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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Components of Lease Cost [Table Text Block]
The components of operating lease costs were as follows:
Exelon ComEdPECOBGE PHIPepcoDPLACE
For the year ended December 31, 2021
Operating lease costs$245 $3 $— $30 $43 $10 $12 $6 
Variable lease costs175 1 — 1 1 — — — 
Short-term lease costs— — — — — — — — 
Total lease costs(a)
$420 $4 $— $31 $44 $10 $12 $6 
For the year ended December 31, 2020
Operating lease costs$292 $3 $1 $33 $46 $11 $13 $6 
Variable lease costs241 1 — 1 2 1 1 — 
Short-term lease costs2 — — — — — — — 
Total lease costs(a)
$535 $4 $1 $34 $48 $12 $14 $6 
For the year ended December 31, 2019
Operating lease costs$320 $3 $1 $33 $48 $12 $14 $7 
Variable lease costs300 2 — 2 6 2 2 1 
Short-term lease costs19 — — — — — — — 
Total lease costs(a)
$639 $5 $1 $35 $54 $14 $16 $8 
__________
(a)Excludes sublease income recorded at Exelon, PHI, and DPL of $48 million, $4 million, and $4 million, respectively, for the year ended December 31, 2021, $48 million, $4 million, and $4 million, respectively, for the year ended December 31, 2020, and $51 million, $7 million, and $7 million, respectively, for the year ended December 31, 2019.
PHI, Pepco, DPL, and ACE recorded finance lease costs of $13 million, $5 million, $5 million, and $3 million, respectively, for the year ended December 31, 2021 and $9 million, $3 million, $4 million, and $2 million, respectively, for the year ended December 31, 2020.
The weighted average remaining lease terms, in years, for operating and finance leases were as follows:
Operating Leases
Exelon ComEdPECOBGE PHIPepcoDPLACE
As of December 31, 20219.83.36.113.77.58.68.53.5
As of December 31, 202010.13.84.28.38.29.19.14.0
As of December 31, 201910.14.64.45.49.09.89.74.7
Finance Leases
PHIPepcoDPLACE
As of December 31, 20216.15.96.16.3
As of December 31, 20206.56.36.56.5
The weighted average discount rates for operating and finance leases were as follows:
Operating Leases
ExelonComEdPECOBGEPHIPepcoDPLACE
As of December 31, 20214.7 %2.8 %2.2 %4.0 %4.2 %4.0 %4.0 %3.4 %
As of December 31, 20204.7 %3.0 %2.9 %3.8 %4.2 %4.0 %4.0 %3.5 %
As of December 31, 20194.6 %3.0 %3.2 %3.6 %4.2 %4.0 %4.0 %3.6 %


Finance Leases
PHIPepcoDPLACE
As of December 31, 20212.2 %2.3 %2.1 %2.1 %
As of December 31, 20202.5 %2.6 %2.4 %2.4 %
ROU assets obtained in exchange for operating and finance lease obligations were as follows:
Operating Leases
ExelonComEdPECOBGEPHIPepcoDPLACE
For the year ended December 31, 2021$(1)$— $— $(1)$1 $— $1 $— 
For the year ended December 31, 20201 — 1 — (1)— (1)— 
For the year ended December 31, 201952 6 — 2 (3)(1)(2)(1)
Finance Leases
PHIPepcoDPLACE
For the year ended December 31, 2021$32 $12 $12 $8 
For the year ended December 31, 202029 8 14 7 
Supplemental Balance Sheet Information Related to Lessee Right-of-Use Assets and Lease Liabilities [Table Text Block]
The following tables provide additional information regarding the presentation of operating and finance lease ROU assets and lease liabilities within the Registrants’ Consolidated Balance Sheets:
Operating Leases
Exelon(a)
 ComEdPECOBGE PHIPepcoDPLACE
As of December 31, 2021
Operating lease ROU assets
Other deferred debits and other assets$875 $5 $1 $16 $209 $43 $46 $11 
Operating lease liabilities
Other current liabilities124 2 — 15 31 6 8 3 
Other deferred credits and other liabilities968 3 1 4 195 40 49 9 
Total operating lease liabilities$1,092 $5 $1 $19 $226 $46 $57 $12 
As of December 31, 2020
Operating lease ROU assets
Other deferred debits and other assets$1,064 $7 $1 $46 $241 $49 $54 $15 
Operating lease liabilities
Other current liabilities213 3 — 45 31 6 9 4 
Other deferred credits and other liabilities1,089 5 1 19 224 46 56 11 
Total operating lease liabilities$1,302 $8 $1 $64 $255 $52 $65 $15 
__________
(a)Exelon's operating ROU assets and lease liabilities include $293 million and $429 million, respectively, related to contracted generation as of December 31, 2021, and $387 million and $528 million, respectively, as of December 31, 2020.

