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Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
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, 2023 | 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 | 1,029,523 |  |  | $ | 60.13 |  |  | 978,146 |  |  | $ | 60.15 |
Granted |  |  |  |  |  |  |
Restricted stock | 502,039 |  |  | 52.62 |  |  | 474,917 |  |  | 52.42 |
Restricted stock units | 19,082 |  |  | 50.32 |  |  | 18,315 |  |  | 50.34 |
Vested |  |  |  |  |  |  |
Restricted stock | (313,344) |  |  | 51.54 |  |  | (302,177) |  |  | 51.48 |
Restricted stock units | (15,211) |  |  | 52.60 |  |  | (14,523) |  |  | 52.55 |
Forfeited – restricted stock | (63,987) |  |  | 53.57 |  |  | (60,312) |  |  | 53.45 |
Nonvested at end of period | 1,158,102 |  |  | $ | 59.50 |  |  | 1,094,366 |  |  | $ | 59.50 |
Year Ended December 31, 2023 | CMS Energy, including Consumers | Consumers
Granted |  |
Time-lapse awards | 115,591 |  | 108,216 |
Market-based awards | 147,453 |  | 139,255 |
Performance-based awards | 153,383 |  | 145,008 |
Restricted stock units | 15,545 |  | 14,925 |
Dividends on market-based awards | 14,825 |  | 14,038 |
Dividends on performance-based awards | 15,608 |  | 14,787 |
Dividends on restricted stock units | 3,537 |  | 3,390 |
Additional performance-based shares based on achievement of condition | 55,179 |  | 53,613 |
Total granted | 521,121 |  | 493,232 |
Schedule of Significant 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 | 2023 | 2022 | 2021
Expected volatility | 30.3 | % | 27.3 | % | 27.6 | %
Expected dividend yield | 2.9 |  | 2.8 |  | 2.8 |
Risk-free rate | 3.9 |  | 1.4 |  | 0.2 |
Summary of 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 | 2023 | 2022 | 2021
CMS Energy, including Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 52.62 |  |  | $ | 48.69 |  |  | $ | 43.52 |
Restricted stock units granted |  | 50.32 |  |  | 56.13 |  |  | 54.11 |
Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 52.42 |  |  | $ | 48.57 |  |  | $ | 42.85 |
Restricted stock units granted |  | 50.34 |  |  | 56.07 |  |  | 53.93 |
Schedule of Amounts Related to Restricted Stock Awards and Restricted Stock Units | Presented in the following table are amounts related to restricted stock awards and restricted stock units:
In Millions
Years Ended December 31 | 2023 | 2022 | 2021
CMS Energy, including Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 20 |  |  | $ | 27 |  |  | $ | 25 |
Compensation expense recognized |  | 28 |  |  | 26 |  |  | 22 |
Income tax benefit recognized |  | 3 |  |  | — |  |  | 1 |
Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 19 |  |  | $ | 25 |  |  | $ | 24 |
Compensation expense recognized |  | 26 |  |  | 25 |  |  | 21 |
Income tax benefit recognized |  | 2 |  |  | — |  |  | 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, 2023 | 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 | 1,029,523 |  |  | $ | 60.13 |  |  | 978,146 |  |  | $ | 60.15 |
Granted |  |  |  |  |  |  |
Restricted stock | 502,039 |  |  | 52.62 |  |  | 474,917 |  |  | 52.42 |
Restricted stock units | 19,082 |  |  | 50.32 |  |  | 18,315 |  |  | 50.34 |
Vested |  |  |  |  |  |  |
Restricted stock | (313,344) |  |  | 51.54 |  |  | (302,177) |  |  | 51.48 |
Restricted stock units | (15,211) |  |  | 52.60 |  |  | (14,523) |  |  | 52.55 |
Forfeited – restricted stock | (63,987) |  |  | 53.57 |  |  | (60,312) |  |  | 53.45 |
Nonvested at end of period | 1,158,102 |  |  | $ | 59.50 |  |  | 1,094,366 |  |  | $ | 59.50 |
Year Ended December 31, 2023 | CMS Energy, including Consumers | Consumers
Granted |  |
Time-lapse awards | 115,591 |  | 108,216 |
Market-based awards | 147,453 |  | 139,255 |
Performance-based awards | 153,383 |  | 145,008 |
Restricted stock units | 15,545 |  | 14,925 |
Dividends on market-based awards | 14,825 |  | 14,038 |
Dividends on performance-based awards | 15,608 |  | 14,787 |
Dividends on restricted stock units | 3,537 |  | 3,390 |
Additional performance-based shares based on achievement of condition | 55,179 |  | 53,613 |
Total granted | 521,121 |  | 493,232 |
Schedule of Significant 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 | 2023 | 2022 | 2021
Expected volatility | 30.3 | % | 27.3 | % | 27.6 | %
Expected dividend yield | 2.9 |  | 2.8 |  | 2.8 |
Risk-free rate | 3.9 |  | 1.4 |  | 0.2 |
Summary of 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 | 2023 | 2022 | 2021
CMS Energy, including Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 52.62 |  |  | $ | 48.69 |  |  | $ | 43.52 |
Restricted stock units granted |  | 50.32 |  |  | 56.13 |  |  | 54.11 |
Consumers |  |  |  |  |  |
Weighted-average grant-date fair value per share |  |  |  |  |  |
Restricted stock granted |  | $ | 52.42 |  |  | $ | 48.57 |  |  | $ | 42.85 |
Restricted stock units granted |  | 50.34 |  |  | 56.07 |  |  | 53.93 |
Schedule of Amounts Related to Restricted Stock Awards and Restricted Stock Units | Presented in the following table are amounts related to restricted stock awards and restricted stock units:
In Millions
Years Ended December 31 | 2023 | 2022 | 2021
CMS Energy, including Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 20 |  |  | $ | 27 |  |  | $ | 25 |
Compensation expense recognized |  | 28 |  |  | 26 |  |  | 22 |
Income tax benefit recognized |  | 3 |  |  | — |  |  | 1 |
Consumers |  |  |  |  |  |
Fair value of shares that vested during the year |  | $ | 19 |  |  | $ | 25 |  |  | $ | 24 |
Compensation expense recognized |  | 26 |  |  | 25 |  |  | 21 |
Income tax benefit recognized |  | 2 |  |  | — |  |  | 1 |

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