Form 8-K
8-K — CMS ENERGY CORP
Accession: 0001104659-26-070037
Filed: 2026-06-03
Period: 2026-06-01
CIK: 0000811156
SIC: 4931 (ELECTRIC & OTHER SERVICES COMBINED)
Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item: Regulation FD Disclosure
Item: Financial Statements and Exhibits
Documents
8-K — tm2616692d1_8k.htm (Primary)
EX-99.1 — EXHIBIT 99.1 (tm2616692d1_ex99-1.htm)
GRAPHIC (tm2616692d1_ex99-1img001.jpg)
XML — IDEA: XBRL DOCUMENT (R1.htm)
8-K — FORM 8-K
8-K (Primary)
Filename: tm2616692d1_8k.htm · Sequence: 1
false
0000811156
0000201533
false
8-K
2026-06-1
false
false
false
false
0000811156
2026-06-01
2026-06-01
0000811156
cms:ConsumersEnergyCompanyMember
2026-06-01
2026-06-01
0000811156
us-gaap:CommonStockMember
2026-06-01
2026-06-01
0000811156
cms:A5.625JuniorSubordinatedNotesDue2078Member
2026-06-01
2026-06-01
0000811156
cms:A5.875JuniorSubordinatedNotesDue2078Member
2026-06-01
2026-06-01
0000811156
cms:A5.875JuniorSubordinatedNotesDue2079Member
2026-06-01
2026-06-01
0000811156
cms:CMSEnergyCorporationDepositaryShareseachrepresentinga11000thinterestinashareof4200percentCumulativeRedeemablePerpetualPreferredStockSeriesCMember
2026-06-01
2026-06-01
iso4217:USD
xbrli:shares
iso4217:USD
xbrli:shares
UNITED STATES
SECURITIES AND
EXCHANGE COMMISSION
Washington, D.C.
20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13
OR 15(d) OF
THE SECURITIES
EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported)
June 1, 2026
Commission
Registrant; State of Incorporation;
IRS Employer
File Number
Address; and Telephone Number
Identification No.
1-9513
CMS ENERGY CORPORATION
(A Michigan Corporation)
One Energy Plaza
Jackson, Michigan 49201
(517) 788-0550
38-2726431
1-5611
CONSUMERS ENERGY COMPANY
(A
Michigan Corporation)
One Energy Plaza
Jackson, Michigan 49201
(517) 788-0550
38-0442310
Check the appropriate box below if the Form 8-K filing
is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
¨ Written communications pursuant
to Rule 425 under the Securities Act (17 CFR 230.425)
¨ Soliciting material pursuant
to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨ Pre-commencement communications
pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading Symbol(s)
Name of each exchange
on which registered
CMS Energy Corporation Common Stock, $0.01 par value
CMS
New York Stock Exchange
CMS Energy Corporation 5.625% Junior Subordinated Notes due 2078
CMSA
New York Stock Exchange
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2078
CMSC
New York Stock Exchange
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2079
CMSD
New York Stock Exchange
CMS Energy Corporation, Depositary Shares,
each representing a 1/1,000th interest in a share of 4.200% Cumulative Redeemable Perpetual Preferred Stock, Series C
CMS PRC
New York Stock Exchange
Consumers
Energy Company Cumulative Preferred Stock, $100 par value: $4.50 Series
CMS-PB
New York Stock Exchange
Indicate
by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405
of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth
company: CMS Energy Corporation ¨ Consumers
Energy Company ¨
If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying
with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. CMS
Energy Corporation ¨ Consumers
Energy Company ¨
Co-Registrant CIK
0000201533
Co-Registrant Amendment Flag
false
Co-Registrant Form Type
8-K
Co-Registrant DocumentPeriodEndDate
2026-06-1
Co-Registrant Written Communications
false
Co-Registrant Solicitating Materials
false
Co-Registrant PreCommencement Tender Offer
false
Co-Registrant PreCommencement Issuer Tender Offer
false
Item 5.02 Departure of Directors or Certain Officers; Election of
Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On June 3, 2026, CMS Energy Corporation (“CMS Energy”)
announced that Rejji P. Hayes has retired from his positions as CMS Energy and Consumers Energy Company (“Consumers Energy”)
executive vice president and chief financial officer, effective June 3, 2026.
