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Accounts Receivable (Tables)
 6 Months Ended
Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]  
Allowance for credit loss rollforward
The following tables present the rollforward of Allowance for Credit Losses on Customer Accounts Receivable.
Three Months Ended June 30, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of March 31, 2021$442 $65 $103 $130 $43 $101 $41 $25 $35 
Plus: Current period provision for expected credit losses(29)13 (9)(14)(14)(5)(1)(5)1 
Less: Write-offs, net of recoveries(a)
18 3 5 5 2 3 2 1 — 
Balance as of June 30, 2021$395 $75 $89 $111 $27 $93 $38 $19 $36 
Three Months Ended June 30, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of March 31, 2020$278 $81 $71 $66 $18 $42 $15 $13 $14 
Plus: Current period provision for expected credit losses51 9 7 10 6 19 8 5 6 
Less: Write-offs, net of recoveries(a)
12 1 6 5 1 (1)(1)— — 
Less: Sale of customer accounts receivable(b)
56 56 — — — — — — — 
Balance as of June 30, 2020$261 $33 $72 $71 $23 $62 $24 $18 $20 
Six Months Ended June 30, 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(c)
75 47 12 6 (5)15 10 1 4 
Less: Write-offs, net of recoveries(a)
46 4 20 11 3 8 4 4 — 
Balance as of June 30, 2021$395 $75 $89 $111 $27 $93 $38 $19 $36 
Six Months Ended June 30, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2019$243 $80 $59 $55 $12 $37 $13 $11 $13 
Plus: Current period provision for expected credit losses106 13 25 28 14 26 11 7 8 
Less: Write-offs, net of recoveries(a)
32 4 12 12 3 1 — — 1 
Less: Sale of customer accounts receivable(b)
56 56 — — — — — — — 
Balance as of June 30, 2020$261 $33 $72 $71 $23 $62 $24 $18 $20 
__________
(a)Recoveries were not material to the Registrants.
(b)See below for additional information on the sale of customer accounts receivable at Generation in the second quarter of 2020.
(c)For Generation, primarily relates to the impacts of the February 2021 extreme cold weather event. See Note 3 — Regulatory Matters for additional information.
The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable.
Three Months Ended June 30, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of March 31, 2021$79 $— $22 $11 $9 $37 $15 $10 $12 
Plus: Current period provision for expected credit losses(4)1 (3)(3)— 1 1 (1)1 
Less: Write-offs, net of recoveries(a)
3 — 1 1 1 — — — — 
Balance as of June 30, 2021$72 $1 $18 $7 $8 $38 $16 $9 $13 
Three Months Ended June 30, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of March 31, 2020$52 $— $22 $7 $5 $18 $8 $4 $6 
Plus: Current period provision for expected credit losses12 — 1 1 2 8 3 3 2 
Less: Write-offs, net of recoveries(a)
3 — 1 1 1 — — — — 
Balance as of June 30, 2020$61 $— $22 $7 $6 $26 $11 $7 $8 
Six Months Ended June 30, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2020$71 $— $21 $8 $9 $33 $13 $9 $11 
Plus: Current period provision for expected credit losses6 1 (2)1 1 5 3 — 2 
Less: Write-offs, net of recoveries(a)
5 — 1 2 2 — — — — 
Balance as of June 30, 2021$72 $1 $18 $7 $8 $38 $16 $9 $13 
Six Months Ended June 30, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Balance as of December 31, 2019$48 $— $20 $7 $5 $16 $7 $4 $5 
Plus: Current period provision for expected credit losses20 — 4 2 4 10 4 3 3 
Less: Write-offs, net of recoveries(a)
7 — 2 2 3 — — — — 
Balance as of June 30, 2020$61 $— $22 $7 $6 $26 $11 $7 $8 
__________
(a)Recoveries were not material to the Registrants.
Unbilled customer revenue
The following table provides additional information about unbilled customer revenues recorded in the Registrants' Consolidated Balance Sheets as of June 30, 2021 and December 31, 2020.
Unbilled customer revenues(a)
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
June 30, 2021$1,029 $329 $263 $131 $119 $187 $90 $39 $58 
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.
Purchases and sales of accounts receivable
The following table summarizes the impact of the sale of certain receivables:
June 30, 2021December 31, 2020
Derecognized receivables transferred at fair value$1,274 $1,139 
Cash proceeds received900 500 
DPP374 639 
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Loss on sale of receivables(a)
$8 $15 $25 $15 
__________
(a)Reflected in Operating and maintenance expense on Exelon's and Generation's Consolidated Statements of Operations and Comprehensive Income.
Six Months Ended June 30,
20212020
Proceeds from new transfers(a)
$2,689 $927 
Cash collections received on DPP and reinvested in the Facility(b)
1,809 1,102 
Cash collections reinvested in the Facility4,498 2,029 
__________
(a)Customer accounts receivable sold into the Facility were $4,647 million and $2,032 million for the six months ended June 30, 2021 and June 30, 2020, respectively
(b)Does not include the $400 million in cash proceeds received from the Purchasers in the first quarter of 2021.
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, Delaware, 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.
Six Months Ended June 30, 2021
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Total receivables purchased$1,823 $— $485 $507 $343 $503 $310 $103 $90 
Total receivables sold92 107 — — — — — — — 
Related party transactions:
Receivables purchased from Generation— — — — 15 — — — — 
Receivables sold to the Utility Registrants— 15 — — — — — — — 
Six Months Ended June 30, 2020
ExelonGenerationComEdPECOBGEPHIPepcoDPLACE
Total receivables purchased$1,584 $— $518 $494 $333 $485 $303 $98 $84 
Total receivables sold533 779 — — — — — — — 
Related party transactions:
Receivables purchased from Generation— — 34 67 73 72 51 13 8 
Receivables sold to the Utility Registrants— 246 — — — — — — —