Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Schedule Of Segment Reporting Information By Segment

The following tables present revenues, net income attributable to common shareholders, and capital expenditures by segment at Ameren and Ameren Illinois for the three and six months ended June 30, 2019 and 2018. Ameren, Ameren Missouri, and Ameren Illinois management review segment capital expenditure information rather than any individual or total asset amount.

Ameren



	Ameren Missouri		Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Transmission			Other			Intersegment Eliminations			Ameren
Three Months 2019:
External revenues	$	790	$	358	$	136	$	95		$	—		$	—		$	1,379
Intersegment revenues	8		1		—		14			—			(23		)	—
Net income attributable to Ameren common shareholders	107		37		1		42		^(a)	(8		)	—			179
Capital expenditures	255		127		77		127			—			(5		)	581
Three Months 2018:
External revenues	$	946	$	386	$	142	$	89		$	—		$	—		$	1,563
Intersegment revenues	9		1		—		14			—			(24		)	—
Net income attributable to Ameren common shareholders	168		33		7		36		^(a)	(5		)	—			239
Capital expenditures	205		132		66		130			(2		)	2			533
Six Months 2019:
External revenues	$	1,541	$	744	$	456	$	194		$	—		$	—		$	2,935
Intersegment revenues	15		2		—		29			—			(46		)	—
Net income attributable to Ameren common shareholders	146		73		58		86		^(a)	7			—			370
Capital expenditures	495		251		128		248			10			(7		)	1,125
Six Months 2018:
External revenues	$	1,730	$	785	$	453	$	180		$	—		$	—		$	3,148
Intersegment revenues	17		2		—		27			—			(46		)	—
Net income attributable to Ameren common shareholders	206		66		49		73		^(a)	(4		)	—			390
Capital expenditures	454		254		126		275			5			(2		)	1,112


(a)	Ameren Transmission earnings include an allocation of financing costs from Ameren (parent).

Ameren Illinois



	Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Illinois Transmission		Intersegment Eliminations			Ameren Illinois
Three Months 2019:
External revenues	$	359	$	136	$	52	$	—		$	547
Intersegment revenues	—		—		14		(14		)	—
Net income available to common shareholder	37		1		24		—			62
Capital expenditures	127		77		85		—			289
Three Months 2018:
External revenues	$	387	$	142	$	49	$	—		$	578
Intersegment revenues	—		—		13		(13		)	—
Net income available to common shareholder	33		7		22		—			62
Capital expenditures	132		66		104		—			302
Six Months 2019:
External revenues	$	746	$	456	$	107	$	—		$	1,309
Intersegment revenues	—		—		29		(29		)	—
Net income available to common shareholder	73		58		51		—			182
Capital expenditures	251		128		177		—			556
Six Months 2018:
External revenues	$	787	$	453	$	98	$	—		$	1,338
Intersegment revenues	—		—		26		(26		)	—
Net income available to common shareholder	66		49		42		—			157
Capital expenditures	254		126		222		—			602

Disaggregation of Revenue

The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the three and six months ended June 30, 2019 and 2018. Economic factors affect the nature, timing, amount, and uncertainty of revenues and cash flows in a similar manner across customer classes. Revenues from alternative revenue programs have a similar distribution among customer classes as revenues from contracts with customers. Other revenues not associated with contracts with customers are presented in the Other customer classification, along with electric transmission and off-system revenues.

Ameren



	Ameren Missouri			Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Transmission		Intersegment Eliminations			Ameren
Three Months 2019:
Residential	$	333		$	199	$	—	$	—	$	—		$	532
Commercial	310			124		—		—		—			434
Industrial	77			33		—		—		—			110
Other	53			3		—		109		(23		)	142
Total electric revenues	$	773		$	359	$	—	$	109	$	(23	)	$	1,218
Residential	$	10		$	—	$	88	$	—	$	—		$	98
Commercial	4			—		23		—		—			27
Industrial	—			—		3		—		—			3
Other	11			—		22		—		—			33
Total gas revenues	$	25		$	—	$	136	$	—	$	—		$	161
Total revenues^(b)	$	798		$	359	$	136	$	109	$	(23	)	$	1,379
Three Months 2018:
Residential	$	432		$	221	$	—	$	—	$	—		$	653
Commercial	364			126		—		—		—			490
Industrial	87			33		—		—		—			120
Other	47		^(a)	7		—		103		(24		)	133		^(a)
Total electric revenues	$	930		$	387	$	—	$	103	$	(24	)	$	1,396
Residential	$	13		$	—	$	97	$	—	$	—		$	110
Commercial	6			—		26		—		—			32
Industrial	—			—		5		—		—			5
Other	6			—		14		—		—			20
Total gas revenues	$	25		$	—	$	142	$	—	$	—		$	167
Total revenues^(b)	$	955		$	387	$	142	$	103	$	(24	)	$	1,563



