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Regulatory Matters (Tables)
3 Months Ended
Mar. 31, 2018
Regulated Operations [Abstract]  
Public Utilities General Disclosures [Table Text Block]
The following table illustrates our authorized amounts capitalized for ratemaking purposes related to earnings on shareholders’ investment that are not recognized for financial reporting purposes on our Consolidated Balance Sheets. These amounts will be recognized as revenues in our Consolidated Statements of Operations and Comprehensive Income in the periods they are billable to our customers.
 
Exelon
 
ComEd(a)
 
PECO
 
BGE(b)
 
PHI
 
Pepco(c)
 
DPL(c)
 
ACE
March 31, 2018
$
69

 
$
7

 
$

 
$
52

 
$
10

 
$
6

 
$
4

 
$

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exelon
 
ComEd(a)
 
PECO
 
BGE(b)
 
PHI
 
Pepco(c)
 
DPL(c)
 
ACE
December 31, 2017
$
69

 
$
6

 
$

 
$
53

 
$
10

 
$
6

 
$
4

 
$

_________
(a)
Reflects ComEd's unrecognized equity returns earned for ratemaking purposes on its electric distribution formula rate regulatory assets.
(b)
BGE's authorized amounts capitalized for ratemaking purposes primarily relate to earnings on shareholders' investment on its AMI programs.
(c)
Pepco's and DPL's authorized amounts capitalized for ratemaking purposes relate to earnings on shareholders' investment on their respective AMI Programs and Energy Efficiency and Demand Response Programs. The earnings on energy efficiency are on Pepco DC and DPL DE programs only.
 
 
 
 
 
 
 
 
 
 

Schedule of Regulatory Assets
he following tables provide information about the regulatory assets and liabilities of Exelon, ComEd, PECO, BGE, PHI, Pepco, DPL and ACE as of March 31, 2018 and December 31, 2017. For additional information on the specific regulatory assets and liabilities, refer to Note 3Regulatory Matters of the Exelon 2017 Form 10-K.
March 31, 2018
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and other postretirement benefits(a)
$
3,844

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes
336

 

 
327

 

 
9

 
9

 

 

AMI programs(c)
621

 
151

 
33

 
208

 
229

 
154

 
75

 

Electric distribution formula rate(d)
256

 
256

 

 

 

 

 

 

Energy efficiency costs
220

 
220

 

 

 

 

 

 

Debt costs
108

 
36

 
1

 
11

 
71

 
15

 
7

 
5

Fair value of long-term debt
745

 

 

 

 
607

 

 

 

Fair value of PHI's unamortized energy contracts
701

 

 

 

 
701

 

 

 

Asset retirement obligations
111

 
75

 
22

 
14

 

 

 

 

MGP remediation costs
284

 
263

 
21

 

 

 

 

 

Under-recovered uncollectible accounts
69

 
69

 

 

 

 

 

 

Renewable energy
268

 
267

 

 

 
1

 

 

 
1

Energy and transmission programs(e)(f)(g)(h)(i)(j)
117

 
8

 
43

 
21

 
45

 
7

 
14

 
24

Deferred storm costs
46

 

 

 

 
46

 
12

 
5

 
29

Energy efficiency and demand response programs
559

 

 
1

 
269

 
289

 
212

 
77

 

Merger integration costs(k)(l)(m)
46

 

 

 
5

 
41

 
20

 
11

 
10

Under-recovered revenue decoupling(n)
44

 

 

 
6

 
38

 
38

 

 

COPCO acquisition adjustment
5

 

 

 

 
5

 

 
5

 

Workers compensation and long-term disability costs
33

 

 

 

 
33

 
33

 

 

Vacation accrual
27

 

 
14

 

 
13

 

 
8

 
5

Securitized stranded costs
71

 

 

 

 
71

 

 

 
71

CAP arrearage
12

 

 
12

 

 

 

 

 

Removal costs
535

 

 

 

 
535

 
150

 
94

 
292

DC PLUG charge
187

 

 

 

 
187

 
187

 

 

Other
63

 
6

 
12

 
6

 
39

 
26

 
9

 
4

Total regulatory assets
9,308

 
1,351

 
486

 
540

 
2,960

 
863

 
305

 
441

Less: current portion
1,245

 
226

 
78

 
149

 
507

 
207

 
63

 
64

Total noncurrent regulatory assets
$
8,063

 
$
1,125

 
$
408

 
$
391

 
$
2,453

 
$
656

 
$
242

 
$
377

March 31, 2018
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other postretirement benefits
$
26

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes(b)
5,189

 
2,458

 

 
1,011

 
1,720

 
804

 
506

 
410

Nuclear decommissioning
2,969

 
2,464

 
505

 

 

 

 

 

Removal costs
1,570

 
1,348

 

 
92

 
130

 
20

 
110

 

Deferred rent
35

 

 

 

 
35

 

 

 

Energy efficiency and demand response programs
16

 
4

 
11

 

 
1

 

 

 
1

DLC program costs
7

 

 
7

 

 

 

 

 

Electric distribution tax repairs
27

 

 
27

 

 

 

 

 

Gas distribution tax repairs
8

 

 
8

 

 

 

 

 

Energy and transmission programs(e)(f)(g)(h)(i)(j)
153

 
53

 
56

 
22

 
22

 
4

 
6

 
12

Over-recovered revenue decoupling(n)
14

 

 

 
11

 
3

 

 
3

 

Renewable portfolio standards costs
81

 
81

 

 

 

 

 

 

Zero emission credit costs
8

 
8

 

 

 

 

 

 

Over-recovered uncollectible accounts
4

 

 

 

 
4

 

 

 
4

Merger integration costs(l)
1

 

 

 

 
1

 

 
1

 

TCJA income tax benefit over-recoveries(o)
54

 

 
10

 
17

 
27

 
14

 
7

 
6

Other
84

 
8

 
22

 
32

 
22

 
3

 
13

 
4

Total regulatory liabilities
10,246

 
6,424

 
646

 
1,185

 
1,965

 
845

 
646

 
437

Less: current portion
522

 
212

 
117

 
102

 
77

 
7

 
48

 
21

Total noncurrent regulatory liabilities
$
9,724

 
$
6,212

 
$
529

 
$
1,083

 
$
1,888

 
$
838

 
$
598

 
$
416


December 31, 2017
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and other postretirement benefits(a)
$
3,848

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes
306

 

 
297

 

 
9

 
9

 

 

AMI programs(c)
640

 
155

 
36

 
214

 
235

 
158

 
77

 

Electric distribution formula rate(d)
244

 
244

 

 

 

 

 

 

Energy efficiency costs
166

 
166

 

 

 

 

 

 

Debt costs
116

 
37

 
1

 
11

 
73

 
15

 
8

 
5

Fair value of long-term debt
758

 

 

 

 
619

 

 

 

Fair value of PHI's unamortized energy contracts
750

 

 

 

 
750

 

 

 

Asset retirement obligations
109

 
73

 
22

 
14

 

 

 

 

MGP remediation costs
295

 
273

 
22

 

 

 

 

 

Under-recovered uncollectible accounts
61

 
61

 

 

 

 

 

 

Renewable energy
258

 
256

 

 

 
2

 

 
1

 
1

Energy and transmission programs(e)(g)(h)(i)(j)
82

 
6

 
1

 
23

 
52

 
11

 
15

 
26

Deferred storm costs
27

 

 

 

 
27

 
7

 
5

 
15

Energy efficiency and demand response programs
596

 

 
1

 
285

 
310

 
229

 
81

 

Merger integration costs(k)(l)(m)
45

 

 

 
6

 
39

 
20

 
10

 
9

Under-recovered revenue decoupling(n)
55

 

 

 
14

 
41

 
38

 
3

 

COPCO acquisition adjustment
5

 

 

 

 
5

 

 
5

 

Workers compensation and long-term disability costs
35

 

 

 

 
35

 
35

 

 

Vacation accrual
19

 

 
6

 

 
13

 

 
8

 
5

Securitized stranded costs
79

 

 

 

 
79

 

 

 
79

CAP arrearage
8

 

 
8

 

 

 

 

 

Removal costs
529

 

 

 

 
529

 
150

 
93

 
286

DC PLUG charge
190

 

 

 

 
190

 
190

 

 

Other
67

 
8

 
16

 
4

 
39

 
29

 
8

 
4

Total regulatory assets
9,288

 
1,279

 
410

 
571

 
3,047

 
891

 
314

 
430

Less: current portion
1,267

 
225

 
29

 
174

 
554

 
213

 
69

 
71

Total noncurrent regulatory assets
$
8,021

 
$
1,054

 
$
381

 
$
397

 
$
2,493

 
$
678

 
$
245

 
$
359

December 31, 2017
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other postretirement benefits
$
30

