XML 61 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Financings And Capitalization (Narrative) (Details) (USD $) |  |  | 6 Months Ended | 1 Months Ended | 6 Months Ended |  | 6 Months Ended | 15 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2014 CMS Energy [Member] | Jun. 30, 2014 Consumers Energy Company [Member] | Jun. 30, 2014 Consumers Energy Company [Member] | Dec. 31, 2013 Consumers Energy Company [Member] | Jun. 30, 2014 Short-Term Borrowings [Member] Consumers Energy Company [Member] | Jun. 30, 2014 Continuous Equity Program [Member] | Jul. 31, 2014 Securitization Bond Due 2020 [Member] Consumers Energy Company [Member] Subsequent Event [Member] | Jul. 31, 2014 Securitization Bond Due 2025 [Member] Consumers Energy Company [Member] Subsequent Event [Member] | Jul. 31, 2014 Securitization Bond Due 2029 [Member] Consumers Energy Company [Member] Subsequent Event [Member]
Financing And Capitalization [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 7,535,000,000 | $ 7,101,000,000 |  | $ 4,555,000,000 | $ 4,555,000,000 | $ 4,579,000,000 |  |  | $ 124,000,000 | $ 139,000,000 | $ 115,000,000
Interest rate |  |  |  |  |  |  |  |  | 1.334% | 2.962% | 3.528%
Maximum allowed short term securities outstanding under FERC Authorization |  |  |  | 800,000,000 | 800,000,000 |  |  |  |  |  |
Amount of accounts receivable eligible for transfer |  |  |  |  |  |  | 250,000,000 |  |  |  |
Average short-term borrowings |  |  |  |  |  |  | 22,000,000 |  |  |  |
Weighted average annual interest rate |  |  |  |  |  |  | 0.85% |  |  |  |
Limitation on payment of stock dividends | 3,600,000,000 |  |  |  |  |  |  |  |  |  |
Unrestricted retained earnings |  |  |  | 735,000,000 | 735,000,000 |  |  |  |  |  |
Common stock dividends from Consumers |  |  | 255,000,000 |  |  |  |  |  |  |  |
Aggregate sales price of an equity offering program |  |  |  |  |  |  |  | 50,000,000 |  |  |
Accounts receivable sales facility, remaining borrowing capacity |  |  |  |  |  |  | 250,000,000 |  |  |  |
Maximum limitation on outstanding securities |  |  |  | $ 1,900,000,000 |  |  |  |  |  |  |
Expiration date of authorizations |  |  |  |  | June 30, 2016 |  |  |  |  |  |

X
- Definition The maximum borrowing capacity available for transfer under the revolving accounts receivable sales program, subject to certain eligibility requirements. + References No definition available. + Details
Name: | cms_AccountsReceivalbeSalesProgramMaximumBorrowingCapacity
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of dividends that may be paid or declared in any calendar year, limited by statutory restriction. + References No definition available. + Details
Name: | cms_AmountAvailableForDividendDistribution
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | cms_FinancingAndCapitalizationLineItems
Namespace Prefix: | cms_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum allowed short term securities outstanding + References No definition available. + Details
Name: | cms_MaximumAllowedShortTermSecuritiesOutstanding
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount of debt which can be issued under regulatory authorization. + References No definition available. + Details
Name: | cms_RegulatoryAuthorizationToIssueDebtSecurities
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Date when the regulatory debt authorization is scheduled to expire + References No definition available. + Details
Name: | cms_RegulatoryDebtAuthorizationExpirationDate
Namespace Prefix: | cms_
Data Type: | invest:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum value of new stock which can be issued in a public offering. + References No definition available. + Details
Name: | cms_StockOfferingProgramMaximumValue
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents disclosure of the aggregate cash dividends paid to the entity by consolidated subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.9-06) -URI http://asc.fasb.org/extlink&oid=6882215&loc=d3e537971-122884 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 06 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph b -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(b)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: 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 2: 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_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References No definition available. + Details
Name: | us-gaap_ShorttermDebtAverageOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average interest rate of short-term debt outstanding. + References Reference 1: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph b -Article 5 + Details
Name: | us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of dividends that can be declared or paid without approval of regulatory agency. + 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)) -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 e -Article 4 + Details
Name: | us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant