XML 35 R19.htm IDEA: XBRL DOCUMENT
v3.21.1

Cash And Cash Equivalents | 3 Months Ended
--- | ---
Mar. 31, 2021
Cash and Cash Equivalents [Line Items] |
Cash And Cash Equivalents | Cash and Cash Equivalents 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
| March 31, 2021 | December 31, 2020
CMS Energy, including Consumers |  |  |  |
Cash and cash equivalents |  | $ | 496 |  |  | $ | 168 |
Restricted cash and cash equivalents |  | 28 |  |  | 17 |
Cash and cash equivalents, including restricted amounts |  | $ | 524 |  |  | $ | 185 |
Consumers |  |  |  |
Cash and cash equivalents |  | $ | 9 |  |  | $ | 20 |
Restricted cash and cash equivalents |  | 25 |  |  | 15 |
Cash and cash equivalents, including restricted amounts |  | $ | 34 |  |  | $ | 35 |
Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less. Restricted Cash and Cash Equivalents: Restricted cash and cash equivalents are held primarily for the repayment of securitization bonds and funds held in escrow. Cash and cash equivalents may also be restricted to pay other contractual obligations such as leasing of coal railcars. These amounts are classified as current assets since they relate to payments that could or will occur within one year.
Consumers Energy Company |
Cash and Cash Equivalents [Line Items] |
Cash And Cash Equivalents | Cash and Cash Equivalents 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
| March 31, 2021 | December 31, 2020
CMS Energy, including Consumers |  |  |  |
Cash and cash equivalents |  | $ | 496 |  |  | $ | 168 |
Restricted cash and cash equivalents |  | 28 |  |  | 17 |
Cash and cash equivalents, including restricted amounts |  | $ | 524 |  |  | $ | 185 |
Consumers |  |  |  |
Cash and cash equivalents |  | $ | 9 |  |  | $ | 20 |
Restricted cash and cash equivalents |  | 25 |  |  | 15 |
Cash and cash equivalents, including restricted amounts |  | $ | 34 |  |  | $ | 35 |
Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less. Restricted Cash and Cash Equivalents: Restricted cash and cash equivalents are held primarily for the repayment of securitization bonds and funds held in escrow. Cash and cash equivalents may also be restricted to pay other contractual obligations such as leasing of coal railcars. These amounts are classified as current assets since they relate to payments that could or will occur within one year.

X
- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsDisclosureTextBlock
Namespace Prefix: | us-gaap_
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: |