XML 51 R35.htm IDEA: XBRL DOCUMENT
v3.19.2

Cash And Cash Equivalents (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Cash and Cash Equivalents [Line Items] |
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts | Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:
In Millions |
| June 30, 2019 |  | December 31, 2018 |
CMS Energy, including Consumers |  |  |  |
Cash and cash equivalents |  | $ | 312 |  |  | $ | 153 |
Restricted cash and cash equivalents |  | 22 |  |  | 21 |
Other non-current assets |  | — |  |  | 1 |
Cash and cash equivalents, including restricted amounts |  | $ | 334 |  |  | $ | 175 |
Consumers |  |  |  |
Cash and cash equivalents |  | $ | 196 |  |  | $ | 39 |
Restricted cash and cash equivalents |  | 16 |  |  | 17 |
Cash and cash equivalents, including restricted amounts |  | $ | 212 |  |  | $ | 56 |
Consumers Energy Company |
Cash and Cash Equivalents [Line Items] |
Schedule Of Cash And Cash Equivalents, Including Restricted Amounts | Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:
In Millions |
| June 30, 2019 |  | December 31, 2018 |
CMS Energy, including Consumers |  |  |  |
Cash and cash equivalents |  | $ | 312 |  |  | $ | 153 |
Restricted cash and cash equivalents |  | 22 |  |  | 21 |
Other non-current assets |  | — |  |  | 1 |
Cash and cash equivalents, including restricted amounts |  | $ | 334 |  |  | $ | 175 |
Consumers |  |  |  |
Cash and cash equivalents |  | $ | 196 |  |  | $ | 39 |
Restricted cash and cash equivalents |  | 16 |  |  | 17 |
Cash and cash equivalents, including restricted amounts |  | $ | 212 |  |  | $ | 56 |

X
- Definition Tabular disclosure of the components of cash and cash equivalents, including restricted amounts. + References No definition available. + Details
Name: | cms_ScheduleOfCashAndCashEquivalentsIncludingRestrictedTableTextBlock
Namespace Prefix: | cms_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |