Reportable Segments

6 Months Ended

Jun. 30, 2011

Reportable Segments

12: REPORTABLE SEGMENTS

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy's common stockholders. The reportable segments for CMS Energy and Consumers are:

CMS Energy:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan;

• enterprises, consisting of various subsidiaries engaging primarily in domestic independent power production; and

• other, including EnerBank, corporate interest and other expenses, and discontinued operations.

Consumers:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan; and

• other, including a consolidated special-purpose entity for the sale of accounts receivable.

Presented in the following tables is financial information by reportable segment:

In Millions
	Three Months Ended						Six Months Ended
June 30	2011			2010			2011			2010
Operating Revenue
CMS Energy, including Consumers
Electric utility	$	949		$	975		$	1,846		$	1,813
Gas utility		354			301			1,445			1,353
Enterprises		50			55			105			123
Other		11			9			23			18
Total Operating Revenue — CMS Energy	$	1,364		$	1,340		$	3,419		$	3,307
Consumers
Electric utility	$	949		$	975		$	1,846		$	1,813
Gas utility		354			301			1,445			1,353
Total Operating Revenue — Consumers	$	1,303		$	1,276		$	3,291		$	3,166
Net Income Available to Common Stockholders
CMS Energy, including Consumers
Electric utility	$	85		$	86		$	150		$	127
Gas utility		5			1			93			67
Enterprises		29			33			32			42
Discontinued operations		—			(16	)		2			(17	)
Other		(19	)		(24	)		(42	)		(54	)
Total Net Income Available to Common Stockholders — CMS Energy	$	100		$	80		$	235		$	165
Consumers
Electric utility	$	85		$	86		$	150		$	127
Gas utility		5			1			93			67
Other		1			—			1			—
Total Net Income Available to Common Stockholder — Consumers	$	91		$	87		$	244		$	194

In Millions
	June 30, 2011		December 31, 2010
Plant, Property, and Equipment, Gross
CMS Energy, including Consumers
Electric utility1	$	10,184	$	9,944
Gas utility1		4,086		4,063
Enterprises		106		102
Other		37		36
Total Plant, Property, and Equipment, Gross — CMS Energy	$	14,413	$	14,145
Consumers
Electric utility1	$	10,184	$	9,944
Gas utility1		4,086		4,063
Other		15		15
Total Plant, Property, and Equipment, Gross — Consumers	$	14,285	$	14,022
Assets
CMS Energy, including Consumers
Electric utility1	$	9,831	$	9,321
Gas utility1		4,581		4,614
Enterprises		175		191
Other		1,358		1,490
Total Assets — CMS Energy	$	15,945	$	15,616
Consumers
Electric utility1	$	9,831	$	9,321
Gas utility1		4,581		4,614
Other		689		904
Total Assets — Consumers	$	15,101	$	14,839

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

76

Consumers Energy Company [Member]

Reportable Segments

12: REPORTABLE SEGMENTS

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy's common stockholders. The reportable segments for CMS Energy and Consumers are:

CMS Energy:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan;

• enterprises, consisting of various subsidiaries engaging primarily in domestic independent power production; and

• other, including EnerBank, corporate interest and other expenses, and discontinued operations.

Consumers:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan; and

• other, including a consolidated special-purpose entity for the sale of accounts receivable.

Presented in the following tables is financial information by reportable segment:

In Millions
	Three Months Ended						Six Months Ended
June 30	2011			2010			2011			2010
Operating Revenue
CMS Energy, including Consumers
Electric utility	$	949		$	975		$	1,846		$	1,813
Gas utility		354			301			1,445			1,353
Enterprises		50			55			105			123
Other		11			9			23			18
Total Operating Revenue — CMS Energy	$	1,364		$	1,340		$	3,419		$	3,307
Consumers
Electric utility	$	949		$	975		$	1,846		$	1,813
Gas utility		354			301			1,445			1,353
Total Operating Revenue — Consumers	$	1,303		$	1,276		$	3,291		$	3,166
Net Income Available to Common Stockholders
CMS Energy, including Consumers
Electric utility	$	85		$	86		$	150		$	127
Gas utility		5			1			93			67
Enterprises		29			33			32			42
Discontinued operations		—			(16	)		2			(17	)
Other		(19	)		(24	)		(42	)		(54	)
Total Net Income Available to Common Stockholders — CMS Energy	$	100		$	80		$	235		$	165
Consumers
Electric utility	$	85		$	86		$	150		$	127
Gas utility		5			1			93			67
Other		1			—			1			—
Total Net Income Available to Common Stockholder — Consumers	$	91		$	87		$	244		$	194

In Millions
	June 30, 2011		December 31, 2010
Plant, Property, and Equipment, Gross
CMS Energy, including Consumers
Electric utility1	$	10,184	$	9,944
Gas utility1		4,086		4,063
Enterprises		106		102
Other		37		36
Total Plant, Property, and Equipment, Gross — CMS Energy	$	14,413	$	14,145
Consumers
Electric utility1	$	10,184	$	9,944
Gas utility1		4,086		4,063
Other		15		15
Total Plant, Property, and Equipment, Gross — Consumers	$	14,285	$	14,022
Assets
CMS Energy, including Consumers
Electric utility1	$	9,831	$	9,321
Gas utility1		4,581		4,614
Enterprises		175		191
Other		1,358		1,490
Total Assets — CMS Energy	$	15,945	$	15,616
Consumers
Electric utility1	$	9,831	$	9,321
Gas utility1		4,581		4,614
Other		689		904
Total Assets — Consumers	$	15,101	$	14,839

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