XML 134 R66.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Financings And Capitalization (Conversions Of Contingently Convertible Securities) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014
February Debt Conversion [Member] |
Debt Conversion [Line Items] |
Conversion Date | 2014-02
Principal Converted | $ 17,000,000 us-gaap_DebtConversionConvertedInstrumentAmount1 / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionOneMember
Conversion Value per $1,000 of Principal | 1,968 cms_DebtConversionConvertedInstrumentAmountPerPrincipalAmountOfNote / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionOneMember
Shares of Common Stock Issued on Settlement | 605,531 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionOneMember
Cash Paid on Settlement | 17,000,000 us-gaap_RepaymentsOfConvertibleDebt / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionOneMember
Convertible debt, interest rate | 5.50%us-gaap_DebtConversionOriginalDebtInterestRateOfDebt / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionOneMember
Convertible debt, maturity date | 2029
June Debt Conversion [Member] |
Debt Conversion [Line Items] |
Conversion Date | 2014-06
Principal Converted | 155,000,000 us-gaap_DebtConversionConvertedInstrumentAmount1 / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionTwoMember
Conversion Value per $1,000 of Principal | 2,215 cms_DebtConversionConvertedInstrumentAmountPerPrincipalAmountOfNote / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionTwoMember
Shares of Common Stock Issued on Settlement | 6,372,578 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionTwoMember
Cash Paid on Settlement | $ 155,000,000 us-gaap_RepaymentsOfConvertibleDebt / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionTwoMember
Convertible debt, interest rate | 5.50%us-gaap_DebtConversionOriginalDebtInterestRateOfDebt / us-gaap_DebtConversionByUniqueDescriptionAxis = cms_DebtConversionTwoMember
Convertible debt, maturity date | 2029

X
- Definition Debt Conversion, Converted Instrument, Amount per principal amount of note + References No definition available. + Details
Name: | cms_DebtConversionConvertedInstrumentAmountPerPrincipalAmountOfNote
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + 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 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The month and year (YYYY-MM) the financial instrument was issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + 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 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentIssuanceDateMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + 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 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtConversionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Year the original debt was scheduled to mature, in CCYY format. + 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 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionOriginalDebtDueDateOfDebtYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The rate of interest that was being paid on the original debt issue that is being converted in the noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + 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 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionOriginalDebtInterestRateOfDebt
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_RepaymentsOfConvertibleDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtConversionByUniqueDescriptionAxis=cms_DebtConversionOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtConversionByUniqueDescriptionAxis=cms_DebtConversionTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |