Commitments and Contingencies - Schedule of Commercial Commitments (Details)
$ in Millions |
Jun. 30, 2025
USD ($)
|
| Other Commitments [Line Items] |
|
| Other Commitment |
$ 733
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
190
|
| Other Commitment, to be Paid, Year One |
64
|
| Other Commitment, to be Paid, Year Two |
6
|
| Other Commitment, to be Paid, Year Three |
161
|
| Other Commitment, to be Paid, Year Four |
4
|
| Other Commitment, to be Paid, Year Five and Beyond |
308
|
| Guarantor Obligations, Maximum Exposure, Undiscounted |
55
|
| Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
56
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
28
|
| Other Commitment, to be Paid, Year One |
28
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
275
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
162
|
| Other Commitment, to be Paid, Year One |
33
|
| Other Commitment, to be Paid, Year Two |
2
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Financing trust guarantees |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
378
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
0
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
300
|
| Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
24
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
3
|
| Other Commitment, to be Paid, Year Two |
4
|
| Other Commitment, to be Paid, Year Three |
5
|
| Other Commitment, to be Paid, Year Four |
4
|
| Other Commitment, to be Paid, Year Five and Beyond |
8
|
| Commonwealth Edison Co |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
255
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
40
|
| Other Commitment, to be Paid, Year One |
13
|
| Other Commitment, to be Paid, Year Two |
2
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
200
|
| Commonwealth Edison Co | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
18
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
10
|
| Other Commitment, to be Paid, Year One |
8
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Commonwealth Edison Co | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
37
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
30
|
| Other Commitment, to be Paid, Year One |
5
|
| Other Commitment, to be Paid, Year Two |
2
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Commonwealth Edison Co | Financing trust guarantees |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
200
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
0
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
200
|
| PECO Energy Co |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
185
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
7
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
100
|
| PECO Energy Co | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
5
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
5
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| PECO Energy Co | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
2
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
2
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| PECO Energy Co | Financing trust guarantees |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
178
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
0
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
100
|
| Baltimore Gas and Electric Company |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
30
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
15
|
| Other Commitment, to be Paid, Year One |
15
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Baltimore Gas and Electric Company | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
27
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
14
|
| Other Commitment, to be Paid, Year One |
13
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Baltimore Gas and Electric Company | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
3
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
1
|
| Other Commitment, to be Paid, Year One |
2
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Pepco Holdings LLC |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
202
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
79
|
| Other Commitment, to be Paid, Year One |
24
|
| Other Commitment, to be Paid, Year Two |
4
|
| Other Commitment, to be Paid, Year Three |
83
|
| Other Commitment, to be Paid, Year Four |
4
|
| Other Commitment, to be Paid, Year Five and Beyond |
8
|
| Guarantor Obligations, Maximum Exposure, Undiscounted |
55
|
| Pepco Holdings LLC | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
4
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
2
|
| Other Commitment, to be Paid, Year One |
2
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Pepco Holdings LLC | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
174
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
77
|
| Other Commitment, to be Paid, Year One |
19
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Pepco Holdings LLC | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
24
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
3
|
| Other Commitment, to be Paid, Year Two |
4
|
| Other Commitment, to be Paid, Year Three |
5
|
| Other Commitment, to be Paid, Year Four |
4
|
| Other Commitment, to be Paid, Year Five and Beyond |
8
|
| Potomac Electric Power Company |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
172
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
73
|
| Other Commitment, to be Paid, Year One |
14
|
| Other Commitment, to be Paid, Year Two |
1
|
| Other Commitment, to be Paid, Year Three |
80
|
| Other Commitment, to be Paid, Year Four |
1
|
| Other Commitment, to be Paid, Year Five and Beyond |
3
|
| Guarantor Obligations, Maximum Exposure, Undiscounted |
17
|
| Potomac Electric Power Company | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
2
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
2
|
| Other Commitment, to be Paid, Year One |
0
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Potomac Electric Power Company | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
162
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
71
|
| Other Commitment, to be Paid, Year One |
13
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
78
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Potomac Electric Power Company | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
8
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
1
|
| Other Commitment, to be Paid, Year Two |
1
|
| Other Commitment, to be Paid, Year Three |
2
|
| Other Commitment, to be Paid, Year Four |
1
|
| Other Commitment, to be Paid, Year Five and Beyond |
3
|
| Delmarva Power and Light Company |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
17
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
3
|
| Other Commitment, to be Paid, Year One |
6
|
| Other Commitment, to be Paid, Year Two |
2
|
| Other Commitment, to be Paid, Year Three |
2
|
| Other Commitment, to be Paid, Year Four |
2
|
| Other Commitment, to be Paid, Year Five and Beyond |
2
|
| Guarantor Obligations, Maximum Exposure, Undiscounted |
21
|
| Delmarva Power and Light Company | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
1
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
1
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Delmarva Power and Light Company | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
7
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
3
|
| Other Commitment, to be Paid, Year One |
4
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Delmarva Power and Light Company | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
9
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
1
|
| Other Commitment, to be Paid, Year Two |
2
|
| Other Commitment, to be Paid, Year Three |
2
|
| Other Commitment, to be Paid, Year Four |
2
|
| Other Commitment, to be Paid, Year Five and Beyond |
2
|
| Atlantic City Electric Company |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
13
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
3
|
| Other Commitment, to be Paid, Year One |
4
|
| Other Commitment, to be Paid, Year Two |
1
|
| Other Commitment, to be Paid, Year Three |
1
|
| Other Commitment, to be Paid, Year Four |
1
|
| Other Commitment, to be Paid, Year Five and Beyond |
3
|
| Guarantor Obligations, Maximum Exposure, Undiscounted |
17
|
| Atlantic City Electric Company | Letters of Credit |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
1
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
1
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Atlantic City Electric Company | Surety Bonds |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
5
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
3
|
| Other Commitment, to be Paid, Year One |
2
|
| Other Commitment, to be Paid, Year Two |
0
|
| Other Commitment, to be Paid, Year Three |
0
|
| Other Commitment, to be Paid, Year Four |
0
|
| Other Commitment, to be Paid, Year Five and Beyond |
0
|
| Atlantic City Electric Company | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Other Commitment |
7
|
| Other Commitment, to be Paid, Remainder of Fiscal Year |
0
|
| Other Commitment, to be Paid, Year One |
1
|
| Other Commitment, to be Paid, Year Two |
1
|
| Other Commitment, to be Paid, Year Three |
1
|
| Other Commitment, to be Paid, Year Four |
1
|
| Other Commitment, to be Paid, Year Five and Beyond |
$ 3
|
| Minimum [Member] | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Lessor, Operating Lease, Term of Contract |
1 year
|
| Maximum [Member] | Guaranteed lease residual values |
|
| Other Commitments [Line Items] |
|
| Lessor, Operating Lease, Term of Contract |
9 years
|