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes(b)
5,241

 
2,479

 

 
1,032

 
1,730

 
809

 
510

 
411

Nuclear decommissioning
3,064

 
2,528

 
536

 

 

 

 

 

Removal costs
1,573

 
1,338

 

 
105

 
130

 
20

 
110

 

Deferred rent
36

 

 

 

 
36

 

 

 

Energy efficiency and demand response programs
23

 
4

 
19

 

 

 

 

 

DLC program costs
7

 

 
7

 

 

 

 

 

Electric distribution tax repairs
35

 

 
35

 

 

 

 

 

Gas distribution tax repairs
9

 

 
9

 

 

 

 

 

Energy and transmission programs(e)(f)(i)(j)
111

 
47

 
60

 

 
4

 

 
1

 
3

Renewable portfolio standard costs
63

 
63

 

 

 

 

 

 

Zero emission credit costs
112

 
112

 

 

 

 

 

 

Over-recovered uncollectible accounts
2

 

 

 

 
2

 

 

 
2

Other
82

 
6

 
24

 
26

 
26

 
3

 
14

 
6

Total regulatory liabilities
10,388

 
6,577

 
690

 
1,163

 
1,928

 
832

 
635

 
422

Less: current portion
523

 
249

 
141

 
62

 
56

 
3

 
42

 
11

Total noncurrent regulatory liabilities
$
9,865

 
$
6,328

 
$
549

 
$
1,101

 
$
1,872

 
$
829

 
$
593

 
$
411

_________
(a)
Includes regulatory regulatory assets established at the Constellation and PHI merger dates of $427 million and $934 million, respectively, as of March 31, 2018 and $440 million and $953 million, respectively, as of December 31, 2017 related to the rate regulated portions of the deferred costs associated with legacy Constellation’s and PHI’s pension and other postretirement benefit plans that are being amortized and recovered over approximately 12 years and 3 to 15 years, respectively (as established at the respective acquisition dates). The Utility Registrants are not earning or paying a return on these amounts.
(b)
As of March 31, 2018, includes transmission-related income tax regulatory liabilities that require FERC approval separate from the transmission formula rate of $479 million, $135 million, $146 million, $147 million and $147 million for ComEd, BGE, Pepco, DPL and ACE, respectively. As of December 31, 2017, includes transmission-related income tax regulatory liabilities that require FERC approval separate from the transmission formula rate of $484 million, $137 million, $147 million, $148 million and $147 million for ComEd, BGE, Pepco, DPL and ACE, respectively.
(c)
As of March 31, 2018, BGE's regulatory asset of $208 million includes $125 million of unamortized incremental deployment costs under the program, $51 million of unamortized costs of the non-AMI meters replaced under the AMI program, and $32 million related to post-test year incremental program deployment costs incurred prior to approval became effective June 2016. As of December 31, 2017, BGE's regulatory asset of $214 million includes $129 million of unamortized incremental deployment costs under the program, $53 million of unamortized costs of the non-AMI meters replaced under the AMI program, and $32 million related to post-test year incremental program deployment costs incurred prior to approval became effective June 2016. Recovery of the post-test year incremental deployment costs will be addressed in a future base rate proceeding.
(d)
As of March 31, 2018, ComEd’s regulatory asset of $256 million was comprised of $195 million for the 2016, 2017 and 2018 annual reconciliations and $61 million related to significant one-time events. As of December 31, 2017, ComEd’s regulatory asset of $244 million was comprised of $186 million for the 2016 and 2017 annual reconciliations and $58 million related to significant one-time events.
(e)
As of March 31, 2018, ComEd’s regulatory asset of $8 million represents transmission costs recoverable through its FERC approved formula rate. As of March 31, 2018, ComEd’s regulatory liability of $53 million included $21 million related to over-recovered energy costs and $32 million associated with revenues received for renewable energy requirements. As of December 31, 2017, ComEd’s regulatory asset of $6 million represents transmission costs recoverable through its FERC approved formula rate. As of December 31, 2017, ComEd’s regulatory liability of $47 million included $14 million related to over-recovered energy costs and $33 million associated with revenues received for renewable energy requirements.
(f)
As of March 31, 2018, PECO's regulatory liability of $56 million included $44 million related to over-recovered costs under the DSP program, $3 million related to the over-recovered transmission service charges and $9 million related to over-recovered non-bypassable transmission service charges. As of December 31, 2017, PECO's regulatory liability of $60 million included $36 million related to over-recovered costs under the DSP program, $12 million related to over-recovered non-bypassable transmission service charges and $12 million related to the over-recovered natural gas costs under the PGC.
(g)
