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Reportable Segments
 12 Months Ended
Dec. 31, 2020
Segment Reporting Information [Line Items]  
Reportable Segments 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.
Accounting policies for CMS Energy’s and Consumers’ segments are as described in Note 1, Significant Accounting Policies. The consolidated financial statements reflect the assets, liabilities, revenues, and expenses of the individual segments when appropriate. Accounts are allocated among the segments when common accounts are attributable to more than one segment. The allocations are based on certain measures of business activities, such as revenue, labor dollars, customers, other operating and maintenance expense, construction expense, leased property, taxes, or functional surveys. For example, customer receivables are allocated based on revenue, and pension provisions are allocated based on labor dollars.
Inter-segment sales and transfers are accounted for at current market prices and are eliminated in consolidated net income available to common stockholders by segment.
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.
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
Years Ended December 312020 2019 2018 
CMS Energy, including Consumers
Operating revenue
Electric utility$4,372 $4,439 $4,561 
Gas utility1,817 1,937 1,903 
Enterprises229 248 252 
EnerBank262 221 157 
Total operating revenue – CMS Energy$6,680 $6,845 $6,873 
Consumers
Operating revenue
Electric utility$4,372 $4,439 $4,561 
Gas utility1,817 1,937 1,903 
Total operating revenue – Consumers$6,189 $6,376 $6,464 
CMS Energy, including Consumers
Depreciation and amortization
Electric utility$739 $713 $682 
Gas utility283 261 239 
Enterprises20 14 8 
EnerBank5 3 4 
Other reconciling items1 1 — 
Total depreciation and amortization – CMS Energy$1,048 $992 $933 
Consumers
Depreciation and amortization
Electric utility$739 $713 $682 
Gas utility283 261 239 
Other reconciling items1 1 — 
Total depreciation and amortization – Consumers$1,023 $975 $921 
CMS Energy, including Consumers
Income from equity method investees1
Enterprises$5 $10 $9 
Total income from equity method investees – CMS Energy$5 $10 $9 
CMS Energy, including Consumers
Interest charges
Electric utility$217 $213 $209 
Gas utility102 83 79 
Enterprises7 7 2 
EnerBank56 59 32 
Other reconciling items179 157 136 
Total interest charges – CMS Energy$561 $519 $458 
In Millions
Years Ended December 312020 2019 2018 
Consumers
Interest charges
Electric utility$217 $213 $209 
Gas utility102 83 79 
Other reconciling items1 1 1 
Total interest charges – Consumers$320 $297 $289 
CMS Energy, including Consumers
Income tax expense (benefit)
Electric utility$115 $134 $109 
Gas utility58 51 33 
Enterprises(4)2 2 
EnerBank17 16 12 
Other reconciling items(53)(56)(41)
Total income tax expense – CMS Energy$133 $147 $115 
Consumers
Income tax expense
Electric utility$115 $134 $109 
Gas utility58 51 33 
Total income tax expense – Consumers$173 $185 $142 
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility$554 $509 $535 
Gas utility261 233 169 
Enterprises36 33 34 
EnerBank58 49 38 
Other reconciling items(154)(144)(119)
Total net income available to common stockholders – CMS Energy$755 $680 $657 
Consumers
Net income (loss) available to common stockholder
Electric utility$554 $509 $535 
Gas utility261 233 169 
Other reconciling items(1)(1)(1)
Total net income available to common stockholder – Consumers$814 $741 $703 
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility2,3
$17,155 $16,158 $16,027 
Gas utility2
9,581 8,785 7,919 
Enterprises1,113 405 412 
EnerBank37 22 25 
Other reconciling items21 20 17 
Total plant, property, and equipment, gross – CMS Energy$27,907 $25,390 $24,400 
In Millions
Years Ended December 312020 2019 2018 
Consumers
Plant, property, and equipment, gross
Electric utility2,3
$17,155 $16,158 $16,027 
Gas utility2
9,581 8,785 7,919 
Other reconciling items21 20 17 
Total plant, property, and equipment, gross – Consumers$26,757 $24,963 $23,963 
CMS Energy, including Consumers
Investments in equity method investees1
Enterprises$70 $71 $69 
Total investments in equity method investees – CMS Energy$70 $71 $69 
CMS Energy, including Consumers
Total assets
Electric utility2
$15,829 $14,911 $14,079 
Gas utility2
9,429 8,659 7,806 
Enterprises1,276 527 540 
EnerBank3,109 2,692 2,006 
Other reconciling items23 48 98 
Total assets – CMS Energy$29,666 $26,837 $24,529 
Consumers
Total assets
Electric utility2
$15,893 $14,973 $14,143 
Gas utility2
9,477 8,706 7,853 
Other reconciling items29 20 29 
Total assets – Consumers$25,399 $23,699 $22,025 
CMS Energy, including Consumers
Capital expenditures4
Electric utility5
$1,281 $1,162 $865 
Gas utility5
885 971 958 
Enterprises108 5 246 
EnerBank5 8 10 
Other reconciling items1 1 2 
Total capital expenditures – CMS Energy$2,280 $2,147 $2,081 
Consumers
Capital expenditures4
Electric utility5
$1,281 $1,162 $865 
Gas utility5
885 971 958 
Other reconciling items1 1 2 
Total capital expenditures – Consumers$2,167 $2,134 $1,825 
1Consumers had no significant equity method investments.
2Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
3Costs related to coal-fueled electric generating units to be retired in 2023 were removed and recorded as a regulatory asset in June 2019. For additional details, see Note 3, Regulatory Matters.
4Amounts include assets placed under finance lease.
5Amounts include a portion of Consumers’ capital expenditures for plant and equipment attributable to both the electric and gas utility businesses.
