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Cash And Cash Equivalents (Tables)
 9 Months Ended
Sep. 30, 2021
Cash and Cash Equivalents [Line Items]  
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts
Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:
In Millions
September 30, 2021December 31, 2020
CMS Energy, including Consumers
Cash and cash equivalents$102 $32 
Restricted cash and cash equivalents30 17 
Current assets held for sale104 136 
Cash and cash equivalents, including restricted amounts – CMS Energy$236 $185 
Consumers
Cash and cash equivalents$29 $20 
Restricted cash and cash equivalents26 15 
Cash and cash equivalents, including restricted amounts – Consumers$55 $35 
Consumers Energy Company  
Cash and Cash Equivalents [Line Items]  
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts
Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:
In Millions
September 30, 2021December 31, 2020
CMS Energy, including Consumers
Cash and cash equivalents$102 $32 
Restricted cash and cash equivalents30 17 
Current assets held for sale104 136 
Cash and cash equivalents, including restricted amounts – CMS Energy$236 $185 
Consumers
Cash and cash equivalents$29 $20 
Restricted cash and cash equivalents26 15 
Cash and cash equivalents, including restricted amounts – Consumers$55 $35