Related Party Transactions - Related Party Transactions included in Consolidated Income Statement (Details) - USD ($) $ in Millions |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Mar. 23, 2016 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
$ 10
|
|
$ 9
|
$ 23
|
Interest Expense, Related Party |
|
|
|
|
41
|
|
41
|
41
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
|
|
|
|
0
|
|
0
|
(20)
|
Income (Loss) from Equity Method Investments |
|
|
|
|
(24)
|
|
(7)
|
0
|
Cash dividends paid to parent |
|
|
|
|
1,166
|
|
1,105
|
1,065
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
|
|
0
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
0
|
|
0
|
531
|
Other Cost and Expense, Operating |
|
|
|
|
10,048
|
|
8,322
|
8,568
|
PECO Energy Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[1] |
|
|
|
1
|
|
1
|
1
|
Constellation Energy Nuclear Group Llc Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[2] |
|
|
|
0
|
|
0
|
17
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
[2] |
|
|
|
0
|
|
0
|
(19)
|
Utilities Operating Expense, Purchased Power |
[3] |
|
|
|
0
|
|
0
|
282
|
Baltimore Gas and Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[1] |
|
|
|
4
|
|
4
|
5
|
Keystone Fuels LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[4] |
|
|
|
0
|
|
0
|
138
|
Conemaugh Fuels LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[4] |
|
|
|
0
|
|
0
|
99
|
SafeHarborWaterPowerCorp [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[4] |
|
|
|
0
|
|
0
|
12
|
PECO Trust Three Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
6
|
|
6
|
6
|
ComEd Financing Three Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
13
|
|
13
|
13
|
PECO Trust Four Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
6
|
|
6
|
6
|
BGE Capital Trust II [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
16
|
|
16
|
16
|
Other Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
5
|
|
4
|
0
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
|
|
|
|
1
|
|
1
|
0
|
Qualifying Facilities And Domestic Power Projects Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
|
|
|
|
(25)
|
|
(8)
|
(1)
|
Commonwealth Edison Co [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
15
|
|
4
|
4
|
Operating and maintenance from affiliates |
|
|
|
|
227
|
|
195
|
166
|
Interest Expense, Related Party |
|
|
|
|
13
|
|
13
|
13
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
369
|
|
299
|
307
|
Contributions from parent |
|
|
|
|
315
|
|
202
|
273
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
315
|
|
202
|
273
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
1,411
|
|
1,301
|
1,001
|
Other Cost and Expense, Operating |
|
|
|
|
1,303
|
|
1,372
|
1,263
|
Commonwealth Edison Co [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
7
|
|
4
|
4
|
Utilities Operating Expense, Purchased Power |
[5] |
|
|
|
47
|
|
18
|
176
|
Commonwealth Edison Co [Member] | PECO Energy Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
[6] |
|
|
|
1
|
|
|
|
Commonwealth Edison Co [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
|
369
|
|
299
|
307
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
315
|
|
202
|
273
|
Commonwealth Edison Co [Member] | Baltimore Gas and Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
Commonwealth Edison Co [Member] | ComEd Financing Three Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
13
|
|
13
|
13
|
Commonwealth Edison Co [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
6
|
|
|
|
Operating and maintenance from affiliates |
[6] |
|
|
|
225
|
|
195
|
166
|
Related Party Transaction Capitalized Costs Support Services |
[6] |
|
|
|
112
|
|
103
|
77
|
Atlantic City Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
3
|
|
4
|
4
|
Operating and maintenance from affiliates |
|
|
|
|
18
|
|
3
|
3
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
63
|
|
12
|
26
|
Contributions from parent |
|
|
|
|
139
|
|
95
|
0
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
139
|
|
95
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
614
|
|
708
|
664
|
Other Cost and Expense, Operating |
|
|
|
|
410
|
|
268
|
247
|
Atlantic City Electric Company [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[7] |
|
|
|
37
|
|
0
|
0
