XML 160 R38.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Financings And Capitalization (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Summary Of Long-Term Debt Outstanding |
In Millions
| Interest Rate (%) |  | Maturity | 2014 | 2013 |
CMS Energy parent |  |  |  |  |  |  |  |  |  |
Senior notes | 6.875 | 1 | 2015 |  | $ | - |  | $ | 125 |
| 4.250 | 2 | 2015 |  |  | - |  |  | 250 |
| 6.550 |  | 2017 |  |  | 250 |  |  | 250 |
| 5.050 |  | 2018 |  |  | 250 |  |  | 250 |
| 8.750 |  | 2019 |  |  | 300 |  |  | 300 |
| 6.250 |  | 2020 |  |  | 300 |  |  | 300 |
| 5.050 |  | 2022 |  |  | 300 |  |  | 300 |
| 3.875 |  | 2024 |  |  | 250 |  |  | - |
| 5.500 | 3 | 2029 |  |  | - |  |  | 172 |
| 4.700 |  | 2043 |  |  | 250 |  |  | 250 |
| 4.875 |  | 2044 |  |  | 300 |  |  | - |
Total CMS Energy senior notes |  |  |  |  | $ | 2,200 |  | $ | 2,197 |
Term loan facility | variable | 4 | 2017 |  |  | 180 |  |  | 180 |
Total CMS Energy parent |  |  |  |  | $ | 2,380 |  | $ | 2,377 |
Consumers |  |  |  |  | $ | 5,283 |  | $ | 4,625 |
Other CMS Energy subsidiaries |  |  |  |  |  |  |  |  |  |
EnerBank certificates of deposits | 1.218 | 5 | 2015-2024 |  | $ | 884 |  | $ | 652 |
Total other CMS Energy subsidiaries |  |  |  |  | $ | 884 |  | $ | 652 |
Total CMS Energy principal amount outstanding |  |  |  |  | $ | 8,547 |  | $ | 7,654 |
Current amounts |  |  |  |  |  | (519) |  |  | (541) |
Net unamortized discounts |  |  |  |  |  | (12) |  |  | (12) |
Total CMS Energy long-term debt |  |  |  |  | $ | 8,016 |  | $ | 7,101 |
| 1 |  | In April 2014, CMS Energy retired its 6.875 percent senior notes.
| 2 |  | In December 2014, CMS Energy retired its 4.25 percent senior notes.
| 3 |  | In June 2014, CMS Energy retired its remaining 5.50 percent contingently convertible notes. See the “Contingently Convertible Securities” section in this Note for further discussion of the conversions.
| 4 |  | Outstanding borrowings bear interest at an annual interest rate of LIBOR plus 1.25 percent (1.42 percent at December 31, 2014).
| 5 |  | The weighted-average interest rate for EnerBank’s certificates of deposit was 1.22 percent at December 31, 2014 and 1.09 percent at December 31, 2013. EnerBank’s primary deposit product consists of brokered certificates of deposit with varying maturities and having a face value of $1,000.
Summary Of Major Long-Term Debt Transactions |
| Principal |  | Issue/Retirement |  |
| (In Millions) | Interest Rate |  | Date | Maturity Date |
Debt issuances |  |  |  |  |  |  |  |
CMS Energy parent |  |  |  |  |  |  |  |
Senior notes |  | $ | 250 | 3.875 | % | February 2014 | March 2024 |
Senior notes |  |  | 300 | 4.875 |  | February 2014 | March 2044 |
Total CMS Energy parent |  | $ | 550 |  |  |  |  |
Consumers |  |  |  |  |  |  |  |
Securitization bonds 1 |  | $ | 124 | 1.334 | % | July 2014 | November 2020 |
Securitization bonds 1 |  |  | 139 | 2.962 |  | July 2014 | November 2025 |
Securitization bonds 1 |  |  | 115 | 3.528 |  | July 2014 | May 2029 |
FMBs |  |  | 250 | 3.125 |  | August 2014 | August 2024 |
FMBs |  |  | 250 | 4.350 |  | August 2014 | August 2064 |
Total Consumers |  | $ | 878 |  |  |  |  |
Total CMS Energy |  | $ | 1,428 |  |  |  |  |
Debt retirements |  |  |  |  |  |  |  |
CMS Energy parent |  |  |  |  |  |  |  |
Senior notes 2 |  | $ | 125 | 6.875 | % | April 2014 | December 2015 |
Senior notes |  |  | 155 | 5.500 |  | June 2014 | June 2029 |
Senior notes 3 |  |  | 250 | 4.250 |  | December 2014 | September 2015 |
Total CMS Energy parent |  | $ | 530 |  |  |  |  |
Consumers |  |  |  |  |  |  |  |
FMBs |  | $ | 177 | 5.500 | % | August 2014 | August 2016 |
Total Consumers |  | $ | 177 |  |  |  |  |
Total CMS Energy |  | $ | 707 |  |  |  |  |
| 1 |  | For additional details regarding the Securitization, see Note 3, Regulatory Matters and the “Securitization Bonds” section in this Note.
| 2 |  | CMS Energy retired this debt at a premium and recorded a loss on extinguishment of $13 million in other expense on its consolidated statements of income.
| 3 |  | CMS Energy retired this debt at a premium and recorded a loss on extinguishment of $7 million in other expense on its consolidated statements of income.
