Reportable Segments

3 Months Ended

Mar. 31, 2018

Reportable Segments

13: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.

CMS Energy

The reportable segments for CMS Energy are:

· electric utility, consisting of regulated activities associated with the generation, transmission, 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 in domestic independent power production, the marketing of independent power production, and the development of renewable generation

CMS Energy presents EnerBank, corporate interest and other expenses, and Consumers’ other consolidated entities within other reconciling items.

Consumers

The reportable segments for Consumers are:

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

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

Consumers’ other consolidated entities are presented within other reconciling items.

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

In Millions
Three Months Ended March 31	2018			2017
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,078		$	1,036
Gas utility			777			701
Enterprises			63			59
Other reconciling items			35			33
Total operating revenue – CMS Energy		$	1,953		$	1,829
Consumers
Operating revenue
Electric utility		$	1,078		$	1,036
Gas utility			777			701
Total operating revenue – Consumers		$	1,855		$	1,737
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	139		$	124
Gas utility			103			87
Enterprises			15			12
Other reconciling items			(16)			(24)
Total net income available to common stockholders – CMS Energy		$	241		$	199
Consumers
Net income available to common stockholder
Electric utility		$	139		$	124
Gas utility			103			87
Total net income available to common stockholder – Consumers		$	242		$	211

In Millions
	March 31, 2018			December 31, 2017
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,432		$	15,221
Gas utility1			7,244			7,080
Enterprises			165			167
Other reconciling items			37			38
Total plant, property, and equipment, gross – CMS Energy		$	22,878		$	22,506
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,432		$	15,221
Gas utility1			7,244			7,080
Other reconciling items			16			17
Total plant, property, and equipment, gross – Consumers		$	22,692		$	22,318
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,986		$	13,906
Gas utility1			6,941			7,139
Enterprises			348			342
Other reconciling items			1,593			1,663
Total assets – CMS Energy		$	22,868		$	23,050
Consumers
Total assets
Electric utility1		$	13,986		$	13,907
Gas utility1			6,941			7,139
Other reconciling items			22			53
Total assets – Consumers		$	20,949		$	21,099

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

Consumers Energy Company [Member]

Reportable Segments

13: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.

CMS Energy

The reportable segments for CMS Energy are:

· electric utility, consisting of regulated activities associated with the generation, transmission, 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 in domestic independent power production, the marketing of independent power production, and the development of renewable generation

CMS Energy presents EnerBank, corporate interest and other expenses, and Consumers’ other consolidated entities within other reconciling items.

Consumers

The reportable segments for Consumers are:

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

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

Consumers’ other consolidated entities are presented within other reconciling items.

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

In Millions
Three Months Ended March 31	2018			2017
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,078		$	1,036
Gas utility			777			701
Enterprises			63			59
Other reconciling items			35			33
Total operating revenue – CMS Energy		$	1,953		$	1,829
Consumers
Operating revenue
Electric utility		$	1,078		$	1,036
Gas utility			777			701
Total operating revenue – Consumers		$	1,855		$	1,737
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	139		$	124
Gas utility			103			87
Enterprises			15			12
Other reconciling items			(16)			(24)
Total net income available to common stockholders – CMS Energy		$	241		$	199
Consumers
Net income available to common stockholder
Electric utility		$	139		$	124
Gas utility			103			87
Total net income available to common stockholder – Consumers		$	242		$	211

In Millions
	March 31, 2018			December 31, 2017
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,432		$	15,221
Gas utility1			7,244			7,080
Enterprises			165			167
Other reconciling items			37			38
Total plant, property, and equipment, gross – CMS Energy		$	22,878		$	22,506
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,432		$	15,221
Gas utility1			7,244			7,080
Other reconciling items			16			17
Total plant, property, and equipment, gross – Consumers		$	22,692		$	22,318
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,986		$	13,906
Gas utility1			6,941			7,139
Enterprises			348			342
Other reconciling items			1,593			1,663
Total assets – CMS Energy		$	22,868		$	23,050
Consumers
Total assets
Electric utility1		$	13,986		$	13,907
Gas utility1			6,941			7,139
Other reconciling items			22			53
Total assets – Consumers		$	20,949		$	21,099

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