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



	For the Three Months Ended September 30, 2019
Revenues by Type of Service	Regulated Distribution		Regulated Transmission		Corporate/Other and Reconciling Adjustments ⁽¹⁾			Total
	(In millions)
Distribution services⁽²⁾	$	1,457	$	—	$	(21	)	$	1,436
Retail generation	989		—		(14		)	975
Wholesale sales	100		—		2			102
Transmission⁽²⁾	—		371		—			371
Other	42		—		—			42
Total revenues from contracts with customers	$	2,588	$	371	$	(33	)	$	2,926
ARP	25		—		—			25
Other non-customer revenue	23		4		(15		)	12
Total revenues	$	2,636	$	375	$	(48	)	$	2,963

⁽²⁾Includes reductions to revenue related to amounts subject to refund resulting from the Tax Act ($4 million at Regulated Distribution and $4 million at Regulated Transmission) and Rider DMR as discussed in Note 12, “Regulatory Matters” (approximately $31 million at Regulated Distribution).



	For the Three Months Ended September 30, 2018
Revenues by Type of Service	Regulated Distribution		Regulated Transmission		Corporate/Other and Reconciling Adjustments ⁽¹⁾			Total
	(In millions)
Distribution services⁽²⁾	$	1,440	$	—	$	(22	)	$	1,418
Retail generation	1,059		—		(14		)	1,045
Wholesale sales	133		—		6			139
Transmission⁽²⁾	—		341		—			341
Other	43		—		—			43
Total revenues from contracts with customers	$	2,675	$	341	$	(30	)	$	2,986
ARP	66		—		—			66
Other non-customer revenue	25		5		(18		)	12
Total revenues	$	2,766	$	346	$	(48	)	$	3,064

⁽²⁾Includes $29 million in net reductions to revenue related to amounts subject to refund resulting from the Tax Act ($27 million at Regulated Distribution and $2 million at Regulated Transmission).

Other non-customer revenue includes revenue from late payment charges of $9 million for both the three months ended September 30, 2019 and 2018, as well as revenue from derivatives of $2 million and $4 million, for the three months ended September 30, 2019 and 2018, respectively.

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



	For the Nine Months Ended September 30, 2019
Revenues by Type of Service	Regulated Distribution		Regulated Transmission		Corporate/Other and Reconciling Adjustments ⁽¹⁾			Total
	(In millions)
Distribution services⁽²⁾	$	3,903	$	—	$	(63	)	$	3,840
Retail generation	2,853		—		(42		)	2,811
Wholesale sales	316		—		9			325
Transmission⁽²⁾	—		1,090		—			1,090
Other	113		—		1			114
Total revenues from contracts with customers	$	7,185	$	1,090	$	(95	)	$	8,180
ARP	142		—		—			142
Other non-customer revenue	74		13		(47		)	40
Total revenues	$	7,401	$	1,103	$	(142	)	$	8,362

⁽²⁾Includes reductions to revenue related to amounts subject to refund resulting from the Tax Act ($31 million at Regulated Distribution and $11 million at Regulated Transmission) and Rider DMR as discussed in Note 12, “Regulatory Matters” (approximately $31 million at Regulated Distribution).



	For the Nine Months Ended September 30, 2018
Revenues by Type of Service	Regulated Distribution		Regulated Transmission		Corporate/Other and Reconciling Adjustments ⁽¹⁾			Total
	(In millions)
Distribution services⁽²⁾	$	3,949	$	—	$	(81	)	$	3,868
Retail generation	2,981		—		(42		)	2,939
Wholesale sales	377		—		16			393
Transmission⁽²⁾	—		996		—			996
Other	113		—		4			117
Total revenues from contracts with customers	$	7,420	$	996	$	(103	)	$	8,313
ARP	190		—		—			190
Other non-customer revenue	84		14		(50		)	48
Total revenues	$	7,694	$	1,010	$	(153	)	$	8,551

The following table represents a disaggregation of revenue from contracts with regulated transmission customers by transmission owner for the three and nine months ended September 30, 2019 and 2018, by transmission owner:



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
Transmission Owner	2019		2018		2019		2018
	(In millions)
ATSI	$	184	$	167	$	542	$	492
TrAIL	55		60		172		183
MAIT	58		43		157		106
Other	74		71		219		215
Total Revenues	$	371	$	341	$	1,090	$	996

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 nine months ended September 30, 2019 and 2018, by class:



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
Revenues by Customer Class	2019		2018		2019		2018
	(In millions)
Residential	$	1,538	$	1,572	$	4,145	$	4,290
Commercial	600		628		1,759		1,778
Industrial	286		276		786		792
Other	22		23		66		70
Total Revenues	$	2,446	$	2,499	$	6,756	$	6,930