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Cash And Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2016
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿December 31 | 2016 | 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 235 |  | $ | 266 |
﻿Restricted cash and cash equivalents |  |  | 19 |  |  | 19 |
﻿Other non-current assets |  |  | 3 |  |  | 3 |
﻿Cash and cash equivalents, including restricted amounts |  | $ | 257 |  | $ | 288 |
﻿Consumers |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 131 |  | $ | 50 |
﻿Restricted cash and cash equivalents |  |  | 19 |  |  | 19 |
﻿Other non-current assets |  |  | 2 |  |  | 2 |
﻿Cash and cash equivalents, including restricted amounts |  | $ | 152 |  | $ | 71 |
﻿
Consumers Energy Company [Member] |
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿December 31 | 2016 | 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 235 |  | $ | 266 |
﻿Restricted cash and cash equivalents |  |  | 19 |  |  | 19 |
﻿Other non-current assets |  |  | 3 |  |  | 3 |
﻿Cash and cash equivalents, including restricted amounts |  | $ | 257 |  | $ | 288 |
﻿Consumers |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 131 |  | $ | 50 |
﻿Restricted cash and cash equivalents |  |  | 19 |  |  | 19 |
﻿Other non-current assets |  |  | 2 |  |  | 2 |
﻿Cash and cash equivalents, including restricted amounts |  | $ | 152 |  | $ | 71 |
﻿

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- Definition Tabular disclosure of the components of cash and cash equivalents, including restricted amounts. + References No definition available. + Details
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- Details
Name: | dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
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Data Type: | na
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