2020, 2019 and 2018, respectively, of revenue related to engineering, procurement and construction services.

Change in Unbilled Contract and Unearned Revenues


	2020			2019			2018
(Millions of Dollars)	Unbilled contract revenue (a)	Unearned revenue (b)		Unbilled contract revenue (a)	Unearned revenue (b)		Unbilled contract revenue (a)	Unearned revenue (b)
Beginning balance as of January 1,	$29	$17		$29	$20		$58	$87
Additions (c)	88	31		86	1		144	38
Subtractions (c)	106	7	(d)	86	4	(d)	173	105	(d)
Ending balance as of December 31,	$11	$41		$29	$17		$29	$20

(a)Unbilled contract revenue represents accumulated incurred costs and earned profits on contracts (revenue arrangements), which have been recorded as revenue, but have not yet been billed to customers, and which represent contract assets as defined in Topic 606. Substantially all accrued unbilled contract revenue is expected to be collected within one year. Unbilled contract revenue arises from the cost-to-cost method of revenue recognition. Unbilled contract revenue from fixed-price type contracts is converted to billed receivables when amounts are invoiced to customers according to contractual billing terms, which generally occur when deliveries or other performance milestones are completed.

(b)Unearned revenue represents a liability for billings to customers in excess of earned revenue, which are contract liabilities as defined in Topic 606.

(c)Additions for unbilled contract revenue and subtractions for unearned revenue represent additional revenue earned. Additions for unearned revenue and subtractions for unbilled contract revenue represent billings. Activity also includes appropriate balance sheet classification for the period.

(d)Of the subtractions from unearned revenue, $7 million, $4 million and $50 million were included in the balances as of January 1, 2020, 2019, and 2018, respectively.