As of March 31, 2018, BGE's regulatory asset of $21 million included $13 million of costs associated with transmission costs recoverable through its FERC approved formula rate, $5 million related to under-recovered electric energy costs and $3 million of abandonment costs to be recovered upon FERC approval. As of March 31, 2018, BGE's regulatory liability of $22 million related to over-recovered natural gas costs. As of December 31, 2017, BGE’s regulatory asset of $23 million included $7 million of costs associated with transmission costs recoverable through its FERC approved formula rate, $5 million related to under-recovered electric energy costs, $3 million of abandonment costs to be recovered upon FERC approval and $8 million of under-recovered natural gas costs.
(h)
As of March 31, 2018, Pepco's regulatory asset of $7 million included $4 million of transmission costs recoverable through its FERC approved formula rate and $3 million related to under-recovered electric energy costs. As of March 31, 2018, Pepco's regulatory liability of $4 million related to over-recovered electric energy costs. As of December 31, 2017, Pepco's regulatory asset of $11 million included $3 million of transmission costs recoverable through its FERC approved formula rate and $8 million of under-recovered electric energy costs.
(i)
As of March 31, 2018, DPL's regulatory asset of $14 million included $11 million of transmission costs recoverable through its FERC approved formula rate and $3 million related to under-recovered electric energy costs. As of March 31, 2018, DPL's regulatory liability of $6 million related to over-recovered electric energy and gas fuel costs. As of December 31, 2017, DPL's regulatory asset of $15 million included $8 million of transmission costs recoverable through its FERC approved formula rate and $7 million related to under-recovered electric energy costs. As of December 31, 2017, DPL's regulatory liability of $1 million related to over-recovered electric energy costs.
(j)
As of March 31, 2018, ACE's regulatory asset of $24 million included $9 million of transmission costs recoverable through its FERC approved formula rate and $15 million of under-recovered electric energy costs. As of March 31, 2018, ACE's regulatory liability of $12 million related to over-recovered electric energy costs. As of December 31, 2017, ACE's regulatory asset of $26 million included $11 million of transmission costs recoverable through its FERC approved formula rate and $15 million of under-recovered electric energy costs. As of December 31, 2017, ACE's regulatory liability of $3 million related to over-recovered electric energy costs.
(k)
As of March 31, 2018 and December 31, 2017, Pepco’s regulatory asset of $20 million represents previously incurred PHI integration costs, including $11 million authorized for recovery in Maryland and $9 million expected to be recovered in the District of Columbia service territory.
(l)
As of March 31, 2018, DPL’s regulatory asset of $11 million represents previously incurred PHI integration costs, including $4 million authorized for recovery in Maryland, $5 million authorized for recovery in Delaware electric rates and $2 million authorized for recovery in Delaware gas rates. As of March 31, 2018, DPL’s regulatory liability of $1 million represents net synergy savings incurred related to PHI integration costs that are expected to be returned in electric and gas rates in the Delaware service territory. As of December 31, 2017, DPL’s regulatory asset of $10 million represents previously incurred PHI integration costs, including $4 million authorized for recovery in Maryland, $5 million authorized for recovery in Delaware electric rates, and $1 million expected to be recovered in electric and gas rates in the Maryland and Delaware service territories.
(m)
As of March 31, 2018 and December 31, 2017, ACE’s regulatory asset of $10 million and $9 million, respectively, represents previously incurred PHI integration costs expected to be recovered in the New Jersey service territory.
(n)
Represents the electric and natural gas distribution costs recoverable from customers under BGE’s decoupling mechanism. As of March 31, 2018, BGE had a regulatory asset of $6 million related to under-recovered electric revenue decoupling and a regulatory liability of $11 million related to over-recovered natural gas revenue decoupling. As of December 31, 2017, BGE had a regulatory asset of $10 million related to under-recovered electric revenue decoupling and $4 million related to under-recovered natural gas revenue decoupling.
Schedule of Regulatory Liabilities
he following tables provide information about the regulatory assets and liabilities of Exelon, ComEd, PECO, BGE, PHI, Pepco, DPL and ACE as of March 31, 2018 and December 31, 2017. For additional information on the specific regulatory assets and liabilities, refer to Note 3Regulatory Matters of the Exelon 2017 Form 10-K.
March 31, 2018
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and other postretirement benefits(a)
$
3,844

