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Supplemental Financial Information (Tables)
 9 Months Ended
Sep. 30, 2018
Supplemental Financial Information [Abstract]  
Components of non-operating income and expenses
The following tables provide additional information about the Registrants’ Consolidated Statements of Operations and Comprehensive Income for the three and nine months ended September 30, 2018 and 2017.
 
Three Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other, Net
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Decommissioning-related activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized income on decommissioning trust funds(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
$
214

 
$
214

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Non-regulatory agreement units
58

 
58

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized (losses) gains on decommissioning trust funds
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
(66
)
 
(66
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Non-regulatory agreement units
72

 
72

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized losses on pledged assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Zion Station decommissioning
(9
)
 
(9
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Regulatory offset to decommissioning trust fund-related activities(b)
(110
)
 
(110
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total decommissioning-related activities
159

 
159

 
—

 
$
—

 
—


—

 
—

 
—

 
—

Investment income
9

 
5

 
—

 
—

 
—

 
2

 
1

 
1

 
—

Interest income related to uncertain income tax positions
1

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

AFUDC — Equity
16

 
—

 
4

 
1

 
5

 
6

 
6

 
—

 
—

Non-service net periodic benefit cost
(12
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other
21

 
15

 
3

 
1

 
—

 
3

 
—

 
1

 
1

Other, net
$
194


$
179


$
7


2


$
5


$
11


$
7


$
2


$
1

 
Nine Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other, Net
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Decommissioning-related activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized income on decommissioning trust funds(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
$
476

 
$
476

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Non-regulatory agreement units
257

 
257

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized losses on decommissioning trust funds
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
(335
)
 
(335
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Non-regulatory agreement units
(143
)
 
(143
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized losses on pledged assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Zion Station decommissioning
(7
)
 
(7
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Regulatory offset to decommissioning trust fund-related activities(b)
(110
)
 
(110
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total decommissioning-related activities
138

 
138

 
—

 
—

 
—

 
—


—

 
—

 
—

Investment income
19

 
12

 
—

 
—

 
—

 
3

 
1

 
1

 
—

Interest income related to uncertain income tax positions
5

 
1

 
—

 
—

 
—

 
—

 
—

 
—

 
—

AFUDC — Equity
47

 
—

 
12

 
3

 
13

 
19

 
17

 
2

 
—

Non-service net periodic benefit cost
(33
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other
36

 
13

 
9

 
1

 
1

 
11

 
5

 
4

 
2

Other, net
$
212


$
164


$
21


$
4


$
14

 
$
33


$
23


$
7


$
2

 
Three Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other, Net
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Decommissioning-related activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized income on decommissioning trust funds(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
$
159

 
$
159

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Non-regulatory agreement units
59

 
59

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized gains on decommissioning trust funds
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
44

 
44

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Non-regulatory agreement units
111

 
111

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized losses on pledged assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Zion Station decommissioning
(4
)
 
(4
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Regulatory offset to decommissioning trust fund-related activities(b)
(161
)
 
(161
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total decommissioning-related activities
208

 
208

 
—

 
—

 
—


—


—

 
—

 
—

Investment income
2

 
1

 
—

 
—

 
—

 
1

 
1

 
—

 
—

Interest expense related to uncertain income tax positions
4

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

AFUDC — Equity
17

 
—

 
2

 
2

 
4

 
9

 
6

 
2

 
1

Non-service net periodic benefit cost
(27
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other
6

 
—

 
3

 
—

 
—

 
3

 
—

 
2

 
—

Other, net
$
210


$
209


$
5


$
2


$
4

 
$
13


$
7


$
4


$
1

 
Nine Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other, Net
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Decommissioning-related activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized income on decommissioning trust funds(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
$
439

 
$
439

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Non-regulatory agreement units
165

 
165

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized gains on decommissioning trust funds
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Regulatory agreement units
253

 
253

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Non-regulatory agreement units
347

 
347

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Net unrealized losses on pledged assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Zion Station decommissioning
(5
)
 
(5
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Regulatory offset to decommissioning trust fund-related activities(b)
(558
)
 
(558
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total decommissioning-related activities
641

 
641

 
—

 
—

 
—

 
—


—

 
—

 
—

Investment income
6

 
4

 
—

 
—

 
—

 
2

 
1

 
—

 
—

Interest income related to uncertain income tax positions
3

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Penalty income related to uncertain income tax positions
2