|
Atlantic City Electric Company [Member] | PHI Service Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
2
|
|
2
|
1
|
Other Cost and Expense, Operating |
|
|
|
|
155
|
|
143
|
124
|
Atlantic City Electric Company [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Contribution from member |
|
|
|
|
139
|
|
95
|
0
|
Cash dividends paid to parent |
|
|
|
|
63
|
|
12
|
26
|
Atlantic City Electric Company [Member] | Other Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
2
|
3
|
Operating and maintenance from affiliates |
|
|
|
|
3
|
|
3
|
3
|
Atlantic City Electric Company [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating and maintenance from affiliates |
[8] |
|
|
|
15
|
|
0
|
0
|
Baltimore Gas and Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
21
|
|
14
|
25
|
Operating and maintenance from affiliates |
|
|
|
|
132
|
|
118
|
103
|
Interest Expense, Related Party |
|
|
|
|
16
|
|
16
|
16
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
179
|
|
158
|
0
|
Contributions from parent |
|
|
|
|
61
|
|
7
|
0
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
61
|
|
7
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
528
|
|
602
|
733
|
Other Cost and Expense, Operating |
|
|
|
|
605
|
|
565
|
614
|
Baltimore Gas and Electric Company [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[9] |
|
|
|
13
|
|
14
|
25
|
Utilities Operating Expense, Purchased Power |
[10] |
|
|
|
604
|
|
498
|
382
|
Baltimore Gas and Electric Company [Member] | Commonwealth Edison Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
0
|
|
Baltimore Gas and Electric Company [Member] | PECO Energy Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
Baltimore Gas and Electric Company [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
|
179
|
|
158
|
0
|
Contributions from parent |
|
|
|
|
61
|
|
7
|
0
|
Baltimore Gas and Electric Company [Member] | BGE Capital Trust II [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
16
|
|
16
|
16
|
Baltimore Gas and Electric Company [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
6
|
|
|
|
Operating and maintenance from affiliates |
[11] |
|
|
|
130
|
|
118
|
103
|
Related Party Transaction Capitalized Costs Support Services |
[11] |
|
|
|
36
|
|
28
|
19
|
PECO Energy Co [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
8
|
|
2
|
2
|
Operating and maintenance from affiliates |
|
|
|
|
146
|
|
110
|
99
|
Interest Expense, Related Party |
|
|
|
|
12
|
|
12
|
12
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
277
|
|
279
|
320
|
Contributions from parent |
|
|
|
|
18
|
|
16
|
24
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
598
|
|
735
|
740
|
Other Cost and Expense, Operating |
|
|
|
|
665
|
|
684
|
767
|
PECO Energy Co [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[12] |
|
|
|
3
|
|
2
|
2
|
Operating and maintenance from affiliates |
|
|
|
|
2
|
|
3
|
3
|
Utilities Operating Expense, Purchased Power |
[13] |
|
|
|
287
|
|
220
|
194
|
PECO Energy Co [Member] | Commonwealth Edison Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
PECO Energy Co [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
|
277
|
|
279
|
320
|
Contributions from parent |
|
|
|
|
18
|
|
16
|
24
|
PECO Energy Co [Member] | Baltimore Gas and Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
PECO Energy Co [Member] | PECO Trust Three Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
6
|
|
6
|
6
|
PECO Energy Co [Member] | PECO Trust Four Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
6
|
|
6
|
6
|
PECO Energy Co [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
3
|
|
|
|
Operating and maintenance from affiliates |
[14] |
|
|
|
142
|
|
107
|
96
|
Related Party Transaction Capitalized Costs Support Services |
[14] |
|
|
|
57
|
|
40
|
39
|
Pepco Holdings LLC [Member] | Predecessor [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
$ 0
|
|
|
|
|
0
|
0
|
Operating and maintenance from affiliates |
|
0
|
|
|
|
|
0
|
0
|
Income (Loss) from Equity Method Investments |
|
0
|
|
|
|
|
0
|
|
Cash distribution paid to member |
|
0
|
|
|
|
|
0
|
0
|
Cash dividends paid to parent |
|
0
|
|
|
|
|
275
|
272
|
Utilities Operating Expense, Purchased Power |
|
471
|
|
|
|
|
1,986
|
1,940
|
Other Cost and Expense, Operating |
