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Stock-Based Compensation (Schedule Of Restricted Stock Activity - Granted) (Details) | 12 Months Ended
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Dec. 31, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 561,068
Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 530,234
Time-lapse awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 118,290
Time-lapse awards | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 112,128
Market-based awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 143,843
Market-based awards | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 135,638
Performance-based awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 143,843
Performance-based awards | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 135,638
Restricted stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 11,725
Restricted stock units | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 11,035
Dividends on market-based awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 15,661
Dividends on market-based awards | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 14,890
Dividends on performance-based awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 15,964
Dividends on performance-based awards | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 15,175
Dividends on restricted stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 2,142
Dividends on restricted stock units | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 2,058
Additional market-based shares based on achievement of condition |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 59,736
Additional market-based shares based on achievement of condition | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 56,505
Additional performance-based shares based on achievement of condition |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 49,864
Additional performance-based shares based on achievement of condition | Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted (in shares) | 47,167

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