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Notes Receivable (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2017
Schedule Of Current And Non-Current Notes Receivable |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 | December 31, 2016 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Current |  |  |  |  |  |  |
﻿EnerBank notes receivable, net of allowance for loan losses |  | $ | 163 |  | $ | 151 |
﻿EnerBank notes receivable held for sale |  |  | 18 |  |  | 39 |
﻿State of Michigan tax settlement |  |  | 30 |  |  | 29 |
﻿Non-current |  |  |  |  |  |  |
﻿EnerBank notes receivable |  |  | 1,094 |  |  | 1,088 |
﻿State of Michigan tax settlement |  |  | 20 |  |  | 19 |
﻿Total notes receivable |  | $ | 1,325 |  | $ | 1,326 |
﻿Consumers |  |  |  |  |  |  |
﻿Current |  |  |  |  |  |  |
﻿State of Michigan tax settlement |  | $ | 30 |  | $ | 29 |
﻿Non-current |  |  |  |  |  |  |
﻿State of Michigan tax settlement |  |  | 16 |  |  | 16 |
﻿Total notes receivable |  | $ | 46 |  | $ | 45 |
﻿
Consumers Energy Company [Member] |
Schedule Of Current And Non-Current Notes Receivable |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 | December 31, 2016 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Current |  |  |  |  |  |  |
﻿EnerBank notes receivable, net of allowance for loan losses |  | $ | 163 |  | $ | 151 |
﻿EnerBank notes receivable held for sale |  |  | 18 |  |  | 39 |
﻿State of Michigan tax settlement |  |  | 30 |  |  | 29 |
﻿Non-current |  |  |  |  |  |  |
﻿EnerBank notes receivable |  |  | 1,094 |  |  | 1,088 |
﻿State of Michigan tax settlement |  |  | 20 |  |  | 19 |
﻿Total notes receivable |  | $ | 1,325 |  | $ | 1,326 |
﻿Consumers |  |  |  |  |  |  |
﻿Current |  |  |  |  |  |  |
﻿State of Michigan tax settlement |  | $ | 30 |  | $ | 29 |
﻿Non-current |  |  |  |  |  |  |
﻿State of Michigan tax settlement |  |  | 16 |  |  | 16 |
﻿Total notes receivable |  | $ | 46 |  | $ | 45 |
﻿

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- Definition Tabular disclosure of current and non-current notes receivable. + References No definition available. + Details
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Namespace Prefix: | cms_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
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Data Type: | na
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Period Type: |