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Reportable Segments
 3 Months Ended
Mar. 31, 2021
Segment Reporting Information [Line Items]  
Reportable Segments Reportable SegmentsReportable 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 segments reported for CMS Energy are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
•enterprises, consisting of various subsidiaries engaging in domestic independent power production, including the development and operation of renewable generation, and the marketing of independent power production
•EnerBank, a Utah state-chartered, FDIC-insured industrial bank providing primarily unsecured, fixed-rate installment loans throughout the U.S. to finance home improvements
CMS Energy presents corporate interest and other expenses and Consumers’ other consolidated entities within other reconciling items. Beginning in 2021, CMS Land, which holds the environmental remediation obligations at Bay Harbor, will be included within other reconciling items rather than within the enterprises segment. This change was not material and was made to align segment reporting with the legal organization and internal reporting of CMS Energy.
Consumers
The segments reported for Consumers are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
Consumers’ other consolidated entities are presented within other reconciling items.
Presented in the following tables is financial information by segment:
In Millions
Three Months Ended March 3120212020
CMS Energy, including Consumers
Operating revenue
Electric utility$1,134 $1,028 
Gas utility803 716 
Enterprises76 58 
EnerBank70 62 
Total operating revenue – CMS Energy$2,083 $1,864 
Consumers
Operating revenue
Electric utility$1,134 $1,028 
Gas utility803 716 
Total operating revenue – Consumers$1,937 $1,744 
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility$155 $118 
Gas utility181 117 
Enterprises14 20 
EnerBank33 14 
Other reconciling items(34)(26)
Total net income available to common stockholders – CMS Energy$349 $243 
Consumers
Net income available to common stockholder
Electric utility$155 $118 
Gas utility181 117 
Total net income available to common stockholder – Consumers$336 $235 
In Millions
March 31, 2021December 31, 2020
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1
$17,574 $17,155 
Gas utility1
9,703 9,581 
Enterprises1,118 1,113 
EnerBank40 37 
Other reconciling items22 21 
Total plant, property, and equipment, gross – CMS Energy$28,457 $27,907 
Consumers
Plant, property, and equipment, gross
Electric utility1
$17,574 $17,155 
Gas utility1
9,703 9,581 
Other reconciling items22 21 
Total plant, property, and equipment, gross – Consumers$27,299 $26,757 
CMS Energy, including Consumers
Total assets
Electric utility1
$15,906 $15,829 
Gas utility1
9,244 9,429 
Enterprises1,275 1,276 
EnerBank3,073 3,109 
Other reconciling items225 23 
Total assets – CMS Energy$29,723 $29,666 
Consumers
Total assets
Electric utility1
$15,969 $15,893 
Gas utility1
9,292 9,477 
Other reconciling items19 29 
Total assets – Consumers$25,280 $25,399 
1Amounts 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]  
Reportable Segments Reportable SegmentsReportable 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 segments reported for CMS Energy are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
•enterprises, consisting of various subsidiaries engaging in domestic independent power production, including the development and operation of renewable generation, and the marketing of independent power production
•EnerBank, a Utah state-chartered, FDIC-insured industrial bank providing primarily unsecured, fixed-rate installment loans throughout the U.S. to finance home improvements
CMS Energy presents corporate interest and other expenses and Consumers’ other consolidated entities within other reconciling items. Beginning in 2021, CMS Land, which holds the environmental remediation obligations at Bay Harbor, will be included within other reconciling items rather than within the enterprises segment. This change was not material and was made to align segment reporting with the legal organization and internal reporting of CMS Energy.
Consumers
The segments reported for Consumers are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
Consumers’ other consolidated entities are presented within other reconciling items.
Presented in the following tables is financial information by segment:
In Millions
Three Months Ended March 3120212020
CMS Energy, including Consumers
Operating revenue
Electric utility$1,134 $1,028 
Gas utility803 716 
Enterprises76 58 
EnerBank70 62 
Total operating revenue – CMS Energy$2,083 $1,864 
Consumers
Operating revenue
Electric utility$1,134 $1,028 
Gas utility803 716 
Total operating revenue – Consumers$1,937 $1,744 
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility$155 $118 
Gas utility181 117 
Enterprises14 20 
EnerBank33 14 
Other reconciling items(34)(26)
Total net income available to common stockholders – CMS Energy$349 $243 
Consumers
Net income available to common stockholder
Electric utility$155 $118 
Gas utility181 117 
Total net income available to common stockholder – Consumers$336 $235 
In Millions
March 31, 2021December 31, 2020
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1
$17,574 $17,155 
Gas utility1
9,703 9,581 
Enterprises1,118 1,113 
EnerBank40 37 
Other reconciling items22 21 
Total plant, property, and equipment, gross – CMS Energy$28,457 $27,907 
Consumers
Plant, property, and equipment, gross
Electric utility1
$17,574 $17,155 
Gas utility1
9,703 9,581 
Other reconciling items22 21 
Total plant, property, and equipment, gross – Consumers$27,299 $26,757 
CMS Energy, including Consumers
Total assets
Electric utility1
$15,906 $15,829 
Gas utility1
9,244 9,429 
Enterprises1,275 1,276 
EnerBank3,073 3,109 
Other reconciling items225 23 
Total assets – CMS Energy$29,723 $29,666 
Consumers
Total assets
Electric utility1
$15,969 $15,893 
Gas utility1
9,292 9,477 
Other reconciling items19 29 
Total assets – Consumers$25,280 $25,399 
1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.