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

AFUDC — Equity
51

 
—

 
6

 
6

 
12

 
27

 
17

 
5

 
5

Non-service net periodic benefit cost
(82
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other
22

 
3

 
8

 
—

 
—

 
11

 
4

 
5

 
1

Other, net
$
643


$
648


$
14


$
6


$
12

 
$
40


$
22

 
$
10

 
$
6

_________
(a)
Includes investment income and realized gains and losses on sales of investments of the trust funds.
(b)
Includes the elimination of NDT fund activity for the Regulatory Agreement Units, including the elimination of net income taxes related to all NDT fund activity for those units. See Note 15 — Asset Retirement Obligations of the Exelon 2017 Form 10-K for additional information regarding the accounting for nuclear decommissioning.
Schedule Of Taxes Excluding Income And Excise Taxes [Text Block]
The following utility taxes are included in revenues and expenses for the three and nine months ended September 30, 2018 and 2017. Generation’s utility tax expense represents gross receipts tax related to its retail operations, and the Utility Registrants' utility tax expense represents municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.
 
Three Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Utility taxes
$
253


$
32


$
67


$
39


$
23

 
$
92

 
$
87


$
5


$
—


 
Nine Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Utility taxes
$
705


$
92


$
188


$
102


$
70

 
$
253

 
$
238


$
15


$
—

 
Three Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Utility taxes
$
245


$
35


$
65


$
35


$
22

 
$
88

 
$
83


$
5


$
—

 
Nine Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Utility taxes
$
682


$
97


$
181


$
95


$
69

 
$
240

 
$
226


$
14


$
—
Components of depreciation, amortization and accretion, and other, net
The following tables provide additional information regarding the Registrants’ Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017.
 
Nine Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Depreciation, amortization and accretion
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Property, plant and equipment(a)
$
2,829

 
$
1,347

 
$
613

 
$
204

 
$
249

 
$
355

 
$
161

 
$
97

 
$
70

Amortization of regulatory assets(a)
412

 
—

 
83

 
20

 
109

 
200

 
125

 
38

 
37

Amortization of intangible assets, net(a)
43

 
36

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of energy contract assets and liabilities(b)
8

 
8

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Nuclear fuel(c)
852

 
852

 
—

 
—

 
—

 
—

 
—

 
—

 
—

ARO accretion(d)
367

 
365

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total depreciation, amortization and accretion
$
4,511


$
2,608


$
696


$
224


$
358

 
$
555

 
$
286


$
135


$
107

 
Nine Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Depreciation, amortization and accretion
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Property, plant and equipment(a)
$
2,416

 
$
1,010

 
$
579

 
$
194

 
$
233

 
$
342

 
$
153

 
$
92

 
$
66

Amortization of regulatory assets(a)
355

 
—

 
52

 
19

 
115

 
169

 
89

 
32

 
47

Amortization of intangible assets, net(a)
43

 
36

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of energy contract assets and liabilities(b)
19

 
19

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Nuclear fuel(c)
816

 
816

 
—

 
—

 
—

 
—

 
—

 
—

 
—

ARO accretion(d)
350

 
350

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Total depreciation, amortization and accretion
$
3,999


$
2,231


$
631


$
213


$
348

 
$
511

 
$
242


$
124


$
113

_________
(a)
Included in Depreciation and amortization on the Registrants' Consolidated Statements of Operations and Comprehensive Income.
(b)
Included in Operating revenues or Purchased power and fuel expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.
(c)
Included in Purchased power and fuel expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.
(d)
Included in Operating and maintenance expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income
Cash Flow Supplemental Disclosures
 
Nine Months Ended September 30, 2018
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other non-cash operating activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and non-pension postretirement benefit costs
$
435

 
$
151

 
$
133

 
$
14

 
$
43

 
$
51

 
$
10

 
$
5

 
$
10

Loss (gain) from equity method investments
22

 
23

 
—

 
—

 
—

 
(1
)
 
—

 
—

 
—

Provision for uncollectible accounts
133

 
38

 
30

 
25

 
6

 
32

 
12

 
6

 
14

Stock-based compensation costs
64

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other decommissioning-related activity(a)
(39
)
 
(39
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Energy-related options(b)
4

 
4

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of regulatory asset related to debt costs
6

 
—

 
2

 
—

 
—

 
3

 
1

 
1

 
1

Amortization of rate stabilization deferral
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of debt fair value adjustment
(12
)
 