Consumers Energy Company  
Segment Reporting Information [Line Items]  
Reportable Segments 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.
Accounting policies for CMS Energy’s and Consumers’ segments are as described in Note 1, Significant Accounting Policies. The consolidated financial statements reflect the assets, liabilities, revenues, and expenses of the individual segments when appropriate. Accounts are allocated among the segments when common accounts are attributable to more than one segment. The allocations are based on certain measures of business activities, such as revenue, labor dollars, customers, other operating and maintenance expense, construction expense, leased property, taxes, or functional surveys. For example, customer receivables are allocated based on revenue, and pension provisions are allocated based on labor dollars.
Inter-segment sales and transfers are accounted for at current market prices and are eliminated in consolidated net income available to common stockholders by segment.
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.
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
Years Ended December 312020 2019 2018 
CMS Energy, including Consumers
Operating revenue
Electric utility$4,372 $4,439 $4,561 
Gas utility1,817 1,937 1,903 
Enterprises229 248 252 
EnerBank262 221 157 
Total operating revenue – CMS Energy$6,680 $6,845 $6,873 
Consumers
Operating revenue
Electric utility$4,372 $4,439 $4,561 
Gas utility1,817 1,937 1,903 
Total operating revenue – Consumers$6,189 $6,376 $6,464 
CMS Energy, including Consumers
Depreciation and amortization
Electric utility$739 $713 $682 
Gas utility283 261 239 
Enterprises20 14 8 
EnerBank5 3 4 
Other reconciling items1 1 — 
Total depreciation and amortization – CMS Energy$1,048 $992 $933 
Consumers
Depreciation and amortization
Electric utility$739 $713 $682 
Gas utility283 261 239 
Other reconciling items1 1 — 
Total depreciation and amortization – Consumers$1,023 $975 $921 
CMS Energy, including Consumers
Income from equity method investees1
Enterprises$5 $10 $9 
Total income from equity method investees – CMS Energy$5 $10 $9 
CMS Energy, including Consumers
Interest charges
Electric utility$217 $213 $209 
Gas utility102 83 79 
Enterprises7 7 2 
EnerBank56 59 32 
Other reconciling items179 157 136 
Total interest charges – CMS Energy$561 $519 $458 
In Millions
Years Ended December 312020 2019 2018 
Consumers
Interest charges
Electric utility$217 $213 $209 
Gas utility102 83 79 
Other reconciling items1 1 1 
Total interest charges – Consumers$320 $297 $289 
CMS Energy, including Consumers
Income tax expense (benefit)
Electric utility$115 $134 $109 
Gas utility58 51 33 
Enterprises(4)2 2 
EnerBank17 16 12 
Other reconciling items(53)(56)(41)
Total income tax expense – CMS Energy$133 $147 $115 
Consumers
Income tax expense
Electric utility$115 $134 $109 
Gas utility58 51 33 
Total income tax expense – Consumers$173 $185 $142 
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility$554 $509 $535 
Gas utility261 233 169 
Enterprises36 33 34 
EnerBank58 49 38 
Other reconciling items(154)(144)(119)
Total net income available to common stockholders – CMS Energy$755 $680 $657 
Consumers
Net income (loss) available to common stockholder
Electric utility$554 $509 $535 
Gas utility261 233 169 
Other reconciling items(1)(1)(1)
Total net income available to common stockholder – Consumers$814 $741 $703 
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility2,3
$17,155 $16,158 $16,027 
Gas utility2
9,581 8,785 7,919 
Enterprises1,113 405 412 
EnerBank37 22 25 
Other reconciling items21 20 17 
Total plant, property, and equipment, gross – CMS Energy$27,907 $25,390 $24,400 
In Millions
Years Ended December 312020 2019 2018 
Consumers
Plant, property, and equipment, gross
Electric utility2,3
$17,155 $16,158 $16,027 
Gas utility2
9,581 8,785 7,919 
Other reconciling items21 20 17 
Total plant, property, and equipment, gross – Consumers$26,757 $24,963 $23,963 
CMS Energy, including Consumers
Investments in equity method investees1
Enterprises$70 $71 $69 
Total investments in equity method investees – CMS Energy$70 $71 $69 
CMS Energy, including Consumers
Total assets
Electric utility2
$15,829 $14,911 $14,079 
Gas utility2
9,429 8,659 7,806 
Enterprises1,276 527 540 
EnerBank3,109 2,692 2,006 
Other reconciling items23 48 98 
Total assets – CMS Energy$29,666 $26,837 $24,529 
Consumers
Total assets
Electric utility2
$15,893 $14,973 $14,143 
Gas utility2
9,477 8,706 7,853 
Other reconciling items29 20 29 
Total assets – Consumers$25,399 $23,699 $22,025 
CMS Energy, including Consumers
Capital expenditures4
Electric utility5
$1,281 $1,162 $865 
Gas utility5
885 971 958 
Enterprises108 5 246 
EnerBank5 8 10 
Other reconciling items1 1 2 
Total capital expenditures – CMS Energy$2,280 $2,147 $2,081 
Consumers
Capital expenditures4
Electric utility5
$1,281 $1,162 $865 
Gas utility5
885 971 958 
Other reconciling items1 1 2 
Total capital expenditures – Consumers$2,167 $2,134 $1,825 
1Consumers had no significant equity method investments.
2Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
3Costs related to coal-fueled electric generating units to be retired in 2023 were removed and recorded as a regulatory asset in June 2019. For additional details, see Note 3, Regulatory Matters.
4Amounts include assets placed under finance lease.
5Amounts include a portion of Consumers’ capital expenditures for plant and equipment attributable to both the electric and gas utility businesses.