v3.26.3
Contingencies and Commitments (Tables)
 9 Months Ended
Sep. 30, 2026
Site Contingency [Line Items]  
Schedule of Remediation and Other Response Activity Costs by Year CMS Energy expects to pay the following amounts for long-term leachate disposal and operating and maintenance costs during the remainder of 2026 and in each of the next five years:
In Millions
202620272028202920302031
Long-term leachate disposal and operating and maintenance costs$1 $4 $4 $4 $4 $4 
Schedule of Guarantees
Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2026:
In Millions
 
Guarantee Description
Issue DateExpiration DateMaximum ObligationCarrying Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1
variousindefinite$152 $— 
Indemnity obligations from sale of membership interests in VIEs2
variousvarious52 — 
Guarantee3
2011indefinite30 — 
Consumers
Guarantee3
2011indefinite$30 $— 
1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, including claims related to taxes. The maximum obligation amount is mostly related to an Equatorial Guinea tax claim.
2These obligations arose from the sale of membership interests in BG Solar Holdings and HL Solar Holdings to tax equity investors. NorthStar Clean Energy provided certain indemnity obligations that protect the tax equity investors against losses incurred as a result of breaches of representations and warranties under the associated limited liability company agreements. These obligations are generally capped at an amount equal to the tax equity investor’s capital contributions plus a specified return, less any distributions and tax benefits it receives, in connection with its membership interest. For further details on NorthStar Clean Energy’s ownership interest in these entities, see Note 13, Variable Interest Entities.
3This obligation comprises a guarantee provided by Consumers to the DOE in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers.
Consumers Energy Company  
Site Contingency [Line Items]  
Schedule of Remediation and Other Response Activity Costs by Year Consumers expects to pay the following amounts for remediation and other response activity costs during the remainder of 2026 and in each of the next five years:
In Millions
202620272028202920302031
Remediation and other response activity costs$1 $3 $33 $19 $3 $21 
Schedule of Guarantees
Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2026:
In Millions
 
Guarantee Description
Issue DateExpiration DateMaximum ObligationCarrying Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1
variousindefinite$152 $— 
Indemnity obligations from sale of membership interests in VIEs2
variousvarious52 — 
Guarantee3
2011indefinite30 — 
Consumers
Guarantee3
2011indefinite$30 $— 
1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, including claims related to taxes. The maximum obligation amount is mostly related to an Equatorial Guinea tax claim.
2These obligations arose from the sale of membership interests in BG Solar Holdings and HL Solar Holdings to tax equity investors. NorthStar Clean Energy provided certain indemnity obligations that protect the tax equity investors against losses incurred as a result of breaches of representations and warranties under the associated limited liability company agreements. These obligations are generally capped at an amount equal to the tax equity investor’s capital contributions plus a specified return, less any distributions and tax benefits it receives, in connection with its membership interest. For further details on NorthStar Clean Energy’s ownership interest in these entities, see Note 13, Variable Interest Entities.
3This obligation comprises a guarantee provided by Consumers to the DOE in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers.