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Financings And Capitalization (Tables) | 12 Months Ended
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Dec. 31, 2016
Summary Of Long-Term Debt Outstanding |
﻿ |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Interest Rate (%) |  | Maturity | 2016 | 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |  |  |
﻿Senior notes | 6.550 |  | 2017 |  | $ | - |  | $ | 250 |
﻿ | 5.050 |  | 2018 |  |  | - |  |  | 250 |
﻿ | 8.750 |  | 2019 |  |  | 300 |  |  | 300 |
﻿ | 6.250 |  | 2020 |  |  | 300 |  |  | 300 |
﻿ | 5.050 |  | 2022 |  |  | 300 |  |  | 300 |
﻿ | 3.875 |  | 2024 |  |  | 250 |  |  | 250 |
﻿ | 3.600 |  | 2025 |  |  | 250 |  |  | 250 |
﻿ | 3.000 |  | 2026 |  |  | 300 |  |  | - |
﻿ | 2.950 |  | 2027 |  |  | 275 |  |  | - |
﻿ | 4.700 |  | 2043 |  |  | 250 |  |  | 250 |
﻿ | 4.875 |  | 2044 |  |  | 300 |  |  | 300 |
﻿Total senior notes |  |  |  |  | $ | 2,525 |  | $ | 2,450 |
﻿Term loan facility | variable | 1 | 2018 |  |  | 180 |  |  | 180 |
﻿EnerBank |  |  |  |  |  |  |  |  |  |
﻿Certificates of deposit | 1.505 | 2 | 2017-2026 |  |  | 1,198 |  |  | 1,098 |
﻿Consumers |  |  |  |  |  | 5,661 |  |  | 5,409 |
﻿Total principal amount outstanding |  |  |  |  | $ | 9,564 |  | $ | 9,137 |
﻿Current amounts |  |  |  |  |  | (864) |  |  | (684) |
﻿Net unamortized discounts |  |  |  |  |  | (15) |  |  | (12) |
﻿Unamortized issuance costs |  |  |  |  |  | (45) |  |  | (41) |
﻿Total long-term debt |  |  |  |  | $ | 8,640 |  | $ | 8,400 |
﻿
| 1 |  | Outstanding borrowings bear interest at an annual interest rate of LIBOR plus 0.85 percent (1.61 percent at December 31, 2016).
| 2 |  | The weighted-average interest rate for EnerBank’s certificates of deposit was 1.51 percent at December 31, 2016 and 1.36 percent at December 31, 2015. EnerBank’s primary deposit product consists of brokered certificates of deposit with varying maturities and having a face value of $1,000.
Major Long-Term Debt Transactions |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Principal |  | Issue/Retirement |  |
﻿ | (In Millions) | Interest Rate |  | Date | Maturity Date |
﻿Debt issuances |  |  |  |  |  |  |  |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |
﻿Senior notes |  | $ | 300 | 3.000 | % | May 2016 | May 2026 |
﻿Senior notes |  |  | 275 | 2.950 |  | November 2016 | February 2027 |
﻿Total CMS Energy, parent only |  | $ | 575 |  |  |  |  |
﻿Consumers |  |  |  |  |  |  |  |
﻿First mortgage bonds |  | $ | 450 | 3.250 | % | August 2016 | August 2046 |
﻿Total Consumers |  | $ | 450 |  |  |  |  |
﻿Total CMS Energy |  | $ | 1,025 |  |  |  |  |
﻿Debt retirements |  |  |  |  |  |  |  |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |
﻿Senior notes |  | $ | 250 | 6.550 | % | December 2016 | July 2017 |
﻿Senior notes |  |  | 250 | 5.050 |  | December 2016 | February 2018 |
﻿Total CMS Energy, parent only |  | $ | 500 |  |  |  |  |
﻿Consumers |  |  |  |  |  |  |  |
﻿First mortgage bonds |  | $ | 173 | 5.500 | % | August 2016 | August 2016 |
﻿Total Consumers |  | $ | 173 |  |  |  |  |
﻿Total CMS Energy |  | $ | 673 |  |  |  |  |
﻿
