Fair Value of Financial Assets and Liabilities - Fair Value of Financial Liabilities Recorded at the Carrying Amount (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
|
$ 962
|
$ 275
|
Due to Related Parties, Noncurrent |
|
641
|
641
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
1,024
|
1,021
|
Debt Issuance Costs, Net |
|
200
|
180
|
Preferred stock(b) |
|
0
|
193
|
Financing Trust Member [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
7
|
|
Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
1,267
|
536
|
Long-term debt (including amounts due within one year) (a) |
[1] |
34,005
|
25,145
|
Due to Related Parties, Noncurrent |
[2] |
641
|
641
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
1,024
|
1,021
|
Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
1,267
|
536
|
Long-term debt (including amounts due within one year) (a) |
[1] |
34,813
|
25,924
|
Due to Related Parties, Noncurrent |
[2] |
667
|
673
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
732
|
818
|
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
3
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,113
|
931
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
0
|
0
|
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
1,267
|
533
|
Long-term debt (including amounts due within one year) (a) |
[1] |
31,741
|
23,644
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
732
|
818
|
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,959
|
1,349
|
Due to Related Parties, Noncurrent |
[2] |
667
|
673
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
0
|
0
|
Exelon Generation Co L L C [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
|
115
|
127
|
Due to Related Parties, Noncurrent |
|
922
|
933
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
1,024
|
1,021
|
Debt Issuance Costs, Net |
|
64
|
70
|
Exelon Generation Co L L C [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
699
|
29
|
Long-term debt (including amounts due within one year) (a) |
[1] |
9,241
|
8,959
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
1,024
|
1,021
|
Exelon Generation Co L L C [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
699
|
29
|
Long-term debt (including amounts due within one year) (a) |
[1] |
9,152
|
9,116
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
732
|
818
|
Exelon Generation Co L L C [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
0
|
0
|
Exelon Generation Co L L C [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
699
|
29
|
Long-term debt (including amounts due within one year) (a) |
[1] |
7,482
|
7,767
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
732
|
818
|
Exelon Generation Co L L C [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,670
|
1,349
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
0
|
0
|
Commonwealth Edison Co [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Due to Related Parties, Noncurrent |
|
205
|
205
|
Debt Issuance Costs, Net |
|
46
|
38
|
Commonwealth Edison Co [Member] | Financing Trust Member [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
1
|
|
Commonwealth Edison Co [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
294
|
Long-term debt (including amounts due within one year) (a) |
[1] |
7,033
|
6,509
|
Due to Related Parties, Noncurrent |
[2] |
205
|
205
|
Commonwealth Edison Co [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
294
|
Long-term debt (including amounts due within one year) (a) |
[1] |
7,585
|
7,069
|
Due to Related Parties, Noncurrent |
[2] |
215
|
213
|
Commonwealth Edison Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Commonwealth Edison Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
294
|
Long-term debt (including amounts due within one year) (a) |
[1] |
7,585
|
7,069
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Commonwealth Edison Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
[2] |
215
|
213
|
PECO Energy Co [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Due to Related Parties, Noncurrent |
|
184
|
184
|
Debt Issuance Costs, Net |
|
15
|
15
|
PECO Energy Co [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,580
|
2,580
|
Due to Related Parties, Noncurrent |
|
184
|
184
|
PECO Energy Co [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,794
|
2,786
|
Due to Related Parties, Noncurrent |
|
192
|
195
|
PECO Energy Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
|
0
|
0
|
PECO Energy Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,794
|
2,786
|
Due to Related Parties, Noncurrent |
|
0
|
0
|
PECO Energy Co [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
|
192
|
195
|
Baltimore Gas and Electric Company [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Due to Related Parties, Noncurrent |
|
252
|
252
|
Debt Issuance Costs, Net |
|
15
|
9
|
Preferred stock(b) |
|
0
|
190
|
Baltimore Gas and Electric Company [Member] | Financing Trust Member [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
6
|
|
Baltimore Gas and Electric Company [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
45
|
213
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,322
|
1,858
|
Due to Related Parties, Noncurrent |
[2] |
252
|
252
|
Baltimore Gas and Electric Company [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
45
|
213
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,467
|
2,044
|
Due to Related Parties, Noncurrent |
[2] |
260
|
264
|
Baltimore Gas and Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
3
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Baltimore Gas and Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
45
|
210
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,467
|
2,044
|
Due to Related Parties, Noncurrent |
[2] |
0
|
0
|
Baltimore Gas and Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Due to Related Parties, Noncurrent |
[2] |
260
|
264
|
Pepco Holdings LLC [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Long-term debt (including amounts due within one year) (a) |
|
742
|
0
|
Debt Issuance Costs, Net |
|
|
49
|
Pepco Holdings LLC [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Preferred stock(b) |
|
0
|
|
Pepco Holdings LLC [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Preferred stock(b) |
[3] |
|
183
|
Pepco Holdings LLC [Member] | Reported Value Measurement [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
522
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
5,898
|
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
|
183
|
Pepco Holdings LLC [Member] | Reported Value Measurement [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
958
|
Long-term debt (including amounts due within one year) (a) |
[1] |
|
5,279
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
522
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
5,809
|
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
|
183
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
958
|
Long-term debt (including amounts due within one year) (a) |
[1] |
|
5,817
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
|
0
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
|
0
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
522
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
5,520
|
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
|
0
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
958
|
Long-term debt (including amounts due within one year) (a) |
[1] |
|
5,231
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
|
Long-term debt (including amounts due within one year) (a) |
[1] |
289
|
|
Spent Nuclear Fuel Obligation, Noncurrent |
|
|
183
|
Pepco Holdings LLC [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Predecessor [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
|
586
|
Potomac Electric Power Company [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
30
|
31
|
Potomac Electric Power Company [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
23
|
64
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,349
|
2,351
|
Potomac Electric Power Company [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
23
|
64
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,796
|
2,673
|
Potomac Electric Power Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Potomac Electric Power Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
23
|
64
|
Long-term debt (including amounts due within one year) (a) |
[1] |
2,788
|
2,673
|
Potomac Electric Power Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
0
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
8
|
0
|
Delmarva Power and Light Company [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
11
|
10
|
Delmarva Power and Light Company [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
105
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,340
|
1,265
|
Delmarva Power and Light Company [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
105
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,383
|
1,288
|
Delmarva Power and Light Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Delmarva Power and Light Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
105
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,383
|
1,185
|
Delmarva Power and Light Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
103
|
Atlantic City Electric Company [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Debt Issuance Costs, Net |
|
6
|
6
|
Atlantic City Electric Company [Member] | Reported Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
5
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,155
|
1,201
|
Atlantic City Electric Company [Member] | Estimate of Fair Value Measurement [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
5
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,287
|
1,324
|
Atlantic City Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
0
|
0
|
Atlantic City Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
5
|
Long-term debt (including amounts due within one year) (a) |
[1] |
1,007
|
1,044
|
Atlantic City Electric Company [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
Short-term Debt, Fair Value |
|
|
0
|
Long-term debt (including amounts due within one year) (a) |
[1] |
$ 280
|
$ 280
|
|
|