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes
336

 

 
327

 

 
9

 
9

 

 

AMI programs(c)
621

 
151

 
33

 
208

 
229

 
154

 
75

 

Electric distribution formula rate(d)
256

 
256

 

 

 

 

 

 

Energy efficiency costs
220

 
220

 

 

 

 

 

 

Debt costs
108

 
36

 
1

 
11

 
71

 
15

 
7

 
5

Fair value of long-term debt
745

 

 

 

 
607

 

 

 

Fair value of PHI's unamortized energy contracts
701

 

 

 

 
701

 

 

 

Asset retirement obligations
111

 
75

 
22

 
14

 

 

 

 

MGP remediation costs
284

 
263

 
21

 

 

 

 

 

Under-recovered uncollectible accounts
69

 
69

 

 

 

 

 

 

Renewable energy
268

 
267

 

 

 
1

 

 

 
1

Energy and transmission programs(e)(f)(g)(h)(i)(j)
117

 
8

 
43

 
21

 
45

 
7

 
14

 
24

Deferred storm costs
46

 

 

 

 
46

 
12

 
5

 
29

Energy efficiency and demand response programs
559

 

 
1

 
269

 
289

 
212

 
77

 

Merger integration costs(k)(l)(m)
46

 

 

 
5

 
41

 
20

 
11

 
10

Under-recovered revenue decoupling(n)
44

 

 

 
6

 
38

 
38

 

 

COPCO acquisition adjustment
5

 

 

 

 
5

 

 
5

 

Workers compensation and long-term disability costs
33

 

 

 

 
33

 
33

 

 

Vacation accrual
27

 

 
14

 

 
13

 

 
8

 
5

Securitized stranded costs
71

 

 

 

 
71

 

 

 
71

CAP arrearage
12

 

 
12

 

 

 

 

 

Removal costs
535

 

 

 

 
535

 
150

 
94

 
292

DC PLUG charge
187

 

 

 

 
187

 
187

 

 

Other
63

 
6

 
12

 
6

 
39

 
26

 
9

 
4

Total regulatory assets
9,308

 
1,351

 
486

 
540

 
2,960

 
863

 
305

 
441

Less: current portion
1,245

 
226

 
78

 
149

 
507

 
207

 
63

 
64

Total noncurrent regulatory assets
$
8,063

 
$
1,125

 
$
408

 
$
391

 
$
2,453

 
$
656

 
$
242

 
$
377

March 31, 2018
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other postretirement benefits
$
26

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes(b)
5,189

 
2,458

 

 
1,011

 
1,720

 
804

 
506

 
410

Nuclear decommissioning
2,969

 
2,464

 
505

 

 

 

 

 

Removal costs
1,570

 
1,348

 

 
92

 
130

 
20

 
110

 

Deferred rent
35

 

 

 

 
35

 

 

 

Energy efficiency and demand response programs
16

 
4

 
11

 

 
1

 

 

 
1

DLC program costs
7

 

 
7

 

 

 

 

 

Electric distribution tax repairs
27

 

 
27

 

 

 

 

 

Gas distribution tax repairs
8

 

 
8

 

 

 

 

 

Energy and transmission programs(e)(f)(g)(h)(i)(j)
153

 
53

 
56

 
22

 
22

 
4

 
6

 
12

Over-recovered revenue decoupling(n)
14

 

 

 
11

 
3

 

 
3

 

Renewable portfolio standards costs
81

 
81

 

 

 

 

 

 

Zero emission credit costs
8

 
8

 

 

 

 

 

 

Over-recovered uncollectible accounts
4

 

 

 

 
4

 

 

 
4

Merger integration costs(l)
1

 

 

 

 
1

 

 
1

 

TCJA income tax benefit over-recoveries(o)
54

 