(9
)
 
—

 
—

 
—

 
(3
)
 
—

 
—

 
—

Discrete impacts from EIMA and FEJA(c)
27

 
—

 
27

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of debt costs
26

 
10

 
4

 
1

 
1

 
3

 
2

 
1

 
—

Provision for excess and obsolete inventory
15

 
13

 
2

 
—

 
—

 
—

 
—

 
—

 
—

Long-term incentive plan
84

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Asset retirement costs
20

 
—

 
—

 
—

 
—

 
20

 
22

 
(1
)
 
(1
)
Other
19

 
(4
)
 
(11
)
 
1

 
(8
)
 
4

 
(5
)
 
4

 
—

Total other non-cash operating activities
$
804


$
187


$
187


$
41


$
42

 
$
109

 
$
42


$
16


$
24

Non-cash investing and financing activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Decrease) increase in capital expenditures not paid
$
(175
)
 
$
(226
)
 
$
(28
)
 
$
4

 
$
44

 
$
54

 
$
15

 
$
20

 
$
16

Increase in PPE related to ARO update
67

 
47

 
4

 
—

 
1

 
15

 
12

 
2

 
1

Dividends on stock compensation
4

 
—

 
—

 
—

 
—

 
—

 
—


—

 
—

Acquisition of land
3

 
—

 
—

 
—

 
—

 
3

 
—

 
—

 
3

 
Nine Months Ended September 30, 2017
 
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Other non-cash operating activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and non-pension postretirement benefit costs
$
482

 
$
170

 
$
131

 
$
21

 
$
47

 
$
72

 
$
19

 
$
10

 
$
10

Loss from equity method investments
26

 
26

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Provision for uncollectible accounts
103

 
31

 
25

 
17

 
4

 
26

 
11

 
1

 
14

Stock-based compensation costs
76

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other decommissioning-related activity(a)
(213
)
 
(213
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Energy-related options(b)
15

 
15

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Amortization of regulatory asset related to debt costs
7

 
—

 
3

 
1

 
—

 
3

 
1

 
1

 
1

Amortization of rate stabilization deferral
(7
)
 
—

 
—

 
—

 
7

 
(14
)
 
(12
)
 
(2
)
 
—

Amortization of debt fair value adjustment
(13
)
 
(9
)
 
—

 
—

 
—

 
(4
)
 
—

 
—

 
—

Discrete impacts from EIMA and FEJA (c)
(61
)
 
—

 
(61
)
 
—

 
—

 
—

 
—

 
—

 
—

Amortization of debt costs
57

 
33

 
3

 
1

 
1

 
1

 
1

 
—

 
—

Provision for excess and obsolete inventory
52

 
50

 
1

 
—

 
—

 
1

 
—

 
1

 
—

Merger-related commitments(d)
—

 
—

 
—

 
—

 
—

 
(8
)
 
(6
)
 
(2
)
 
—

Severance costs
33

 
25

 
—

 
—

 
—

 
3

 
—

 
—

 
—

Other
46

 
4

 
10

 
(2
)
 
(7
)
 
(14
)
 
(6
)
 
(3
)
 
(4
)
Total other non-cash operating activities
$
603


$
132


$
112


$
38


$
52

 
$
66

 
$
8


$
6


$
21

Non-cash investing and financing activities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Decrease) increase in capital expenditures not paid
$
(101
)
 
$
20

 
$
(79
)
 
$
(29
)
 
$
16

 
$
(6
)
 
$
7

 
$
14

 
$
(18
)
Fair value of pension obligation transferred in connection with the FitzPatrick acquisition
—

 
33

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Decrease in PPE related to ARO update
(141
)
 
(141
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

Indemnification of like-kind exchange tax position(e)
—

 
—

 
21

 
—

 
—

 
—

 
—

 
—

 
—

Non-cash financing of capital projects
16

 
16

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Dividends on stock compensation
5

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Dissolution of financing trust due to long-term debt retirement
8

 
—

 
—

 
—

 
8

 
—

 
—

 
—

 
—

Fair value adjustment of long-term debt due to retirement
(5
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—


_________
(a)
Includes the elimination of decommissioning-related activities for the Regulatory Agreement Units, including the elimination of operating revenues, ARO accretion, ARC amortization, investment income and income taxes related to all NDT fund activity for these units. See Note 15 — Asset Retirement Obligations of the Exelon 2017 Form 10-K for additional information regarding the accounting for nuclear decommissioning.
(b)
Includes option premiums reclassified to realized at the settlement of the underlying contracts and recorded in Operating revenues and expenses.
(c)
Reflects the change in ComEd's distribution and energy efficiency formula rates. See Note 6 — Regulatory Matters for additional information.
(d)
See Note 4 - Mergers, Acquisitions and Dispositions for additional information.
(e)
See Note 12 - Income Taxes for additional information on the like-kind exchange tax position.
Supplemental Balance Sheet Disclosures
The following tables provide a reconciliation of cash, cash equivalents and restricted cash reported within the Registrants’ Consolidated Balance Sheets that sum to the total of the same amounts in their Consolidated Statements of Cash Flows.
September 30, 2018
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Cash and cash equivalents
$
1,918

 
$
1,187

 
$
124

 
$
102

 
$
113

 
$
153

 
$
12

 
$
110

 
$
11

Restricted cash
240

 
152

 
12

 
5

 
3

 
42

 
35

 
—

 
7

Restricted cash included in other long-term assets
163

 
—

 
144

 
—

 
—

 
19

 
—

 
—

 
19

Total cash, cash equivalents and restricted cash
$
2,321

 
$
1,339

 
$
280

 
$
107

 
$
116

 
$
214

 
$
47

 
$
110

 
$
37

December 31, 2017
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Cash and cash equivalents
$
898

 
$
416

 
$
76

 
$
271

 
$
17

 
$
30

 
$
5

 
$
2

 
$
2

Restricted cash
207

 
138

 
5

 
4

 
1

 
42

 
35

 
—

 
6

Restricted cash included in other long-term assets
85

 
—

 
63

 
—

 
—

 
23

 
—

 
—

 
23

Total cash, cash equivalents and restricted cash
$
1,190

 
$
554

 
$
144

 
$
275

 
$
18

 
$
95

 
$
40

 
$
2

 
$
31

September 30, 2017
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Cash and cash equivalents
$
1,203

 
$
360

 
$
257

 
$
330

 
$
29

 
$
137

 
$
117

 
$
3

 
$
5

Restricted cash
320

 
186

 
52

 
4

 
1

 
43

 
34

 
—

 
9

Restricted cash included in other long-term assets
22

 
—

 
—

 
—

 
—

 
22

 
—

 
—

 
22

Total cash, cash equivalents and restricted cash
$
1,545

 
$
546

 
$
309

 
$
334

 
$
30

 
$
202

 
$
151

 
$
3

 
$
36

December 31, 2016
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Cash and cash equivalents
$
635

 
$
290

 
$
56

 
$
63

 
$
23

 
$
170

 
$
9

 
$
46

 
$
101

Restricted cash
253

 
158

 
2

 
4

 
24

 
43

 
33

 
—

 
9

Restricted cash included in other long-term assets
26

 
—

 
—

 
—

 
3

 
23

 
—

 
—

 
23

Total cash, cash equivalents and restricted cash
$
914

 
$
448

 
$
58

 
$
67

 
$
50

 
$
236

 
$
42

 
$
46

 
$
133

For additional information on restricted cash see Note 1 — Significant Accounting Policies of the Exelon 2017 Form 10-K. 
Supplemental Balance Sheet Information
The following tables provide additional information about assets and liabilities of the Registrants as of September 30, 2018 and December 31, 2017.
September 30, 2018
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Property, plant and equipment:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Accumulated depreciation and amortization
$
23,122

(a) 
$
12,753

(a)  
$
4,557


$
3,521


$
3,579

 
$
759

 
$
3,311


$
1,315


$
1,121

Accounts receivable:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for uncollectible accounts
$
354


$
112


$
93


$
61


$
22

 
$
66

 
$
25


$
16


$
25

December 31, 2017
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
PHI
 
Pepco
 
DPL
 
ACE
Property, plant and equipment:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Accumulated depreciation and amortization
$
21,064

(b) 
$
11,428

(b) 
$
4,269


$
3,411


$
3,405

 
$
487

 
$
3,177


$
1,247


$
1,066

Accounts receivable:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for uncollectible accounts
$
322


$
114


$
73


$
56


$
24

 
$
55

 
$
21


$
16


$
18

_________
(a)
Includes accumulated amortization of nuclear fuel in the reactor core of $3,278 million.
(b)
Includes accumulated amortization of nuclear fuel in the reactor core of $3,159 million