Debt Maturities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | 2017 | 2018 | 2019 | 2020 | 2021 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt |  | $ | 864 |  | $ | 975 |  | $ | 1,326 |  | $ | 850 |  | $ | 103 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt |  | $ | 375 |  | $ | 523 |  | $ | 876 |  | $ | 426 |  | $ | 27 |
﻿
Revolving Credit Facilities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Amount of | Amount | Letters of Credit | Amount |
﻿Expiration Date | Facility | Borrowed | Outstanding | Available |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |  |  |  |  |  |
﻿May 27, 2021 1,3 |  | $ | 550 |  | $ | - |  | $ | 1 |  | $ | 549 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
﻿May 27, 2021 1,4 |  | $ | 650 |  | $ | - |  | $ | 7 |  | $ | 643 |
﻿November 23, 2018 2,4 |  |  | 250 |  |  | - |  |  | - |  |  | 250 |
﻿May 9, 2018 4 |  |  | 30 |  |  | - |  |  | 30 |  |  | - |
﻿
| 1 |  | In May 2016, the expiration date of this revolving credit agreement was extended from 2020 to 2021.
| 2 |  | In November 2016, the expiration date of this revolving credit agreement was extended from 2017 to 2018.
| 3 |  | During the year ended December 31, 2016, CMS Energy’s average borrowings totaled $3 million with a weighted-average interest rate of 1.68 percent. Obligations under this facility are secured by Consumers common stock.
| 4 |  | Obligations under this facility are secured by first mortgage bonds of Consumers.
﻿
Issuance Of Common Stock |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Number of | Average | Proceeds |
﻿ | Shares Issued | Price per Share | (In Millions) |
﻿2015 | 888,610 |  | $ | 33.76 |  | $ | 30 |
﻿2016 | 1,449,171 |  |  | 41.40 |  |  | 60 |
﻿Total | 2,337,781 |  | $ | 38.50 |  | $ | 90 |
﻿
Consumers Energy Company [Member] |
Summary Of Long-Term Debt Outstanding |
﻿ |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Interest Rate (%) |  | Maturity | 2016 | 2015 |
﻿Consumers |  |  |  |  |  |  |  |  |  |
﻿First mortgage bonds 1 | 5.500 |  | 2016 |  | $ | - |  | $ | 173 |
﻿ | 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 |  |  | 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 |
﻿ | 4.100 |  | 2045 |  |  | 250 |  |  | 250 |
﻿ | 3.250 |  | 2046 |  |  | 450 |  |  | - |
﻿ | 4.350 |  | 2064 |  |  | 250 |  |  | 250 |
﻿Total first mortgage bonds |  |  |  |  | $ | 5,050 |  | $ | 4,773 |
﻿Securitization bonds | 2.790 | 2 | 2020-2029 | 3 |  | 328 |  |  | 353 |
﻿Senior notes | 6.875 |  | 2018 |  |  | 180 |  |  | 180 |
﻿Tax-exempt pollution control revenue bonds | various |  | 2018-2035 |  |  | 103 |  |  | 103 |
﻿Total principal amount outstanding |  |  |  |  | $ | 5,661 |  | $ | 5,409 |
﻿Current amounts |  |  |  |  |  | (375) |  |  | (198) |
﻿Net unamortized discounts |  |  |  |  |  | (8) |  |  | (5) |
﻿Unamortized issuance costs |  |  |  |  |  | (25) |  |  | (23) |
﻿Total long-term debt |  |  |  |  | $ | 5,253 |  | $ | 5,183 |
﻿
| 1 |  | The weighted-average interest rate for Consumers’ first mortgage bonds was 4.57 percent at December 31, 2016 and 4.73 percent at December 31, 2015.
| 2 |  | The weighted-average interest rate for Consumers’ securitization bonds issued through its subsidiary Consumers 2014 Securitization Funding was 2.79 percent at December 31, 2016 and 2.69 percent at December 31, 2015.
| 3 |  | Principal and interest payments are made semiannually.