|
$ 294
|
|
|
|
|
1,156
|
1,183
|
Pepco Holdings LLC [Member] | Successor [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
$ 45
|
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
89
|
|
|
|
|
Income (Loss) from Equity Method Investments |
|
|
|
0
|
|
|
|
|
Cash distribution paid to member |
|
|
|
273
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
0
|
|
|
|
|
Contributions from parent |
|
|
|
1,251
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
925
|
|
|
|
|
Other Cost and Expense, Operating |
|
|
|
1,144
|
|
|
|
|
Pepco Holdings LLC [Member] | Exelon Generation Co LLC Affiliate [Member] | Successor [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
1
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
486
|
|
|
|
|
Pepco Holdings LLC [Member] | PHI Service Co Affiliate [Member] | Successor [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
3
|
|
|
|
|
Contributions from parent |
|
|
|
1,251
|
|
|
|
|
Pepco Holdings LLC [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
273
|
|
|
|
|
Pepco Holdings LLC [Member] | Exelon Business Services Co Affiliate [Member] | Successor [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
44
|
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
$ 86
|
|
|
|
|
Potomac Electric Power Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
5
|
|
5
|
5
|
Operating and maintenance from affiliates |
|
|
|
|
35
|
|
4
|
4
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
136
|
|
146
|
86
|
Contributions from parent |
|
|
|
|
187
|
|
112
|
80
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
187
|
|
112
|
80
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
411
|
|
719
|
735
|
Other Cost and Expense, Operating |
|
|
|
|
607
|
|
435
|
386
|
Potomac Electric Power Company [Member] | Corporate, Non-Segment [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Other Cost and Expense, Operating |
|
|
|
|
302
|
|
266
|
250
|
Potomac Electric Power Company [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1
|
[15] |
0
|
0
|
Utilities Operating Expense, Purchased Power |
[16] |
|
|
|
295
|
|
0
|
0
|
Potomac Electric Power Company [Member] | PHI Service Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
4
|
|
5
|
5
|
Operating and maintenance from affiliates |
[17] |
|
|
|
4
|
|
4
|
4
|
Other Cost and Expense, Operating |
|
|
|
|
263
|
|
240
|
220
|
Potomac Electric Power Company [Member] | Pepco Energy Services Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Other Cost and Expense, Operating |
|
|
|
|
39
|
|
26
|
30
|
Potomac Electric Power Company [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
|
136
|
|
146
|
86
|
Contributions from parent |
|
|
|
|
187
|
|
112
|
80
|
Potomac Electric Power Company [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating and maintenance from affiliates |
[17] |
|
|
|
31
|
|
0
|
0
|
Delmarva Power and Light Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
7
|
|
6
|
7
|
Operating and maintenance from affiliates |
|
|
|
|
19
|
|
1
|
1
|
Income (Loss) from Equity Method Investments |
|
|
|
|
0
|
|
0
|
|
Cash dividends paid to parent |
|
|
|
|
54
|
|
92
|
100
|
Contributions from parent |
|
|
|
|
152
|
|
75
|
130
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
152
|
|
75
|
130
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
369
|
|
555
|
536
|
Other Cost and Expense, Operating |
|
|
|
|
422
|
|
303
|
266
|
Delmarva Power and Light Company [Member] | Corporate, Non-Segment [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Other Cost and Expense, Operating |
|
|
|
|
202
|
|
182
|
163
|
Delmarva Power and Light Company [Member] | Exelon Generation Co LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[18] |
|
|
|
154
|
|
0
|
0
|
Delmarva Power and Light Company [Member] | PHI Service Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
5
|
|
5
|
6
|
Operating and maintenance from affiliates |
[19] |
|
|
|
1
|
|
1
|
1
|
Other Cost and Expense, Operating |
|
|
|
|
194
|
|
179
|
163
|
Delmarva Power and Light Company [Member] | Pepco Energy Services Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Other Cost and Expense, Operating |
|
|
|
|
8
|
|
3
|
0
|
Delmarva Power and Light Company [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Cash dividends paid to parent |
