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Revenue from Contracts with Customers (All Registrants)
 9 Months Ended
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers [Text Block] Revenue from Contracts with Customers (All Registrants)
The Registrants recognize revenue from contracts with customers to depict the transfer of goods or services to customers at an amount that the entities expect to be entitled to in exchange for those goods or services. Generation’s primary sources of revenue include competitive sales of power, natural gas, and other energy-related products and services. The Utility Registrants’ primary sources of revenue include regulated electric and gas tariff sales, distribution, and transmission services.
See Note 4 — Revenue from Contracts with Customers of the Exelon 2019 Form 10-K for additional information regarding the primary sources of revenue for the Registrants.
Contract Balances (All Registrants)
Contract Assets
Generation records contract assets for the revenue recognized on the construction and installation of energy efficiency assets and new power generating facilities before Generation has an unconditional right to bill for and receive the consideration from the customer. These contract assets are subsequently reclassified to receivables when the right to payment becomes unconditional. Generation records contract assets and contract receivables within Other current assets and Customer accounts receivable, net, respectively, within Exelon’s and Generation’s Consolidated Balance Sheets.
The following table provides a rollforward of the contract assets reflected in Exelon's and Generation's Consolidated Balance Sheets for the three and nine months ended September 30, 2020 and 2019. The Utility Registrants do not have any contract assets.
ExelonGeneration
Balance as of December 31, 2019$174 $174 
Amounts reclassified to receivables(19)(19)
Revenues recognized17 17 
Balance at March 31, 2020$172 $172 
Amounts reclassified to receivables(26)(26)
Revenues recognized13 13 
Balance at June 30, 2020$159 $159 
Amounts reclassified to receivables(18)(18)
Revenues recognized19 19 
Balance at September 30, 2020$160 $160 
ExelonGeneration
Balance as of December 31, 2018$187 $187 
Amounts reclassified to receivables(26)(26)
Revenues recognized26 26 
Balance at March 31, 2019$187 $187 
Amounts reclassified to receivables(18)(18)
Revenues recognized27 27 
Balance at June 30, 2019$196 $196 
Amounts reclassified to receivables(65)(65)
Revenues recognized39 39 
Balance at September 30, 2019$170 $170 
Contract Liabilities
The Registrants record contract liabilities when consideration is received or due prior to the satisfaction of the performance obligations. The Registrants record contract liabilities within Other current liabilities and Other noncurrent liabilities within the Registrants' Consolidated Balance Sheets.
For Generation, these contract liabilities primarily relate to upfront consideration received or due for equipment service plans, solar panel leases, and the Illinois ZEC program that introduces a cap on the total consideration to be received by Generation.
On July 1, 2020, Pepco, DPL, and ACE each entered into a collaborative arrangement with an unrelated owner and manager of communication infrastructure (the Buyer). Under this arrangement, Pepco, DPL, and ACE sold a 60% undivided interest in their respective portfolios of transmission tower attachment agreements with telecommunications companies to the Buyer, in addition to transitioning management of the day-to-day operations of the jointly-owned agreements to the Buyer for 35 years, while retaining the safe and reliable operation of its utility assets. In return, Pepco, DPL, and ACE will provide the Buyer limited access on the portion of the towers where the equipment resides for the purposes of managing the agreements for the benefit of Pepco, DPL, ACE, and the Buyer. In addition, for an initial period of three years and two, two-year extensions that are subject to certain conditions, the Buyer has the exclusive right to enter into new agreements with telecommunications companies and to receive a 30% undivided interest in those new agreements. PHI, Pepco, DPL, and ACE received cash and recorded contract liabilities as of July 1, 2020 as shown in the table below. The revenue attributable to this arrangement will be recognized as operating revenue over the 35 years under the collaborative arrangement.
The following table provides a rollforward of the contract liabilities reflected in Exelon's, Generation's, PHI's, Pepco's, DPL's, and ACE'S Consolidated Balance Sheets for the three and nine months ended September 30, 2020 and 2019. As of September 30, 2020 and December 31, 2019, ComEd's, PECO's, and BGE's contract liabilities were immaterial.
ExelonGenerationPHIPepcoDPLACE
Balance as of December 31, 2019$33 $71 $— $— $— $— 
Consideration received or due20 55 — — — — 
Revenues recognized(24)(70)— — — — 
Balance at March 31, 2020$29 $56 $— $— $— $— 
Consideration received or due13 34 — — — — 
Revenues recognized(22)(63)— — — — 
Balance at June 30, 2020$20 $27 $— $— $— $— 
Consideration received or due154 94 124 98 13 13 
Revenues recognized(25)(65)(2)(2)— — 
Balance at September 30, 2020$149 $56 $122 $96 $13 $13 
ExelonGenerationPHIPepcoDPLACE
Balance as of December 31, 2018$27 $42 $— $— $— $— 
Consideration received or due21 63 — — — — 
Revenues recognized(23)(66)— — — — 
Balance at March 31, 2019$25 $39 $— $— $— $— 
Consideration received or due17 52 — — — — 
Revenues recognized(21)(65)— — — — 
Balance at June 30, 2019$21 $26 $— $— $— $— 
Consideration received or due27 83 — — — — 
Revenues recognized(22)(61)— — — — 
Balance at September 30, 2019$26 $48 $— $— $— $— 
The following table reflects revenues recognized in the three and nine months ended September 30, 2020 and 2019, which were included in contract liabilities at December 31, 2019 and 2018, respectively:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
Exelon$2 $3 $25 $17 
Generation2 3 63 32 
Transaction Price Allocated to Remaining Performance Obligations (All Registrants)
The following table shows the amounts of future revenues expected to be recorded in each year for performance obligations that are unsatisfied or partially unsatisfied as of September 30, 2020. This disclosure only includes contracts for which the total consideration is fixed and determinable at contract inception. The average contract term varies by customer type and commodity but ranges from one month to several years.
This disclosure excludes Generation's power and gas sales contracts as they contain variable volumes and/or variable pricing. This disclosure also excludes the Utility Registrants' gas and electric tariff sales contracts and transmission revenue contracts as they generally have an original expected duration of one year or less and, therefore, do not contain any future, unsatisfied performance obligations to be included in this disclosure.
20202021202220232024 and thereafterTotal
Exelon$92 $223 $93 $53 $370 $831 
Generation136 313 123 53 275 900 
PHI2 9 8 8 95 122 
Pepco2 7 6 6 75 96 
DPL— 1 1 1 10 13 
ACE— 1 1 1 10 13 
Revenue Disaggregation (All Registrants)
The Registrants disaggregate revenue recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. See Note 4 — Segment Information for the presentation of the Registrant's revenue disaggregation.