	Ameren Missouri				Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Transmission		Intersegment Eliminations			Ameren
Six Months 2019:
Residential	$	645			$	416	$	—	$	—	$	—		$	1,061
Commercial	549				247		—		—		—			796
Industrial	132				67		—		—		—			199
Other	151				16		—		223		(46		)	344
Total electric revenues	$	1,477			$	746	$	—	$	223	$	(46	)	$	2,400
Residential	$	48			$	—	$	334	$	—	$	—		$	382
Commercial	20				—		88		—		—			108
Industrial	2				—		7		—		—			9
Other	9				—		27		—		—			36
Total gas revenues	$	79			$	—	$	456	$	—	$	—		$	535
Total revenues^(b)	$	1,556			$	746	$	456	$	223	$	(46	)	$	2,935
Six Months 2018:
Residential	$	764			$	440	$	—	$	—	$	—		$	1,204
Commercial	616				250		—		—		—			866
Industrial	148				68		—		—		—			216
Other	143			^(a)	29		—		207		(46		)	333		^(a)
Total electric revenues	$	1,671			$	787	$	—	$	207	$	(46	)	$	2,619
Residential	$	54			$	—	$	340	$	—	$	—		$	394
Commercial	22				—		93		—		—			115
Industrial	2				—		11		—		—			13
Other	(2		)		—		9		—		—			7
Total gas revenues	$	76			$	—	$	453	$	—	$	—		$	529
Total revenues^(b)	$	1,747			$	787	$	453	$	207	$	(46	)	$	3,148


(a)	Includes $37 million and $47 million for the three and six months ended June 30, 2018, respectively, for the reduction to revenue for the excess amounts collected in rates related to the TCJA from January 1, 2018, through June 30, 2018. See Note 2 – Rate and Regulatory Matters under Part II, Item 8, of the Form 10-K for additional information.


(b)	The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the three and six months ended June 30, 2019 and 2018:



	Ameren Missouri			Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas			Ameren Transmission			Ameren
Three Months 2019:
Revenues from alternative revenue programs	$	—		$	12	$	4		$	(8	)	$	8
Other revenues not from contracts with customers	4			1		—			—			5
Three Months 2018:
Revenues from alternative revenue programs	$	(5	)	$	15	$	(5	)	$	(5	)	$	—
Other revenues not from contracts with customers	5			3		—			—			8
Six Months 2019:
Revenues from alternative revenue programs	$	15		$	34	$	1		$	(13	)	$	37
Other revenues not from contracts with customers	9			4		1			—			14
Six Months 2018:
Revenues from alternative revenue programs	$	(9	)	$	46	$	(8	)	$	(9	)	$	20
Other revenues not from contracts with customers	19			13		1			—			33

Ameren Illinois



	Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Illinois Transmission		Intersegment Eliminations			Ameren Illinois
Three Months 2019:
Residential	$	199	$	88	$	—	$	—		$	287
Commercial	124		23		—		—			147
Industrial	33		3		—		—			36
Other	3		22		66		(14		)	77
Total revenues^(a)	$	359	$	136	$	66	$	(14	)	$	547
Three Months 2018:
Residential	$	221	$	97	$	—	$	—		$	318
Commercial	126		26		—		—			152
Industrial	33		5		—		—			38
Other	7		14		62		(13		)	70
Total revenues^(a)	$	387	$	142	$	62	$	(13	)	$	578
Six Months 2019:
Residential	$	416	$	334	$	—	$	—		$	750
Commercial	247		88		—		—			335
Industrial	67		7		—		—			74
Other	16		27		136		(29		)	150
Total revenues^(a)	$	746	$	456	$	136	$	(29	)	$	1,309
Six Months 2018:
Residential	$	440	$	340	$	—	$	—		$	780
Commercial	250		93		—		—			343
Industrial	68		11		—		—			79
Other	29		9		124		(26		)	136
Total revenues^(a)	$	787	$	453	$	124	$	(26	)	$	1,338


(a)	The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the Ameren Illinois segments for the three and six months ended June 30, 2019 and 2018:



	Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas			Ameren Illinois Transmission			Ameren Illinois
Three Months 2019:
Revenues from alternative revenue programs	$	12	$	4		$	(9	)	$	7
Other revenues not from contracts with customers	1		—			—			1
Three Months 2018:
Revenues from alternative revenue programs	$	15	$	(5	)	$	(5	)	$	5
Other revenues not from contracts with customers	3		—			—			3
Six Months 2019:
Revenues from alternative revenue programs	$	34	$	1		$	(14	)	$	21
Other revenues not from contracts with customers	4		1			—			5
Six Months 2018:
Revenues from alternative revenue programs	$	46	$	(8	)	$	(9	)	$	29
Other revenues not from contracts with customers	13		1			—			14