Debt Maturities |
In Millions
| 2015 | 2016 | 2017 | 2018 | 2019 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ | 519 |  | $ | 542 |  | $ | 734 |  | $ | 866 |  | $ | 1,234 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ | 124 |  | $ | 198 |  | $ | 375 |  | $ | 523 |  | $ | 876 |
Revolving Credit Facilities |
In Millions
| Amount of | Amount | Letters of Credit | Amount |
Expiration Date | Facility | Borrowed | Outstanding | Available |
CMS Energy parent |  |  |  |  |  |  |  |  |  |  |  |  |
December 20, 2018 1 |  | $ | 550 |  | $ | - |  | $ | 3 |  | $ | 547 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
December 20, 2018 2 |  | $ | 650 |  | $ | - |  | $ | 35 |  | $ | 615 |
May 9, 2018 2 |  |  | 30 |  |  | - |  |  | 30 |  |  | - |
| 1 |  | Obligations under this facility are secured by Consumers common stock.
| 2 |  | Obligations under this facility are secured by FMBs of Consumers.
Conversions Of Contingently Convertible Securities |
|  |  | Conversion | Shares |
|  | Principal | Value per | of Common | Cash Paid on |
| Conversion | Converted | $1,000 of | Stock Issued | Settlement |
| Date | (In Millions) | Principal | on Settlement | (In Millions) |
5.50% senior notes due 2029 | February 2014 |  | $ | 17 |  | $ | 1,968 | 605,531 |  | $ | 17 |
5.50% senior notes due 2029 | June 2014 |  |  | 155 |  |  | 2,215 | 6,372,578 |  |  | 155 |
Issuance Of Stock |
| Number of | Average | Proceeds |
| Shares Issued | Price per Share | (In Millions) |
March 2014 | 1,070,080 |  | $ | 28.04 |  | $ | 30 |
Consumers Energy Company [Member] |
Summary Of Long-Term Debt Outstanding |
In Millions
| Interest Rate (%) |  | Maturity | 2014 | 2013 |
Consumers |  |  |  |  |  |  |  |  |  |
FMBs 1 | 2.600 |  | 2015 |  | $ | 50 |  | $ | 50 |
| 5.500 | 2 | 2016 |  |  | 173 |  |  | 350 |
| 5.150 |  | 2017 |  |  | 250 |  |  | 250 |
| 3.210 |  | 2017 |  |  | 100 |  |  | 100 |
| 5.650 |  | 2018 |  |  | 250 |  |  | 250 |
| 6.125 |  | 2019 |  |  | 350 |  |  | 350 |
| 6.700 |  | 2019 |  |  | 500 |  |  | 500 |
| 5.650 |  | 2020 |  |  | 300 |  |  | 300 |
| 3.770 |  | 2020 |  |  | 100 |  |  | 100 |
| 5.300 |  | 2022 |  |  | 250 |  |  | 250 |
| 2.850 |  | 2022 |  |  | 375 |  |  | 375 |
| 3.375 |  | 2023 |  |  | 325 |  |  | 325 |
| 3.190 |  | 2024 |  |  | 52 |  |  | 52 |
| 3.125 |  | 2024 |  |  | 250 |  |  | - |
| 3.390 |  | 2027 |  |  | 35 |  |  | 35 |
| 5.800 |  | 2035 |  |  | 175 |  |  | 175 |
| 6.170 |  | 2040 |  |  | 50 |  |  | 50 |
| 4.970 |  | 2040 |  |  | 50 |  |  | 50 |
| 4.310 |  | 2042 |  |  | 263 |  |  | 263 |
| 3.950 |  | 2043 |  |  | 425 |  |  | 425 |
| 4.350 |  | 2064 |  |  | 250 |  |  | - |
|  |  |  |  | $ | 4,573 |  | $ | 4,250 |
Securitization bonds | 5.760 | 3 | 2015 |  |  | 49 |  |  | 92 |
| 2.597 | 4 | 2020-2029 | 5 |  | 378 |  |  | - |
|  |  |  |  | $ | 427 |  | $ | 92 |
Senior notes | 6.875 |  | 2018 |  |  | 180 |  |  | 180 |
Tax-exempt pollution control revenue bonds | various |  | 2018-2035 |  |  | 103 |  |  | 103 |
Total Consumers principal amount outstanding |  |  |  |  | $ | 5,283 |  | $ | 4,625 |
Current amounts |  |  |  |  |  | (124) |  |  | (43) |
Net unamortized discounts |  |  |  |  |  | (5) |  |  | (3) |
Total Consumers long-term debt |  |  |  |  | $ | 5,154 |  | $ | 4,579 |
| 1 |  | The weighted-average interest rate for Consumers’ FMBs was 4.75 percent at December 31, 2014 and 4.90 percent at December 31, 2013.
| 2 |  | In August 2014, Consumers retired $177 million of its 5.50 percent FMBs.
| 3 |  | The interest rate for Consumers’ Securitization bonds issued through its subsidiary Consumers Funding was 5.76 percent at December 31, 2014 and 2013.
| 4 |  | The weighted-average interest rate for Consumers’ Securitization bonds issued through its subsidiary Consumers 2014 Securitization Funding was 2.60 percent at December 31, 2014.
| 5 |  | Principal and interest payments are made semiannually beginning in 2015.
