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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Restricted Stock Activity | Presented in the following tables is the activity for restricted stock and restricted stock units under the PISP:
| CMS Energy, including Consumers |  | Consumers
Year Ended December 31, 2021 | Number of Shares | Weighted-Average Grant Date Fair Value per Share |  | Number of Shares | Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period | 817,357 |  |  | $ | 51.68 |  |  | 781,531 |  |  | $ | 51.73 |
Granted |  |  |  |  |  |  |
Restricted stock | 547,201 |  |  | 43.52 |  |  | 517,141 |  |  | 42.85 |
Restricted stock units | 13,867 |  |  | 54.11 |  |  | 13,093 |  |  | 53.93 |
Vested |  |  |  |  |  |  |
Restricted stock | (408,011) |  |  | 29.46 |  |  | (388,009) |  |  | 29.55 |
Restricted stock units | (15,577) |  |  | 48.15 |  |  | (14,891) |  |  | 48.09 |
Forfeited – restricted stock | (22,264) |  |  | 57.90 |  |  | (21,780) |  |  | 58.01 |
Nonvested at end of period | 932,573 |  |  | $ | 56.56 |  |  | 887,085 |  |  | $ | 56.19 |
Year Ended December 31, 2021 | CMS Energy, including Consumers | Consumers
Granted |  |
Time-lapse awards | 118,290 |  | 112,128 |
Market-based awards | 143,843 |  | 135,638 |
Performance-based awards | 143,843 |  | 135,638 |
Restricted stock units | 11,725 |  | 11,035 |
Dividends on market-based awards | 15,661 |  | 14,890 |
Dividends on performance-based awards | 15,964 |  | 15,175 |
Dividends on restricted stock units | 2,142 |  | 2,058 |
Additional market-based shares based on achievement of condition | 59,736 |  | 56,505 |
Additional performance-based shares based on achievement of condition | 49,864 |  | 47,167 |
Total granted | 561,068 |  | 530,234 |
Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions | Presented in the following table are the most significant assumptions used to estimate the fair value of the market-based restricted stock awards:
Years Ended December 31 | 2021 | 2020 | 2019
Expected volatility | 27.6 | % | 14.2 | % | 14.9 | %
Expected dividend yield | 2.8 |  | 2.4 |  | 2.8 |
Risk-free rate | 0.2 |  | 1.6 |  | 2.5 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | Presented in the following table is the weighted-average grant-date fair value of all awards under the PISP:
In Millions
Years Ended December 31 | 2021 | 2020 | 2019
CMS Energy, including Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 43.52 |  |  | $ | 45.56 |  |  | $ | 43.57 |
Restricted stock units granted |  | 54.11 |  |  | 49.76 |  |  | 50.35 |
Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 42.85 |  |  | $ | 45.53 |  |  | $ | 43.57 |
Restricted stock units granted |  | 53.93 |  |  | 49.70 |  |  | 51.15 |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | Presented in the following table are amounts related to restricted stock awards and restricted stock units:
In Millions
Years Ended December 31 | 2021 | 2020 | 2019
CMS Energy, including Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 25 |  |  | $ | 22 |  |  | $ | 26 |
Compensation expense recognized |  | 22 |  |  | 11 |  |  | 22 |
Income tax benefit recognized |  | 1 |  |  | 3 |  |  | 1 |
Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 24 |  |  | $ | 21 |  |  | $ | 25 |
Compensation expense recognized |  | 21 |  |  | 10 |  |  | 21 |
Income tax benefit recognized |  | 1 |  |  | 3 |  |  | 1 |
Consumers Energy Company |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Restricted Stock Activity | Presented in the following tables is the activity for restricted stock and restricted stock units under the PISP:
| CMS Energy, including Consumers |  | Consumers
Year Ended December 31, 2021 | Number of Shares | Weighted-Average Grant Date Fair Value per Share |  | Number of Shares | Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period | 817,357 |  |  | $ | 51.68 |  |  | 781,531 |  |  | $ | 51.73 |
Granted |  |  |  |  |  |  |
Restricted stock | 547,201 |  |  | 43.52 |  |  | 517,141 |  |  | 42.85 |
Restricted stock units | 13,867 |  |  | 54.11 |  |  | 13,093 |  |  | 53.93 |
Vested |  |  |  |  |  |  |
Restricted stock | (408,011) |  |  | 29.46 |  |  | (388,009) |  |  | 29.55 |
Restricted stock units | (15,577) |  |  | 48.15 |  |  | (14,891) |  |  | 48.09 |
Forfeited – restricted stock | (22,264) |  |  | 57.90 |  |  | (21,780) |  |  | 58.01 |
Nonvested at end of period | 932,573 |  |  | $ | 56.56 |  |  | 887,085 |  |  | $ | 56.19 |
Year Ended December 31, 2021 | CMS Energy, including Consumers | Consumers
Granted |  |
Time-lapse awards | 118,290 |  | 112,128 |
Market-based awards | 143,843 |  | 135,638 |
Performance-based awards | 143,843 |  | 135,638 |
Restricted stock units | 11,725 |  | 11,035 |
Dividends on market-based awards | 15,661 |  | 14,890 |
Dividends on performance-based awards | 15,964 |  | 15,175 |
Dividends on restricted stock units | 2,142 |  | 2,058 |
Additional market-based shares based on achievement of condition | 59,736 |  | 56,505 |
Additional performance-based shares based on achievement of condition | 49,864 |  | 47,167 |
Total granted | 561,068 |  | 530,234 |
Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions | Presented in the following table are the most significant assumptions used to estimate the fair value of the market-based restricted stock awards:
Years Ended December 31 | 2021 | 2020 | 2019
Expected volatility | 27.6 | % | 14.2 | % | 14.9 | %
Expected dividend yield | 2.8 |  | 2.4 |  | 2.8 |
Risk-free rate | 0.2 |  | 1.6 |  | 2.5 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | Presented in the following table is the weighted-average grant-date fair value of all awards under the PISP:
In Millions
Years Ended December 31 | 2021 | 2020 | 2019
CMS Energy, including Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 43.52 |  |  | $ | 45.56 |  |  | $ | 43.57 |
Restricted stock units granted |  | 54.11 |  |  | 49.76 |  |  | 50.35 |
Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 42.85 |  |  | $ | 45.53 |  |  | $ | 43.57 |
Restricted stock units granted |  | 53.93 |  |  | 49.70 |  |  | 51.15 |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | Presented in the following table are amounts related to restricted stock awards and restricted stock units:
In Millions
Years Ended December 31 | 2021 | 2020 | 2019
CMS Energy, including Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 25 |  |  | $ | 22 |  |  | $ | 26 |
Compensation expense recognized |  | 22 |  |  | 11 |  |  | 22 |
Income tax benefit recognized |  | 1 |  |  | 3 |  |  | 1 |
Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 24 |  |  | $ | 21 |  |  | $ | 25 |
Compensation expense recognized |  | 21 |  |  | 10 |  |  | 21 |
Income tax benefit recognized |  | 1 |  |  | 3 |  |  | 1 |

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