Major Long-Term Debt Transactions |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Principal |  | Issue/Retirement |  |
﻿ | (In Millions) | Interest Rate |  | Date | Maturity Date |
﻿Debt issuances |  |  |  |  |  |  |  |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |
﻿Senior notes |  | $ | 300 | 3.000 | % | May 2016 | May 2026 |
﻿Senior notes |  |  | 275 | 2.950 |  | November 2016 | February 2027 |
﻿Total CMS Energy, parent only |  | $ | 575 |  |  |  |  |
﻿Consumers |  |  |  |  |  |  |  |
﻿First mortgage bonds |  | $ | 450 | 3.250 | % | August 2016 | August 2046 |
﻿Total Consumers |  | $ | 450 |  |  |  |  |
﻿Total CMS Energy |  | $ | 1,025 |  |  |  |  |
﻿Debt retirements |  |  |  |  |  |  |  |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |
﻿Senior notes |  | $ | 250 | 6.550 | % | December 2016 | July 2017 |
﻿Senior notes |  |  | 250 | 5.050 |  | December 2016 | February 2018 |
﻿Total CMS Energy, parent only |  | $ | 500 |  |  |  |  |
﻿Consumers |  |  |  |  |  |  |  |
﻿First mortgage bonds |  | $ | 173 | 5.500 | % | August 2016 | August 2016 |
﻿Total Consumers |  | $ | 173 |  |  |  |  |
﻿Total CMS Energy |  | $ | 673 |  |  |  |  |
﻿
Debt Maturities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | 2017 | 2018 | 2019 | 2020 | 2021 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt |  | $ | 864 |  | $ | 975 |  | $ | 1,326 |  | $ | 850 |  | $ | 103 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt |  | $ | 375 |  | $ | 523 |  | $ | 876 |  | $ | 426 |  | $ | 27 |
﻿
Revolving Credit Facilities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Amount of | Amount | Letters of Credit | Amount |
﻿Expiration Date | Facility | Borrowed | Outstanding | Available |
﻿CMS Energy, parent only |  |  |  |  |  |  |  |  |  |  |  |  |
﻿May 27, 2021 1,3 |  | $ | 550 |  | $ | - |  | $ | 1 |  | $ | 549 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
﻿May 27, 2021 1,4 |  | $ | 650 |  | $ | - |  | $ | 7 |  | $ | 643 |
﻿November 23, 2018 2,4 |  |  | 250 |  |  | - |  |  | - |  |  | 250 |
﻿May 9, 2018 4 |  |  | 30 |  |  | - |  |  | 30 |  |  | - |
﻿
| 1 |  | In May 2016, the expiration date of this revolving credit agreement was extended from 2020 to 2021.
| 2 |  | In November 2016, the expiration date of this revolving credit agreement was extended from 2017 to 2018.
| 3 |  | During the year ended December 31, 2016, CMS Energy’s average borrowings totaled $3 million with a weighted-average interest rate of 1.68 percent. Obligations under this facility are secured by Consumers common stock.
| 4 |  | Obligations under this facility are secured by first mortgage bonds of Consumers.
﻿
Preferred Stock |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  | Optional | Number of | Balance |
﻿ |  |  |  | Redemption | Shares | Outstanding |
﻿ | Series | Price | Outstanding | (In Millions) |
﻿December 31 |  |  |  |  |  |  |  | 2016 | 2015 |
﻿Cumulative, $100 par value, authorized 7,500,000 shares, with no mandatory redemption |  | $ | 4.50 |  | $ | 110.00 | 373,148 |  | $ | 37 |  | $ | 37 |
﻿

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