 
10

 
17

 
27

 
14

 
7

 
6

Other
84

 
8

 
22

 
32

 
22

 
3

 
13

 
4

Total regulatory liabilities
10,246

 
6,424

 
646

 
1,185

 
1,965

 
845

 
646

 
437

Less: current portion
522

 
212

 
117

 
102

 
77

 
7

 
48

 
21

Total noncurrent regulatory liabilities
$
9,724

 
$
6,212

 
$
529

 
$
1,083

 
$
1,888

 
$
838

 
$
598

 
$
416


December 31, 2017
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and other postretirement benefits(a)
$
3,848

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes
306

 

 
297

 

 
9

 
9

 

 

AMI programs(c)
640

 
155

 
36

 
214

 
235

 
158

 
77

 

Electric distribution formula rate(d)
244

 
244

 

 

 

 

 

 

Energy efficiency costs
166

 
166

 

 

 

 

 

 

Debt costs
116

 
37

 
1

 
11

 
73

 
15

 
8

 
5

Fair value of long-term debt
758

 

 

 

 
619

 

 

 

Fair value of PHI's unamortized energy contracts
750

 

 

 

 
750

 

 

 

Asset retirement obligations
109

 
73

 
22

 
14

 

 

 

 

MGP remediation costs
295

 
273

 
22

 

 

 

 

 

Under-recovered uncollectible accounts
61

 
61

 

 

 

 

 

 

Renewable energy
258

 
256

 

 

 
2

 

 
1

 
1

Energy and transmission programs(e)(g)(h)(i)(j)
82

 
6

 
1

 
23

 
52

 
11

 
15

 
26

Deferred storm costs
27

 

 

 

 
27

 
7

 
5

 
15

Energy efficiency and demand response programs
596

 

 
1

 
285

 
310

 
229

 
81

 

Merger integration costs(k)(l)(m)
45

 

 

 
6

 
39

 
20

 
10

 
9

Under-recovered revenue decoupling(n)
55

 

 

 
14

 
41

 
38

 
3

 

COPCO acquisition adjustment
5

 

 

 

 
5

 

 
5

 

Workers compensation and long-term disability costs
35

 

 

 

 
35

 
35

 

 

Vacation accrual
19

 

 
6

 

 
13

 

 
8

 
5

Securitized stranded costs
79

 

 

 

 
79

 

 

 
79

CAP arrearage
8

 

 
8

 

 

 

 

 

Removal costs
529

 

 

 

 
529

 
150

 
93

 
286

DC PLUG charge
190

 

 

 

 
190

 
190

 

 

Other
67

 
8

 
16

 
4

 
39

 
29

 
8

 
4

Total regulatory assets
9,288

 
1,279

 
410

 
571

 
3,047

 
891

 
314

 
430

Less: current portion
1,267

 
225

 
29

 
174

 
554

 
213

 
69

 
71

Total noncurrent regulatory assets
$
8,021

 
$
1,054

 
$
381

 
$
397

 
$
2,493

 
$
678

 
$
245

 
$
359

December 31, 2017
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Regulatory liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other postretirement benefits
$
30

 
$

 
$

 
$

 
$

 
$

 
$

 
$

Deferred income taxes(b)
5,241

 
2,479

 

 
1,032

 
1,730

 
809

 
510

 
411

Nuclear decommissioning
3,064

 
2,528

 
536

 

 

 

 

 

Removal costs
1,573

 
1,338

 

 
105

 
130

 
20

 
110

 

Deferred rent
36

 

 

 

 
36

 

 

 

Energy efficiency and demand response programs
23

 
4

 
19

 

 

 

 

 

DLC program costs
7

 

 
7

 

 

 

 

 

Electric distribution tax repairs
35

 

 
35

 

 

 

 

 

Gas distribution tax repairs
9

 

 
9

 

 

 

 

 

Energy and transmission programs(e)(f)(i)(j)
111

 
47

 
60

 

 
4

 

 
1

 
3

Renewable portfolio standard costs
63

 
63

 

 

 

 

 

 

Zero emission credit costs
112

 
112

 

 

 

 

 

 

Over-recovered uncollectible accounts
2

 

 

 

 
2

 

 

