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Reportable Segments (Tables)
9 Months Ended
Sep. 30, 2018
Segment Reporting Information [Line Items]  
Schedule Of Financial Information By Reportable Segments
Presented in the following tables is financial information by reportable segment: 
In Millions
 
 
Three Months Ended
 
Nine Months Ended
September 30
2018
 
2017
 
 
2018
 
2017
 
CMS Energy, including Consumers
 
 
 
 
 
 
 
 
 
Operating revenue
 
 
 
 
 
 
 
 
 
Electric utility
 
$
1,313

 
$
1,247

 
 
$
3,480

 
$
3,360

Gas utility
 
189

 
190

 
 
1,272

 
1,176

Enterprises
 
57

 
58

 
 
181

 
172

Other reconciling items
 
40

 
32

 
 
111

 
97

Total operating revenue – CMS Energy
 
$
1,599

 
$
1,527

 
 
$
5,044

 
$
4,805

Consumers
 
 
 
 
 
 
 
 
 
Operating revenue
 
 
 
 
 
 
 
 
 
Electric utility
 
$
1,313

 
$
1,247

 
 
$
3,480

 
$
3,360

Gas utility
 
189

 
190

 
 
1,272

 
1,176

Total operating revenue – Consumers
 
$
1,502

 
$
1,437

 
 
$
4,752

 
$
4,536

CMS Energy, including Consumers
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
 


 


 
 
 
 
 
Electric utility
 
$
199

 
$
176

 
 
$
468

 
$
394

Gas utility
 
(19
)
 
5

 
 
105

 
101

Enterprises
 
4

 
8

 
 
33

 
27

Other reconciling items
 
(15
)
 
(17
)
 
 
(57
)
 
(59
)
Total net income available to common stockholders – CMS Energy
 
$
169

 
$
172

 
 
$
549

 
$
463

Consumers
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholder
 


 


 
 
 
 
 
Electric utility
 
$
199

 
$
176

 
 
$
468

 
$
394

Gas utility
 
(19
)
 
5

 
 
105

 
101

Total net income available to common stockholder – Consumers
 
$
180

 
$
181

 
 
$
573

 
$
495

In Millions
 
 
September 30, 2018
 
December 31, 2017
 
CMS Energy, including Consumers
 
 
 
 
Plant, property, and equipment, gross
 
 
 
 
Electric utility1
 
$
15,772

 
$
15,221

Gas utility1
 
7,534

 
7,080

Enterprises
 
405

 
167

Other reconciling items
 
40

 
38

Total plant, property, and equipment, gross – CMS Energy
 
$
23,751

 
$
22,506

Consumers
 
 
 
 
Plant, property, and equipment, gross
 
 
 
 
Electric utility1
 
$
15,772

 
$
15,221

Gas utility1
 
7,534

 
7,080

Other reconciling items
 
16

 
17

Total plant, property, and equipment, gross – Consumers
 
$
23,322

 
$
22,318

CMS Energy, including Consumers
 
 
 
 
Total assets
 
 
 
 
Electric utility1
 
$
13,850

 
$
13,906

Gas utility1
 
7,513

 
7,139

Enterprises
 
538

 
342

Other reconciling items
 
2,012

 
1,663

Total assets – CMS Energy
 
$
23,913

 
$
23,050

Consumers
 
 
 
 
Total assets
 
 
 
 
Electric utility1
 
$
13,914

 
$
13,907

Gas utility1
 
7,556

 
7,139

Other reconciling items
 
22

 
53

Total assets – Consumers
 
$
21,492

 
$
21,099

1 
Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
Consumers Energy Company  
Segment Reporting Information [Line Items]  
Schedule Of Financial Information By Reportable Segments
Presented in the following tables is financial information by reportable segment: 
In Millions
 
 
Three Months Ended
 
Nine Months Ended
September 30
2018
 
2017
 
 
2018
 
2017
 
CMS Energy, including Consumers
 
 
 
 
 
 
 
 
 
Operating revenue
 
 
 
 
 
 
 
 
 
Electric utility
 
$
1,313

 
$
1,247

 
 
$
3,480

 
$
3,360

Gas utility
 
189

 
190

 
 
1,272

 
1,176

Enterprises
 
57

 
58

 
 
181

 
172

Other reconciling items
 
40

 
32

 
 
111

 
97

Total operating revenue – CMS Energy
 
$
1,599

 
$
1,527

 
 
$
5,044

 
$
4,805

Consumers
 
 
 
 
 
 
 
 
 
Operating revenue
 
 
 
 
 
 
 
 
 
Electric utility
 
$
1,313

 
$
1,247

 
 
$
3,480

 
$
3,360

Gas utility
 
189

 
190

 
 
1,272

 
1,176

Total operating revenue – Consumers
 
$
1,502

 
$
1,437

 
 
$
4,752

 
$
4,536

CMS Energy, including Consumers
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
 


 


 
 
 
 
 
Electric utility
 
$
199

 
$
176

 
 
$
468

 
$
394

Gas utility
 
(19
)
 
5

 
 
105

 
101

Enterprises
 
4

 
8

 
 
33

 
27

Other reconciling items
 
(15
)
 
(17
)
 
 
(57
)
 
(59
)
Total net income available to common stockholders – CMS Energy
 
$
169

 
$
172

 
 
$
549

 
$
463

Consumers
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholder
 


 


 
 
 
 
 
Electric utility
 
$
199

 
$
176

 
 
$
468

 
$
394

Gas utility
 
(19
)
 
5

 
 
105

 
101

Total net income available to common stockholder – Consumers
 
$
180

 
$
181

 
 
$
573

 
$
495

In Millions
 
 
September 30, 2018
 
December 31, 2017
 
CMS Energy, including Consumers
 
 
 
 
Plant, property, and equipment, gross
 
 
 
 
Electric utility1
 
$
15,772

 
$
15,221

Gas utility1
 
7,534

 
7,080

Enterprises
 
405

 
167

Other reconciling items
 
40

 
38

Total plant, property, and equipment, gross – CMS Energy
 
$
23,751

 
$
22,506

Consumers
 
 
 
 
Plant, property, and equipment, gross
 
 
 
 
Electric utility1
 
$
15,772

 
$
15,221

Gas utility1
 
7,534

 
7,080

Other reconciling items
 
16

 
17

Total plant, property, and equipment, gross – Consumers
 
$
23,322

 
$
22,318

CMS Energy, including Consumers
 
 
 
 
Total assets
 
 
 
 
Electric utility1
 
$
13,850

 
$
13,906

Gas utility1
 
7,513

 
7,139

Enterprises
 
538

 
342

Other reconciling items
 
2,012

 
1,663

Total assets – CMS Energy
 
$
23,913

 
$
23,050

Consumers
 
 
 
 
Total assets
 
 
 
 
Electric utility1
 
$
13,914

 
$
13,907

Gas utility1
 
7,556

 
7,139

Other reconciling items
 
22

 
53

Total assets – Consumers
 
$
21,492

 
$
21,099

1 
Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.