|
|
|
|
54
|
|
92
|
100
|
Contributions from parent |
|
|
|
|
152
|
|
75
|
130
|
Delmarva Power and Light Company [Member] | Other Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
2
|
|
1
|
1
|
Delmarva Power and Light Company [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating and maintenance from affiliates |
[19] |
|
|
|
18
|
|
0
|
0
|
Exelon Generation Co L L C [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
1,439
|
|
749
|
779
|
Operating and maintenance from affiliates |
|
|
|
|
663
|
|
620
|
623
|
Interest Expense, Related Party |
|
|
|
|
39
|
|
43
|
53
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
|
|
|
|
(25)
|
|
(8)
|
0
|
Income (Loss) from Equity Method Investments |
|
|
$ 19
|
|
0
|
|
0
|
(20)
|
Cash distribution paid to member |
|
|
|
|
922
|
|
2,474
|
645
|
Contribution from member |
|
|
|
|
142
|
|
47
|
53
|
Adjustments to Additional Paid in Capital, Other |
|
|
|
|
|
|
|
170
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
12
|
|
14
|
557
|
Other Cost and Expense, Operating |
|
|
|
|
4,978
|
|
4,688
|
4,943
|
Exelon Generation Co L L C [Member] | Commonwealth Edison Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[20] |
|
|
|
47
|
|
18
|
176
|
Operating and maintenance from affiliates |
[21] |
|
|
|
7
|
|
4
|
3
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
0
|
|
0
|
1
|
Exelon Generation Co L L C [Member] | PECO Energy Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[22] |
|
|
|
290
|
|
224
|
198
|
Operating and maintenance from affiliates |
[21] |
|
|
|
3
|
|
2
|
2
|
Exelon Generation Co L L C [Member] | Baltimore Gas And Electric Company Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[23] |
|
|
|
608
|
|
502
|
387
|
Operating and maintenance from affiliates |
[21] |
|
|
|
1
|
|
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
12
|
|
14
|
25
|
Exelon Generation Co L L C [Member] | Constellation Energy Nuclear Group Llc Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[24] |
|
|
|
0
|
|
0
|
17
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
[24] |
|
|
|
0
|
|
0
|
(19)
|
Utilities Operating Expense, Purchased Power |
[25] |
|
|
|
0
|
|
0
|
282
|
Exelon Generation Co L L C [Member] | Exelon Corporation Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Interest Expense, Related Party |
|
|
|
|
39
|
|
43
|
53
|
Cash distribution paid to member |
|
|
|
|
922
|
|
2,474
|
645
|
Contribution from member |
|
|
|
|
142
|
|
47
|
53
|
Exelon Generation Co L L C [Member] | Keystone Fuels LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[26] |
|
|
|
0
|
|
0
|
138
|
Exelon Generation Co L L C [Member] | Conemaugh Fuels LLC Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
[26] |
|
|
|
0
|
|
0
|
99
|
Exelon Generation Co L L C [Member] | SafeHarborWaterPowerCorp [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Utilities Operating Expense, Purchased Power |
|
|
|
|
0
|
|
0
|
12
|
Exelon Generation Co L L C [Member] | Other Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
6
|
|
4
|
0
|
Exelon Generation Co L L C [Member] | Qualifying Facilities And Domestic Power Projects Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |
|
|
|
|
(25)
|
|
(8)
|
(1)
|
Exelon Generation Co L L C [Member] | Pepco Holdings LLC [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
Exelon Generation Co L L C [Member] | Potomac Electric Power Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[23] |
|
|
|
295
|
|
|
|
Operating and maintenance from affiliates |
|
|
|
|
1
|
|
|
|
Exelon Generation Co L L C [Member] | Delmarva Power and Light Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[23] |
|
|
|
154
|
|
|
|
Exelon Generation Co L L C [Member] | Atlantic City Electric Company [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
[23] |
|
|
|
37
|
|
|
|
Exelon Generation Co L L C [Member] | Exelon Business Services Co Affiliate [Member] |
|
|
|
|
|
|
|
|
Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
Operating revenues from affiliates |
|
|
|
|
2
|
|
1
|
1
|
Operating and maintenance from affiliates |
[27] |
|
|
|
650
|
|
614
|
618
|
Related Party Transaction Capitalized Costs Support Services |
[6] |
|
|
|
$ 98
|
|
$ 76
|
$ 91
|
|
|