Srikanth (Sri) Maddipati, 43, has been appointed to succeed Hayes as
CMS Energy and Consumers Energy executive vice president and chief financial officer, effective June 3, 2026. Maddipati has been
with CMS Energy for 12 years, joining in 2014 as assistant treasurer. In 2016, Maddipati was elected vice president and treasurer
where he was responsible for budget and planning, corporate liquidity, financing and maintaining relationships with investors, banks and
rating agencies, a position he held until he moved to the role of Consumers Energy vice president electric supply in 2023. In that role,
Maddipati was responsible for Consumers Energy’s electric supply business unit, which includes electric supply planning and
strategy, market operations, generating plant operations and engineering, and generation development and procurement. He also led the
company’s enterprise project management and real estate functions. Maddipati was appointed Consumers Energy senior vice president
and president of the electric supply business unit in 2025. Prior to joining CMS Energy, Maddipati was vice president in the financial
institutions group at Goldman Sachs.
The Compensation Committee of the Board has approved (i) a base
salary for Maddipati of $775,000 annually and (ii) an increase in his standard award percentage under the CMS Energy Incentive Compensation
Plan to 80% of his base salary. These changes will be effective June 3, 2026. In addition, Maddipati will receive $750,000 in tenure-based
restricted stock which cliff vests on his third-year service anniversary.
There are no arrangements or understandings between Maddipati and CMS
Energy or Consumers Energy pursuant to which Maddipati was elected as executive vice president and chief financial officer.
Additional leadership roles are described in the CMS Energy News Release
which is filed as Exhibit 99.1 to this report and incorporated by reference.
Item 7.01. Regulation FD Disclosure.
The information set forth under Item 5.02 of this Current
Report on Form 8-K is hereby incorporated in Item 7.01 by reference. Additionally, CMS Energy reaffirms, as of June 3,
2026, its guidance as provided on April 28, 2026.
In accordance with General Instruction B.2 of Form 8-K, the information
in this Item 7.01 of this Current Report on Form 8-K, shall not be deemed “filed” for the purposes of Section 18
of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by
reference in any filing under the Securities Act of 1933.
Investors and others should note that CMS Energy routinely posts important
information on its website and considers the Investor Relations section, www.cmsenergy.com/investor-relations, a channel of distribution.
This 8-K contains “forward-looking statements.” The forward-looking statements are subject to risks and uncertainties that could cause
CMS Energy’s and Consumers Energy’s results to differ materially. All forward-looking statements should be considered in the
context of the risk and other factors detailed from time to time in CMS Energy’s and Consumers Energy’s Securities and Exchange Commission
filings.
Item 9.01. Financial Statements and Exhibits.
(d) Exhibits.
Exhibit Index
99.1
CMS Energy News Release dated June 3, 2026
104
Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document).
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.
CMS ENERGY CORPORATION
Dated: June 3, 2026
By:
/s/ Shaun M. Johnson
Shaun M. Johnson
Executive Vice President and
Chief Legal and
Administrative Officer
CONSUMERS ENERGY COMPANY
Dated: June 3, 2026
By:
/s/ Shaun M. Johnson
Shaun M. Johnson
Executive Vice President and
Chief Legal and
Administrative Officer
EX-99.1 — EXHIBIT 99.1
EX-99.1
Filename: tm2616692d1_ex99-1.htm · Sequence: 2
Exhibit 99.1
CMS
Energy Announces Sri Maddipati as Chief Financial Officer, Chris Fultz as President of Electric Supply
JACKSON, Mich.,
June 3, 2026 – CMS Energy announced today, Sri Maddipati, currently Consumers Energy’s senior vice president and president
of electric supply, will be named CMS Energy and Consumers Energy Executive Vice President and Chief Financial Officer, effective on
June 3. Sri will oversee Investor Relations, Treasury, Tax, Accounting, and Financial Planning. Chris Fultz, vice president of low
voltage distribution at Consumers Energy, will become the new senior vice president and president of electric supply, also effective
on June 3. Chris will manage the company’s electric supply business unit, which includes electric supply planning and strategy,
market operations, generating plant operations and engineering, generation development and procurement.
“Sri has nearly
20 years of experience across finance, treasury, banking, capital markets, and investor relations which allows for a seamless transition
of leadership,” said Garrick Rochow, President and CEO of CMS Energy and Consumers Energy. “Sri has held several senior leadership
positions across our company and brings a combination of financial, operational, strategic and regulatory skills which reflects the company’s
thoughtful approach to development and succession and makes him exceptionally well-suited to serve as our next CFO and help lead the
company forward.”
