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Financings And Capitalization (Tables) | 9 Months Ended
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Sep. 30, 2018
Debt Instrument [Line Items] |
Major Long-Term Debt Transactions | Financings: Presented in the following table is a summary of major long-term debt transactions during the nine months ended September 30, 2018.
| Principal (In Millions) |  | Interest Rate |  | Issue/Retirement Date | Maturity Date
Debt issuances |  |  |  |  |
CMS Energy, parent only |  |  |  |  |
Junior subordinated notes 1 |  | $ | 200 |  | 5.625 | % | March 2018 | March 2078
Junior subordinated notes 1 |  | 250 |  | 5.875 | % | September 2018 | October 2078
Total CMS Energy, parent only |  | $ | 450 |  |  |  |
Consumers |  |  |  |  |
First mortgage bonds |  | $ | 550 |  | 4.05 | % | May 2018 | May 2048
Total Consumers |  | $ | 550 |  |  |  |
Total CMS Energy |  | $ | 1,000 |  |  |  |
Debt retirements |  |  |  |  |
CMS Energy, parent only |  |  |  |  |
Term loan facility |  | $ | 180 |  | variable |  | March 2018 | December 2018
Senior notes 2 |  | 100 |  | 8.75 | % | June 2018 | June 2019
Term loan facility |  | 45 |  | variable |  | August 2018 | December 2018
Total CMS Energy, parent only |  | $ | 325 |  |  |  |
Consumers |  |  |  |  |
Tax-exempt pollution control revenue bonds |  | $ | 68 |  | various |  | April 2018 | April 2018
First mortgage bonds |  | 250 |  | 5.65 | % | May 2018 | September 2018
Total Consumers |  | $ | 318 |  |  |  |
Total CMS Energy |  | $ | 643 |  |  |  |
1 | These unsecured obligations rank subordinate and junior in right of payment to all of CMS Energy’s existing and future senior indebtedness.
2 | CMS Energy retired these senior notes at a premium and recorded a loss on extinguishment of $5 million in other expense on its consolidated statements of income.
Revolving Credit Facilities | Revolving Credit Facilities: The following revolving credit facilities with banks were available at September 30, 2018:
In Millions |
Expiration Date | Amount of Facility |  | Amount Borrowed |  | Letters of Credit Outstanding |  | Amount Available |
CMS Energy, parent only |  |  |  |  |  |  |  |
June 5, 2023 1 |  | $ | 550 |  |  | $ | — |  |  | $ | 9 |  |  | $ | 541 |
Consumers |  |  |  |  |  |  |  |
June 5, 2023 2,3 |  | $ | 850 |  |  | $ | — |  |  | $ | 7 |  |  | $ | 843 |
November 23, 2019 3 |  | 250 |  |  | — |  |  | 25 |  |  | 225 |
September 9, 2019 3 |  | 30 |  |  | — |  |  | 30 |  |  | — |
1 | In June 2018, CMS Energy amended this revolving credit facility, eliminating the security provided by Consumers common stock, and extending the expiration date to June 2023.
2 | In June 2018, Consumers amended this revolving credit facility by increasing its borrowing capacity to $850 million and extending the expiration date to June 2023.
3 | Obligations under this facility are secured by first mortgage bonds of Consumers.
Issuance of Common Stock | Presented in the following table are the transactions that CMS Energy entered into under the program:
|  | Number of Shares Issued |  | Average Price Per Share |  | Net Proceeds (In Millions) |
May 2018 |  | 638,898 |  | $ | 45.83 |  | $ | 29 |
June 2017 |  | 1,494,371 |  | 47.31 |  | 70 |
Consumers Energy Company |
Debt Instrument [Line Items] |
Major Long-Term Debt Transactions | Financings: Presented in the following table is a summary of major long-term debt transactions during the nine months ended September 30, 2018.
| Principal (In Millions) |  | Interest Rate |  | Issue/Retirement Date | Maturity Date
Debt issuances |  |  |  |  |
CMS Energy, parent only |  |  |  |  |
Junior subordinated notes 1 |  | $ | 200 |  | 5.625 | % | March 2018 | March 2078
Junior subordinated notes 1 |  | 250 |  | 5.875 | % | September 2018 | October 2078
Total CMS Energy, parent only |  | $ | 450 |  |  |  |
Consumers |  |  |  |  |
First mortgage bonds |  | $ | 550 |  | 4.05 | % | May 2018 | May 2048
Total Consumers |  | $ | 550 |  |  |  |
Total CMS Energy |  | $ | 1,000 |  |  |  |
Debt retirements |  |  |  |  |
CMS Energy, parent only |  |  |  |  |
Term loan facility |  | $ | 180 |  | variable |  | March 2018 | December 2018
Senior notes 2 |  | 100 |  | 8.75 | % | June 2018 | June 2019
Term loan facility |  | 45 |  | variable |  | August 2018 | December 2018
Total CMS Energy, parent only |  | $ | 325 |  |  |  |
Consumers |  |  |  |  |
Tax-exempt pollution control revenue bonds |  | $ | 68 |  | various |  | April 2018 | April 2018
First mortgage bonds |  | 250 |  | 5.65 | % | May 2018 | September 2018
Total Consumers |  | $ | 318 |  |  |  |
Total CMS Energy |  | $ | 643 |  |  |  |
1 | These unsecured obligations rank subordinate and junior in right of payment to all of CMS Energy’s existing and future senior indebtedness.
2 | CMS Energy retired these senior notes at a premium and recorded a loss on extinguishment of $5 million in other expense on its consolidated statements of income.
Revolving Credit Facilities | Revolving Credit Facilities: The following revolving credit facilities with banks were available at September 30, 2018:
In Millions |
Expiration Date | Amount of Facility |  | Amount Borrowed |  | Letters of Credit Outstanding |  | Amount Available |
CMS Energy, parent only |  |  |  |  |  |  |  |
June 5, 2023 1 |  | $ | 550 |  |  | $ | — |  |  | $ | 9 |  |  | $ | 541 |
Consumers |  |  |  |  |  |  |  |
June 5, 2023 2,3 |  | $ | 850 |  |  | $ | — |  |  | $ | 7 |  |  | $ | 843 |
November 23, 2019 3 |  | 250 |  |  | — |  |  | 25 |  |  | 225 |
September 9, 2019 3 |  | 30 |  |  | — |  |  | 30 |  |  | — |
1 | In June 2018, CMS Energy amended this revolving credit facility, eliminating the security provided by Consumers common stock, and extending the expiration date to June 2023.
2 | In June 2018, Consumers amended this revolving credit facility by increasing its borrowing capacity to $850 million and extending the expiration date to June 2023.
3 | Obligations under this facility are secured by first mortgage bonds of Consumers.

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