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Asset Sale and Exit Activities - (Tables)
9 Months Ended
Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Schedule of Restructuring Reserve by Type of Cost Presented in the following table is a reconciliation of the retention benefit liability recorded in other liabilities on Consumers’ consolidated balance sheets:
In Millions
 
September 30, 2020
Nine Months Ended
Retention benefit liability at beginning of period
 
$
4

Costs incurred and charged to maintenance and other operating expenses¹
 
11

Costs incurred and capitalized
 
1

Retention benefit liability at the end of the period²
 
$
16

1 
Includes $4 million for the three months ended September 30, 2020.
2 
Includes current portion of other liabilities of $7 million.
Consumers Energy Company  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Schedule of Restructuring Reserve by Type of Cost Presented in the following table is a reconciliation of the retention benefit liability recorded in other liabilities on Consumers’ consolidated balance sheets:
In Millions
 
September 30, 2020
Nine Months Ended
Retention benefit liability at beginning of period
 
$
4

Costs incurred and charged to maintenance and other operating expenses¹
 
11

Costs incurred and capitalized
 
1

Retention benefit liability at the end of the period²
 
$
16

1 
Includes $4 million for the three months ended September 30, 2020.
2 
Includes current portion of other liabilities of $7 million