 
2

Other
82

 
6

 
24

 
26

 
26

 
3

 
14

 
6

Total regulatory liabilities
10,388

 
6,577

 
690

 
1,163

 
1,928

 
832

 
635

 
422

Less: current portion
523

 
249

 
141

 
62

 
56

 
3

 
42

 
11

Total noncurrent regulatory liabilities
$
9,865

 
$
6,328

 
$
549

 
$
1,101

 
$
1,872

 
$
829

 
$
593

 
$
411

_________
(a)
Includes regulatory regulatory assets established at the Constellation and PHI merger dates of $427 million and $934 million, respectively, as of March 31, 2018 and $440 million and $953 million, respectively, as of December 31, 2017 related to the rate regulated portions of the deferred costs associated with legacy Constellation’s and PHI’s pension and other postretirement benefit plans that are being amortized and recovered over approximately 12 years and 3 to 15 years, respectively (as established at the respective acquisition dates). The Utility Registrants are not earning or paying a return on these amounts.
(b)
As of March 31, 2018, includes transmission-related income tax regulatory liabilities that require FERC approval separate from the transmission formula rate of $479 million, $135 million, $146 million, $147 million and $147 million for ComEd, BGE, Pepco, DPL and ACE, respectively. As of December 31, 2017, includes transmission-related income tax regulatory liabilities that require FERC approval separate from the transmission formula rate of $484 million, $137 million, $147 million, $148 million and $147 million for ComEd, BGE, Pepco, DPL and ACE, respectively.
(c)
As of March 31, 2018, BGE's regulatory asset of $208 million includes $125 million of unamortized incremental deployment costs under the program, $51 million of unamortized costs of the non-AMI meters replaced under the AMI program, and $32 million related to post-test year incremental program deployment costs incurred prior to approval became effective June 2016. As of December 31, 2017, BGE's regulatory asset of $214 million includes $129 million of unamortized incremental deployment costs under the program, $53 million of unamortized costs of the non-AMI meters replaced under the AMI program, and $32 million related to post-test year incremental program deployment costs incurred prior to approval became effective June 2016. Recovery of the post-test year incremental deployment costs will be addressed in a future base rate proceeding.
(d)
As of March 31, 2018, ComEd’s regulatory asset of $256 million was comprised of $195 million for the 2016, 2017 and 2018 annual reconciliations and $61 million related to significant one-time events. As of December 31, 2017, ComEd’s regulatory asset of $244 million was comprised of $186 million for the 2016 and 2017 annual reconciliations and $58 million related to significant one-time events.
(e)
As of March 31, 2018, ComEd’s regulatory asset of $8 million represents transmission costs recoverable through its FERC approved formula rate. As of March 31, 2018, ComEd’s regulatory liability of $53 million included $21 million related to over-recovered energy costs and $32 million associated with revenues received for renewable energy requirements. As of December 31, 2017, ComEd’s regulatory asset of $6 million represents transmission costs recoverable through its FERC approved formula rate. As of December 31, 2017, ComEd’s regulatory liability of $47 million included $14 million related to over-recovered energy costs and $33 million associated with revenues received for renewable energy requirements.
(f)
As of March 31, 2018, PECO's regulatory liability of $56 million included $44 million related to over-recovered costs under the DSP program, $3 million related to the over-recovered transmission service charges and $9 million related to over-recovered non-bypassable transmission service charges. As of December 31, 2017, PECO's regulatory liability of $60 million included $36 million related to over-recovered costs under the DSP program, $12 million related to over-recovered non-bypassable transmission service charges and $12 million related to the over-recovered natural gas costs under the PGC.
(g)
As of March 31, 2018, BGE's regulatory asset of $21 million included $13 million of costs associated with transmission costs recoverable through its FERC approved formula rate, $5 million related to under-recovered electric energy costs and $3 million of abandonment costs to be recovered upon FERC approval. As of March 31, 2018, BGE's regulatory liability of $22 million related to over-recovered natural gas costs. As of December 31, 2017, BGE’s regulatory asset of $23 million included $7 million of costs associated with transmission costs recoverable through its FERC approved formula rate, $5 million related to under-recovered electric energy costs, $3 million of abandonment costs to be recovered upon FERC approval and $8 million of under-recovered natural gas costs.
(h)
