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Accounts Receivable (All Registrants)
 3 Months Ended
Mar. 31, 2021
Credit Loss [Abstract]  
Accounts Receivable (All Registrants) [Text Block] Accounts Receivable (All Registrants)
Allowance for Credit Losses on Accounts Receivable (All Registrants)
The following tables present the rollforward of Allowance for Credit Losses on Customer Accounts Receivable.
Three Months Ended March 31, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2020$366 $32 $97 $116 $35 $86 $32 $22 $32 
Plus: Current period provision for expected credit losses(a)
104 34 21 20 9 20 11 6 3 
Less: Write-offs, net of recoveries(b)
28 1 15 6 1 5 2 3 — 
Balance as of March 31, 2021$442 $65 $103 $130 $43 $101 $41 $25 $35 
Three Months Ended March 31, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2019$243 $80 $59 $55 $12 $37 $13 $11 $13 
Plus: Current period provision for expected credit losses55 4 18 18 8 7 3 2 2 
Less: Write-offs, net of recoveries(b)
20 3 6 7 2 2 1 — 1 
Balance as of March 31, 2020$278 $81 $71 $66 $18 $42 $15 $13 $14 
_________
(a)For Generation, primarily relates to the impacts of the February 2021 extreme cold weather event. See Note 3 — Regulatory Matters for additional information. For the Utility Registrants, the increase is primarily as a result of increased receivable balances due to the colder weather and the increased aging of receivables, the temporary suspension of customer disconnections for non-payment, temporary cessation of new late payment fees, and reconnection of service to customers previously disconnected due to COVID-19.
(b)Recoveries were not material to the Registrants.
The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable.
Three Months Ended March 31, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2020$71 $— $21 $8 $9 $33 $13 $9 $11 
Plus: Current period provision for expected credit losses10 — 1 4 1 4 2 1 1 
Less: Write-offs, net of recoveries(a)
2 — — 1 1 — — — — 
Balance as of March 31, 2021$79 $— $22 $11 $9 $37 $15 $10 $12 
Three Months Ended March 31, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2019$48 $— $20 $7 $5 $16 $7 $4 $5 
Plus: Current period provision for expected credit losses8 — 3 1 2 2 1 — 1 
Less: Write-offs, net of recoveries(a)
4 — 1 1 2 — — — — 
Balance as of March 31, 2020$52 $— $22 $7 $5 $18 $8 $4 $6 
_________
(a)Recoveries were not material to the Registrants.

Unbilled Customer Revenue (All Registrants)
The following table provides additional information about unbilled customer revenues recorded in the Registrants' Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020.
Unbilled customer revenues(a)
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
March 31, 2021$1,178 $671 $161 $102 $126 $118 $58 $38 $22 
December 31, 2020998 258 218 147 197 178 87 62 29 
_________
(a)Unbilled customer revenues are classified in Customer accounts receivables, net in the Registrants' Consolidated Balance Sheets.
Sales of Customer Accounts Receivable (Exelon and Generation)
On April 8, 2020, NER, a bankruptcy remote, special purpose entity, which is wholly-owned by Generation, entered into a revolving accounts receivable financing arrangement with a number of financial institutions and a commercial paper conduit (the Purchasers) to sell certain customer accounts receivable (the Facility). The Facility had a maximum funding limit of $750 million and was scheduled to expire on April 7, 2021, unless renewed by the mutual consent of the parties in accordance with its terms. The Facility was renewed on March 29, 2021. The Facility term was extended through March 29, 2024, unless further renewed by the mutual consent of the parties, and the maximum funding limit was increased to $900 million. Under the Facility, NER may sell eligible short-term customer accounts receivable to the Purchasers in exchange for cash and subordinated interest. The transfers are reported as sales of receivables in Exelon’s and Generation’s consolidated financial statements. The subordinated interest in collections upon the receivables sold to the Purchasers is referred to as the DPP, which is reflected in Other current assets on Exelon’s and Generation’s Consolidated Balance Sheets.
On April 8, 2020, Generation derecognized and transferred approximately $1.2 billion of receivables at fair value to the Purchasers in exchange for approximately $500 million in cash purchase price and $650 million of DPP.
On February 17, 2021, Generation received additional cash of $250 million from the Purchasers for the remaining available funding in the Facility.
On March 31, 2021, Generation received cash of approximately $150 million from the Purchasers in connection with the increased funding limit at the time of the Facility renewal.
The following table summarizes the impact of the sale of certain receivables:
March 31, 2021December 31, 2020
Derecognized receivables transferred at fair value$1,301 $1,139 
Cash proceeds received900 500 
DPP401 639 
Three Months Ended March 31, 2021
Loss on sale of receivables(a)
$17 
_________
(a)Reflected in Operating and maintenance expense on Exelon's and Generation's Consolidated Statement of Operations and Comprehensive Income.
Three Months Ended March 31, 2021
Proceeds from new transfers(a)
$1,036 
Cash collections received on DPP and reinvested in the Facility(b)
1,174 
Cash collections reinvested in the Facility2,210 
_________
(a)Customer accounts receivable sold into the Facility were $2,375 million for the three months ended March 31, 2021.
(b)Does not include the $400 million in cash proceeds received from the Purchasers in the first quarter of 2021.
Generation’s risk of loss following the transfer of accounts receivable is limited to the DPP outstanding.  Payment of DPP is not subject to significant risks other than delinquencies and credit losses on accounts receivable transferred, which have historically been and are expected to be immaterial. Generation continues to service the receivables sold in exchange for a servicing fee. Generation did not record a servicing asset or liability as the servicing fees were immaterial.
Generation recognizes the cash proceeds received upon sale in Net cash provided by operating activities in the Consolidated Statement of Cash Flows. The collection and reinvestment of DPP is recognized in Net cash provided by investing activities of the Consolidated Statement of Cash Flows.
See Note 13 — Fair Value of Financial Assets and Liabilities and Note 16 — Variable Interest Entities for additional information.
Other Purchases and Sales of Customer and Other Accounts Receivables (All Registrants)
Generation is required, under supplier tariffs in ISO-NE, MISO, NYISO, and PJM, to sell customer and other receivables to utility companies, which include the Utility Registrants. The Utility Registrants are required, under separate legislation and regulations in Illinois, Pennsylvania, Maryland, District of Columbia, and New Jersey, to purchase certain receivables from alternative retail electric and, as applicable, natural gas suppliers that participate in the utilities' consolidated billing. The following tables present the total receivables purchased and sold.
Three Months Ended March 31, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Total receivables purchased$1,011 $— $266 $290 $199 $268 $166 $56 $46 
Total receivables sold69 81 — — — — — — — 
Related party transactions:
Receivables purchased from Generation— — — — 12 — — — — 
Receivables sold to the Utility Registrants— 12 — — — — — — — 
Three Months Ended March 31, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Total receivables purchased$781 $— $280 $284 $195 $264 $165 $53 $46 
Total receivables sold507 749 — — — — — — — 
Related party transactions:
Receivables purchased from Generation— — 34 67 69 72 51 13 8 
Receivables sold to the Utility Registrants— 242 — — — — — — —