Summary Of Major Long-Term Debt Transactions |
| Principal |  | Issue/Retirement |  |
| (In Millions) | Interest Rate |  | Date | Maturity Date |
Debt issuances |  |  |  |  |  |  |  |
CMS Energy parent |  |  |  |  |  |  |  |
Senior notes |  | $ | 250 | 3.875 | % | February 2014 | March 2024 |
Senior notes |  |  | 300 | 4.875 |  | February 2014 | March 2044 |
Total CMS Energy parent |  | $ | 550 |  |  |  |  |
Consumers |  |  |  |  |  |  |  |
Securitization bonds 1 |  | $ | 124 | 1.334 | % | July 2014 | November 2020 |
Securitization bonds 1 |  |  | 139 | 2.962 |  | July 2014 | November 2025 |
Securitization bonds 1 |  |  | 115 | 3.528 |  | July 2014 | May 2029 |
FMBs |  |  | 250 | 3.125 |  | August 2014 | August 2024 |
FMBs |  |  | 250 | 4.350 |  | August 2014 | August 2064 |
Total Consumers |  | $ | 878 |  |  |  |  |
Total CMS Energy |  | $ | 1,428 |  |  |  |  |
Debt retirements |  |  |  |  |  |  |  |
CMS Energy parent |  |  |  |  |  |  |  |
Senior notes 2 |  | $ | 125 | 6.875 | % | April 2014 | December 2015 |
Senior notes |  |  | 155 | 5.500 |  | June 2014 | June 2029 |
Senior notes 3 |  |  | 250 | 4.250 |  | December 2014 | September 2015 |
Total CMS Energy parent |  | $ | 530 |  |  |  |  |
Consumers |  |  |  |  |  |  |  |
FMBs |  | $ | 177 | 5.500 | % | August 2014 | August 2016 |
Total Consumers |  | $ | 177 |  |  |  |  |
Total CMS Energy |  | $ | 707 |  |  |  |  |
| 1 |  | For additional details regarding the Securitization, see Note 3, Regulatory Matters and the “Securitization Bonds” section in this Note.
| 2 |  | CMS Energy retired this debt at a premium and recorded a loss on extinguishment of $13 million in other expense on its consolidated statements of income.
| 3 |  | CMS Energy retired this debt at a premium and recorded a loss on extinguishment of $7 million in other expense on its consolidated statements of income.
Debt Maturities |
In Millions
| 2015 | 2016 | 2017 | 2018 | 2019 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ | 519 |  | $ | 542 |  | $ | 734 |  | $ | 866 |  | $ | 1,234 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ | 124 |  | $ | 198 |  | $ | 375 |  | $ | 523 |  | $ | 876 |
Revolving Credit Facilities |
In Millions
| Amount of | Amount | Letters of Credit | Amount |
Expiration Date | Facility | Borrowed | Outstanding | Available |
CMS Energy parent |  |  |  |  |  |  |  |  |  |  |  |  |
December 20, 2018 1 |  | $ | 550 |  | $ | - |  | $ | 3 |  | $ | 547 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
December 20, 2018 2 |  | $ | 650 |  | $ | - |  | $ | 35 |  | $ | 615 |
May 9, 2018 2 |  |  | 30 |  |  | - |  |  | 30 |  |  | - |
| 1 |  | Obligations under this facility are secured by Consumers common stock.
| 2 |  | Obligations under this facility are secured by FMBs of Consumers.
Issuance Of Stock |
|  |  |  | Optional | Number of | Balance |
|  |  |  | Redemption | Shares | Outstanding |
| Series | Price | Outstanding | (In Millions) |
December 31 |  |  |  |  |  |  |  | 2014 | 2013 |
Cumulative, $100 par value, authorized 7,500,000 shares, with no mandatory redemption |  | $ | 4.50 |  | $ | 110.00 | 373,148 |  | $ | 37 |  | $ | 37 |

X
- Definition Tabular disclosure of major long-term debt transactions. + References No definition available. + Details
Name: | cms_SummaryOfMajorDebtTransactionsTableTextBlock
Namespace Prefix: | cms_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information on an original debt issue that has been converted in a noncash (or part noncash) transaction during the accounting period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. The information may be presented entirely or partially in this block of text or in the associated elements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_ScheduleOfDebtConversionsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
Name: | us-gaap_ScheduleOfDebtInstrumentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27011957&loc=d3e177068-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21553-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d),(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6403732&loc=d3e21300-112643 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 + Details
Name: | us-gaap_ScheduleOfStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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