As of March 31, 2018, Pepco's regulatory asset of $7 million included $4 million of transmission costs recoverable through its FERC approved formula rate and $3 million related to under-recovered electric energy costs. As of March 31, 2018, Pepco's regulatory liability of $4 million related to over-recovered electric energy costs. As of December 31, 2017, Pepco's regulatory asset of $11 million included $3 million of transmission costs recoverable through its FERC approved formula rate and $8 million of under-recovered electric energy costs.
(i)
As of March 31, 2018, DPL's regulatory asset of $14 million included $11 million of transmission costs recoverable through its FERC approved formula rate and $3 million related to under-recovered electric energy costs. As of March 31, 2018, DPL's regulatory liability of $6 million related to over-recovered electric energy and gas fuel costs. As of December 31, 2017, DPL's regulatory asset of $15 million included $8 million of transmission costs recoverable through its FERC approved formula rate and $7 million related to under-recovered electric energy costs. As of December 31, 2017, DPL's regulatory liability of $1 million related to over-recovered electric energy costs.
(j)
As of March 31, 2018, ACE's regulatory asset of $24 million included $9 million of transmission costs recoverable through its FERC approved formula rate and $15 million of under-recovered electric energy costs. As of March 31, 2018, ACE's regulatory liability of $12 million related to over-recovered electric energy costs. As of December 31, 2017, ACE's regulatory asset of $26 million included $11 million of transmission costs recoverable through its FERC approved formula rate and $15 million of under-recovered electric energy costs. As of December 31, 2017, ACE's regulatory liability of $3 million related to over-recovered electric energy costs.
(k)
As of March 31, 2018 and December 31, 2017, Pepco’s regulatory asset of $20 million represents previously incurred PHI integration costs, including $11 million authorized for recovery in Maryland and $9 million expected to be recovered in the District of Columbia service territory.
(l)
As of March 31, 2018, DPL’s regulatory asset of $11 million represents previously incurred PHI integration costs, including $4 million authorized for recovery in Maryland, $5 million authorized for recovery in Delaware electric rates and $2 million authorized for recovery in Delaware gas rates. As of March 31, 2018, DPL’s regulatory liability of $1 million represents net synergy savings incurred related to PHI integration costs that are expected to be returned in electric and gas rates in the Delaware service territory. As of December 31, 2017, DPL’s regulatory asset of $10 million represents previously incurred PHI integration costs, including $4 million authorized for recovery in Maryland, $5 million authorized for recovery in Delaware electric rates, and $1 million expected to be recovered in electric and gas rates in the Maryland and Delaware service territories.
(m)
As of March 31, 2018 and December 31, 2017, ACE’s regulatory asset of $10 million and $9 million, respectively, represents previously incurred PHI integration costs expected to be recovered in the New Jersey service territory.
(n)
Represents the electric and natural gas distribution costs recoverable from customers under BGE’s decoupling mechanism. As of March 31, 2018, BGE had a regulatory asset of $6 million related to under-recovered electric revenue decoupling and a regulatory liability of $11 million related to over-recovered natural gas revenue decoupling. As of December 31, 2017, BGE had a regulatory asset of $10 million related to under-recovered electric revenue decoupling and $4 million related to under-recovered natural gas revenue decoupling.
Purchase Of Receivables
The following tables provide information about the purchased receivables of those companies as of March 31, 2018 and December 31, 2017.
As of March 31, 2018
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Purchased receivables
$
317

 
$
88

 
$
73

 
$
64

 
$
92

 
$
55

 
$
17

 
$
20

Allowance for uncollectible accounts(a)
(35
)
 
(16
)
 
(6
)
 
(4
)
 
(9
)
 
(5
)
 
(1
)
 
(3
)
Purchased receivables, net
$
282

 
$
72

 
$
67

 
$
60

 
$
83

 
$
50

 
$
16

 
$
17

As of December 31, 2017
Exelon
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Purchased receivables
$
298

 
$
87

 
$
70

 
$
58

 
$
83

 
$
56

 
$
9

 
$
18

Allowance for uncollectible accounts(a)
(31
)
 
(14
)
 
(5
)
 
(3
)
 
(9
)
 
(5
)
 
(1
)
 
(3
)
Purchased receivables, net
$
267

 
$
73

 
$
65

 
$
55

 
$
74

 
$
51

 
$
8

 
$
15

_________
(a)
For ComEd, BGE, Pepco and DPL, reflects the incremental allowance for uncollectible accounts recorded, which is in addition to the purchase discount. For ComEd, the incremental uncollectible accounts expense is recovered through its Purchase of Receivables with Consolidated Billing tariff.