Sri joined CMS Energy
in 2014 and was elected as vice president and treasurer in 2016 where he was responsible for budget and planning, corporate liquidity,
financing and maintaining relationships with investors, banks and rating agencies, a position he held until he moved to the role of Consumers
Energy vice president electric supply in 2023. In that role, Sri was responsible for Consumers Energy’s electric supply business
unit, which includes electric supply planning and strategy, market operations, generating plant operations and engineering, and generation
development and procurement. Sri was appointed Consumers Energy senior vice president and president of the electric supply business unit
in 2025. Prior to joining CMS Energy, Sri was a vice president in the financial institutions group at Goldman Sachs. Sri holds bachelor’s
and master’s degrees in engineering and a Master in Business Administration, all from the University of Michigan.
“Chris brings
a clear commitment to safety, reliability, and affordability, along with the ability to lead large-scale operations and teams
to the electric supply organization,” said Garrick Rochow, President and CEO of CMS Energy and Consumers Energy. “His broad
expertise and leadership within operations, engineering, and project management will be an asset as we plan and execute our long-term
energy supply blueprint.”
Chris previously
served as vice president of low voltage distribution in our electric business and vice president of natural gas operations. Since joining
the company in 2014, Chris held increasingly responsible roles within project management, natural gas operations, transmission, storage
and compression. Prior to Consumers Energy, Fultz worked for Black & Veatch, and he holds bachelor’s and master’s
degrees in electrical engineering from Michigan Technological University, and a master’s degree in business administration from
Oakland University.
Rejji Hayes will
retire as Executive Vice President and Chief Financial Officer, effective June 3.
“I want to
thank Rejji Hayes for his leadership and many contributions to the company. His impact to our co-workers, communities, customers, and
investors has been meaningful, and we are grateful for his service. I wish Rejji the very best in the future.”
CMS Energy (NYSE:
CMS) is a Michigan-based energy provider featuring Consumers Energy as its primary business. It also owns and operates independent power
generation businesses.
Investors and others
should note that CMS Energy routinely posts important information on its website and considers the Investor Relations section, www.cmsenergy.com/investor-relations,
a channel of distribution.
# # #
Media Contacts: Katie Carey, 517/740-1739
Investment Analyst Contact: Travis
Uphaus, 517/817-9241
2
GRAPHIC
GRAPHIC
Filename: tm2616692d1_ex99-1img001.jpg · Sequence: 7
Binary file (67991 bytes)
Download tm2616692d1_ex99-1img001.jpg
XML — IDEA: XBRL DOCUMENT
XML
Filename: R1.htm · Sequence: 9
v3.26.1
Cover
Jun. 01, 2026
Entity Information [Line Items]
Document Type
8-K
Amendment Flag
false
Document Period End Date
Jun. 01, 2026
Entity File Number
1-9513
Entity Registrant Name
CMS ENERGY CORPORATION
Entity Central Index Key
0000811156
Entity Tax Identification Number
38-2726431
Entity Incorporation, State or Country Code
MI
Entity Address, Address Line One
One Energy Plaza
Entity Address, City or Town
Jackson
Entity Address, State or Province
MI
Entity Address, Postal Zip Code
49201
City Area Code
517
Local Phone Number
788-0550
Written Communications
false
Soliciting Material
false
Pre-commencement Tender Offer
false
Pre-commencement Issuer Tender Offer
false
Entity Emerging Growth Company
false
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security
CMS Energy Corporation Common Stock, $0.01 par value
Trading Symbol
CMS
Security Exchange Name
NYSE
A 5. 625 Junior Subordinated Notes Due 2078 [Member]
Entity Information [Line Items]
Title of 12(b) Security
CMS Energy Corporation 5.625% Junior Subordinated Notes due 2078
Trading Symbol
CMSA
Security Exchange Name
NYSE
A 5. 875 Junior Subordinated Notes Due 2078 [Member]
Entity Information [Line Items]
Title of 12(b) Security
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2078
Trading Symbol
CMSC
Security Exchange Name
NYSE
A 5. 875 Junior Subordinated Notes Due 2079 [Member]
Entity Information [Line Items]
Title of 12(b) Security
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2079
Trading Symbol
CMSD
Security Exchange Name
NYSE
C M S Energy Corporation Depositary Shareseachrepresentinga 11000thinterestinashareof 4200percent Cumulative Redeemable Perpetual Preferred Stock Series C [Member]
Entity Information [Line Items]
Title of 12(b) Security
CMS Energy Corporation, Depositary Shares
Trading Symbol
CMS PRC
Security Exchange Name
NYSE
Consumers Energy Company [Member]
Entity Information [Line Items]
Document Type
8-K
Amendment Flag
false
Document Period End Date
Jun. 01, 2026
Entity File Number
1-5611
Entity Registrant Name
CONSUMERS ENERGY COMPANY
Entity Central Index Key
0000201533
Entity Tax Identification Number
38-0442310
Entity Incorporation, State or Country Code
MI
Entity Address, Address Line One
One Energy Plaza
Entity Address, City or Town
Jackson
Entity Address, State or Province
MI
Entity Address, Postal Zip Code
49201
City Area Code
517
Local Phone Number
788-0550
Written Communications
false
Soliciting Material
false
Pre-commencement Tender Offer
false
Pre-commencement Issuer Tender Offer
false
Title of 12(b) Security
Consumers
Energy Company Cumulative Preferred Stock, $100 par value: $4.50 Series
Trading Symbol
CMS-PB
Security Exchange Name
NYSE
Entity Emerging Growth Company
false
X
- Definition
Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.
