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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2025
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation
Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:
Three Months Ended March 3120252024
CMS Energy, including Consumers
U.S. federal income tax rate21.0 %21.0 %
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect5.3 5.5 
Renewable energy tax credits(5.7)(6.0)
TCJA excess deferred taxes
(3.4)(3.7)
Taxes attributable to noncontrolling interests0.6 1.1 
Other, net(0.2)0.2 
Effective tax rate17.6 %18.1 %
Consumers
U.S. federal income tax rate21.0 %21.0 %
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect
4.8 4.9 
Renewable energy tax credits(3.3)(4.0)
TCJA excess deferred taxes
(2.9)(3.2)
Other, net(0.3)0.2 
Effective tax rate19.3 %18.9 %
Consumers Energy Company  
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation
Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:
Three Months Ended March 3120252024
CMS Energy, including Consumers
U.S. federal income tax rate21.0 %21.0 %
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect5.3 5.5 
Renewable energy tax credits(5.7)(6.0)
TCJA excess deferred taxes
(3.4)(3.7)
Taxes attributable to noncontrolling interests0.6 1.1 
Other, net(0.2)0.2 
Effective tax rate17.6 %18.1 %
Consumers
U.S. federal income tax rate21.0 %21.0 %
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect
4.8 4.9 
Renewable energy tax credits(3.3)(4.0)
TCJA excess deferred taxes
(2.9)(3.2)
Other, net(0.3)0.2 
Effective tax rate19.3 %18.9 %