v3.23.1
Supplemental Financial Information - Cash Flow (Details) - USD ($)
$ in Millions |
3 Months Ended |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
$ 680
|
$ 726
|
Amortization of regulatory assets |
178
|
179
|
Amortization of intangible assets, net |
2
|
6
|
Amortization of energy contract assets and liabilities |
|
3
|
Nuclear fuel |
|
66
|
ARO accretion |
|
44
|
Depreciation, Amortization and Accretion, Net |
860
|
1,024
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
45
|
44
|
Allowance for credit losses |
70
|
78
|
Other decommissioning-related activity |
|
36
|
Energy-related options |
|
60
|
True-up adjustments to decoupling mechanisms and formula rates |
279
|
29
|
Long-term incentive plan |
2
|
25
|
Amortization of operating ROU asset |
10
|
23
|
AFUDC - Equity |
(38)
|
(36)
|
Change in environmental liabilities |
25
|
|
Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(282)
|
(29)
|
Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(38)
|
(36)
|
Commonwealth Edison Co [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
267
|
254
|
Amortization of regulatory assets |
71
|
67
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
338
|
321
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
6
|
16
|
Allowance for credit losses |
0
|
17
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
153
|
40
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
1
|
1
|
AFUDC - Equity |
(10)
|
(8)
|
Change in environmental liabilities |
0
|
|
Commonwealth Edison Co [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(153)
|
(40)
|
Commonwealth Edison Co [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(10)
|
(8)
|
PECO Energy Co [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
95
|
88
|
Amortization of regulatory assets |
3
|
4
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
98
|
92
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
(3)
|
(2)
|
Allowance for credit losses |
37
|
27
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
(4)
|
6
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
0
|
0
|
AFUDC - Equity |
(6)
|
(7)
|
Change in environmental liabilities |
0
|
|
PECO Energy Co [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
4
|
(6)
|
PECO Energy Co [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(6)
|
(7)
|
Baltimore Gas and Electric Company [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
124
|
117
|
Amortization of regulatory assets |
43
|
54
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
167
|
171
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
14
|
12
|
Allowance for credit losses |
18
|
18
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
65
|
(12)
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
1
|
7
|
AFUDC - Equity |
(3)
|
(6)
|
Change in environmental liabilities |
0
|
|
Baltimore Gas and Electric Company [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(65)
|
12
|
Baltimore Gas and Electric Company [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(3)
|
(6)
|
Pepco Holdings LLC [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
180
|
164
|
Amortization of regulatory assets |
61
|
54
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
241
|
218
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
24
|
13
|
Allowance for credit losses |
15
|
18
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
65
|
(5)
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
7
|
7
|
AFUDC - Equity |
(19)
|
(15)
|
Change in environmental liabilities |
25
|
|
Pepco Holdings LLC [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(68)
|
5
|
Pepco Holdings LLC [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(19)
|
(15)
|
Potomac Electric Power Company [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
76
|
72
|
Amortization of regulatory assets |
32
|
36
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
108
|
108
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
8
|
2
|
Allowance for credit losses |
7
|
9
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
39
|
(7)
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
1
|
2
|
AFUDC - Equity |
(14)
|
(11)
|
Change in environmental liabilities |
25
|
|
Potomac Electric Power Company [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(39)
|
7
|
Potomac Electric Power Company [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(14)
|
(11)
|
Delmarva Power and Light Company [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
51
|
45
|
Amortization of regulatory assets |
9
|
12
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
60
|
57
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
4
|
1
|
Allowance for credit losses |
5
|
6
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
9
|
(1)
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
2
|
2
|
AFUDC - Equity |
(2)
|
(2)
|
Change in environmental liabilities |
0
|
|
Delmarva Power and Light Company [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(11)
|
1
|
Delmarva Power and Light Company [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
(2)
|
(2)
|
Atlantic City Electric Company [Member] |
|
|
Depreciation, Amortization and Accretion [Abstract] |
|
|
Property, plant and equipment |
47
|
41
|
Amortization of regulatory assets |
20
|
6
|
Amortization of intangible assets, net |
0
|
0
|
Amortization of energy contract assets and liabilities |
|
0
|
Nuclear fuel |
|
0
|
ARO accretion |
|
0
|
Depreciation, Amortization and Accretion, Net |
67
|
47
|
Other Non-Cash Operating Activities [Abstract] |
|
|
Pension and non-pension postretirement benefit costs |
4
|
3
|
Allowance for credit losses |
3
|
3
|
Other decommissioning-related activity |
|
0
|
Energy-related options |
|
0
|
True-up adjustments to decoupling mechanisms and formula rates |
17
|
3
|
Long-term incentive plan |
0
|
0
|
Amortization of operating ROU asset |
1
|
1
|
AFUDC - Equity |
(3)
|
(2)
|
Change in environmental liabilities |
0
|
|
Atlantic City Electric Company [Member] | Other Non-Cash Activity |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
True-up adjustments to decoupling mechanisms and formula rates |
(18)
|
(3)
|
Atlantic City Electric Company [Member] | Return on borrowed funds |
|
|
Other Non-Cash Operating Activities [Abstract] |
|
|
AFUDC - Equity |
$ (3)
|
$ (2)
|
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