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Cash And Cash Equivalents (Tables)
12 Months Ended
Dec. 31, 2020
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
December 3120202019
CMS Energy, including Consumers
Cash and cash equivalents$168 $140 
Restricted cash and cash equivalents17 17 
Cash and cash equivalents, including restricted amounts$185 $157 
Consumers
Cash and cash equivalents$20 $11 
Restricted cash and cash equivalents15 17 
Cash and cash equivalents, including restricted amounts$35 $28 
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
December 3120202019
CMS Energy, including Consumers
Cash and cash equivalents$168 $140 
Restricted cash and cash equivalents17 17 
Cash and cash equivalents, including restricted amounts$185 $157 
Consumers
Cash and cash equivalents$20 $11 
Restricted cash and cash equivalents15 17 
Cash and cash equivalents, including restricted amounts$35 $28