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Revenue (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table represents a disaggregation of revenue from contracts with regulated transmission customers by transmission owner for the three and six months ended June 30, 2019 and 2018, by transmission owner:
 
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
Transmission Owner
 
2019
 
2018
 
2019
 
2018
 
 
(In millions)
ATSI
 
$
184

 
$
167

 
$
358

 
$
325

TrAIL
 
59

 
63

 
117

 
123

MAIT
 
50

 
34

 
99

 
64

Other
 
74

 
72

 
145

 
143

Total Revenues
 
$
367

 
$
336

 
$
719

 
$
655


The following table represents a disaggregation of the Regulated Distribution segment revenue from contracts with distribution service and retail generation customers for the three and six months ended June 30, 2019 and 2018, by class:
 
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
Revenues by Customer Class
 
2019
 
2018
 
2019
 
2018
 
 
(In millions)
Residential
 
$
1,123

 
$
1,255

 
$
2,607

 
$
2,718

Commercial
 
572

 
570

 
1,159

 
1,150

Industrial
 
251

 
262

 
500

 
516

Other
 
20

 
23

 
44

 
47

Total Revenues
 
$
1,966

 
$
2,110

 
$
4,310

 
$
4,431



The following tables represent a disaggregation of revenue from contracts with customers for the three months ended June 30, 2019 and 2018, by type of service from each reportable segment:


For the Three Months Ended June 30, 2019
Revenues by Type of Service

Regulated Distribution

Regulated Transmission

Corporate/Other and Reconciling Adjustments (1)

Total


(In millions)
Distribution services

$
1,160


$
—


$
(21
)

$
1,139

Retail generation

806


—


(14
)

792

Wholesale sales

110


—


3


113

Transmission(2)

—


367


—


367

Other

37


—


—


37

Total revenues from contracts with customers

$
2,113


$
367


$
(32
)

$
2,448

ARP

55


—


—


55

Other non-customer revenue

24


5


(16
)

13

Total revenues
 
$
2,192

 
$
372

 
$
(48
)
 
$
2,516


(1) Includes eliminations and reconciling adjustments of inter-segment revenues.
(2) Includes $2 million in reductions at Regulated Transmission to revenue related to amounts subject to refund resulting from the Tax Act.
 
 
For the Three Months Ended June 30, 2018
Revenues by Type of Service
 
Regulated Distribution
 
Regulated Transmission
 
Corporate/Other and Reconciling Adjustments (1)
 
Total
 
 
(In millions)
Distribution services(2)
 
$
1,228

 
$
—

 
$
(47
)
 
$
1,181

Retail generation
 
882

 
—

 
(14
)
 
868

Wholesale sales
 
121

 
—

 
5

 
126

Transmission(2)
 
—

 
336

 
—

 
336

Other
 
35

 
—

 
3

 
38

Total revenues from contracts with customers
 
$
2,266

 
$
336

 
$
(53
)
 
$
2,549

ARP
 
60

 
—

 
—

 
60

Other non-customer revenue
 
26

 
5

 
(15
)
 
16

Total revenues
 
$
2,352

 
$
341

 
$
(68
)
 
$
2,625


(1) Includes eliminations and reconciling adjustments of inter-segment revenues.
(2) Includes $8 million in net reductions to revenue related to amounts subject to refund resulting from the Tax Act ($10 million at Regulated Distribution, partially offset by $2 million subject to recovery at Regulated Transmission).

Other non-customer revenue includes revenue from late payment charges of $9 million for both the three months ended June 30, 2019 and 2018, as well as revenue from derivatives of $3 million and $4 million, for the three months ended June 30, 2019 and 2018, respectively.


The following tables represent a disaggregation of revenue from contracts with customers for the six months ended June 30, 2019 and 2018, by type of service from each reportable segment:
 
 
For the Six Months Ended June 30, 2019
Revenues by Type of Service
 
Regulated Distribution
 
Regulated Transmission
 
Corporate/Other and Reconciling Adjustments (1)
 
Total
 
 
(In millions)
Distribution services(2)
 
$
2,446

 
$
—

 
$
(42
)
 
$
2,404

Retail generation
 
1,864

 
—

 
(28
)
 
1,836

Wholesale sales
 
216

 
—

 
7

 
223

Transmission(2)
 
—

 
719

 
—

 
719

Other
 
71

 
—

 
1

 
72

Total revenues from contracts with customers
 
$
4,597

 
$
719

 
$
(62
)
 
$
5,254

ARP
 
117

 
—

 
—

 
117

Other non-customer revenue
 
51

 
9

 
(32
)
 
28

Total revenues
 
$
4,765

 
$
728

 
$
(94
)
 
$
5,399


(1) Includes eliminations and reconciling adjustments of inter-segment revenues.
(2) Includes $34 million in reductions to revenue related to amounts subject to refund resulting from the Tax Act ($27 million at Regulated Distribution and $7 million at Regulated Transmission).
 
 
For the Six Months Ended June 30, 2018
Revenues by Type of Service
 
Regulated Distribution
 
Regulated Transmission
 
Corporate/Other and Reconciling Adjustments (1)
 
Total
 
 
(In millions)
Distribution services(2)
 
$
2,509

 
$
—

 
$
(59
)
 
$
2,450

Retail generation
 
1,922

 
—

 
(28
)
 
1,894

Wholesale sales
 
244

 
—

 
10

 
254

Transmission(2)
 
—

 
655

 
—

 
655

Other
 
70

 
—

 
4

 
74

Total revenues from contracts with customers
 
$
4,745

 
$
655

 
$
(73
)
 
$
5,327

ARP
 
124

 
—

 
—

 
124

Other non-customer revenue
 
59

 
9

 
(32
)
 
36

Total revenues
 
$
4,928

 
$
664

 
$
(105
)
 
$
5,487


(1) Includes eliminations and reconciling adjustments of inter-segment revenues.
(2) Includes $84 million in reductions to revenue related to amounts subject to refund resulting from the Tax Act ($82 million at Regulated Distribution and $2 million at Regulated Transmission).