Finance Leases
PHIPepcoDPLACE
As of December 31, 2021
Finance lease ROU assets
Plant, property and equipment, net$73 $25 $29 $19 
Finance lease liabilities
Long-term debt due within one year10 3 4 3 
Long-term debt64 23 25 16 
Total finance lease liabilities$74 $26 $29 $19 
As of December 31, 2020
Finance lease ROU assets
Plant, property and equipment, net$50 $17 $20 $13 
Finance lease liabilities
Long-term debt due within one year7 2 3 2 
Long-term debt43 15 17 11 
Total finance lease liabilities$50 $17 $20 $13 
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Future minimum lease payments for operating and finance leases as of December 31, 2021 were as follows:
Operating Leases
YearExelon ComEdPECOBGE PHIPepcoDPLACE
2022$156 $2 $— $16 $38 $8 $10 $4 
2023144 1 — 1 37 7 10 3 
2024140 1 — — 36 7 8 3 
2025140 1 — — 34 6 7 2 
2026135 — — — 29 5 5 1 
Remaining years693 — 1 18 94 22 30 — 
Total1,408 5 1 35 268 55 70 13 
Interest316 — — 16 42 9 13 1 
Total operating lease liabilities$1,092 $5 $1 $19 $226 $46 $57 $12 
Finance Lease, Liability, Fiscal Year Maturity
Finance Leases
YearPHIPepcoDPLACE
2022$12 $4 $5 $3 
202312 4 5 3 
202413 5 5 3 
202512 4 5 3 
202612 4 5 3 
Remaining years18 6 7 5 
Total79 27 32 20 
Interest5 1 3 1 
Total finance lease liabilities$74 $26 $29 $19 
Schedule of Supplemental Cash Flow Information Related to Leases [Table Text Block]
Cash paid for amounts included in the measurement of operating and finance lease liabilities were as follows:
Operating cash flows from operating leases
ExelonComEdPECOBGEPHIPepcoDPLACE
For the year ended December 31, 2021$255 $3 $— $46 $39 $8 $9 $4 
For the year ended December 31, 2020271 3 1 20 39 8 9 4 
For the year ended December 31, 2019287 3 — 33 37 9 6 5 
Financing cash flows from finance leases
PHIPepcoDPLACE
For the year ended December 31, 2021$10 $3 $4 $3 
For the year ended December 31, 20206 2 3 1 
Components of Operating Lease Income [Table Text Block]
The components of lease income were as follows:
Exelon ComEdPECOBGE PHIPepcoDPLACE
For the year ended December 31, 2021
Operating lease income$52 $— $— $— $4 $— $3 $— 
Variable lease income262 — — — 1 — 1 — 
For the year ended December 31, 2020
Operating lease income$52 $— $— $— $3 $— $3 $— 
Variable lease income283 — — — 1 — 1 — 
For the year ended December 31, 2019
Operating lease income$54 $— $— $— $5 $— $4 $— 
Variable lease income261 — — — 3 — 3 — 
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]
Future minimum lease payments to be recovered under operating leases as of December 31, 2021 were as follows:
YearExelon ComEdPECOBGE PHIPepcoDPLACE
2022$50 $— $— $— $4 $— $3 $— 
202349 — — — 3 — 3 — 
202449 — — — 4 — 4 — 
202549 — — — 4 — 4 — 
202649 — — — 4 — 4 — 
Remaining years169 1 4 1 26 — 26 — 
Total $415 $1 $4 $1 $45 $— $44 $—