+ References
No definition available.
+ Details
Name:
dei_AmendmentFlag
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Area code of city
+ References
No definition available.
+ Details
Name:
dei_CityAreaCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.
+ References
No definition available.
+ Details
Name:
dei_DocumentPeriodEndDate
Namespace Prefix:
dei_
Data Type:
xbrli:dateItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.
+ References
No definition available.
+ Details
Name:
dei_DocumentType
Namespace Prefix:
dei_
Data Type:
dei:submissionTypeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 1 such as Attn, Building Name, Street Name
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine1
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the City or Town
+ References
No definition available.
+ Details
Name:
dei_EntityAddressCityOrTown
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Code for the postal or zip code
+ References
No definition available.
+ Details
Name:
dei_EntityAddressPostalZipCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the state or province.
+ References
No definition available.
+ Details
Name:
dei_EntityAddressStateOrProvince
Namespace Prefix:
dei_
Data Type:
dei:stateOrProvinceItemType
Balance Type:
na
Period Type:
duration
X
- Definition
A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityCentralIndexKey
Namespace Prefix:
dei_
Data Type:
dei:centralIndexKeyItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Indicate if registrant meets the emerging growth company criteria.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityEmergingGrowthCompany
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.
+ References
No definition available.
+ Details
Name:
dei_EntityFileNumber
Namespace Prefix:
dei_
Data Type:
dei:fileNumberItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Two-character EDGAR code representing the state or country of incorporation.
+ References
No definition available.
+ Details
Name:
dei_EntityIncorporationStateCountryCode
Namespace Prefix:
dei_
Data Type:
dei:edgarStateCountryItemType
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:
dei_EntityInformationLineItems
Namespace Prefix:
dei_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityRegistrantName
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityTaxIdentificationNumber
Namespace Prefix:
dei_
Data Type:
dei:employerIdItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Local phone number for entity.
+ References
No definition available.
+ Details
Name:
dei_LocalPhoneNumber
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 13e
-Subsection 4c
+ Details
Name:
dei_PreCommencementIssuerTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14d
-Subsection 2b
+ Details
Name:
dei_PreCommencementTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Title of a 12(b) registered security.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b
+ Details
Name:
dei_Security12bTitle
Namespace Prefix:
dei_
Data Type:
dei:securityTitleItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the Exchange on which a security is registered.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1
+ Details
Name:
dei_SecurityExchangeName
Namespace Prefix:
dei_
Data Type:
dei:edgarExchangeCodeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14a
-Subsection 12
+ Details
Name:
dei_SolicitingMaterial
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Trading symbol of an instrument as listed on an exchange.
+ References
No definition available.
+ Details
Name:
dei_TradingSymbol
Namespace Prefix:
dei_
Data Type:
dei:tradingSymbolItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 230
-Section 425
+ Details
Name:
dei_WrittenCommunications
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Details
Name:
us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
us-gaap_StatementClassOfStockAxis=cms_A5.625JuniorSubordinatedNotesDue2078Member
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
us-gaap_StatementClassOfStockAxis=cms_A5.875JuniorSubordinatedNotesDue2078Member
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
us-gaap_StatementClassOfStockAxis=cms_A5.875JuniorSubordinatedNotesDue2079Member
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
us-gaap_StatementClassOfStockAxis=cms_CMSEnergyCorporationDepositaryShareseachrepresentinga11000thinterestinashareof4200percentCumulativeRedeemablePerpetualPreferredStockSeriesCMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: