XML 74 R62.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Contingencies And Commitments (Guarantees) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 MW | Dec. 31, 2012 | Dec. 31, 2011
Consumers Energy Company [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Expiration Date | Various through September 2029 |  |  |
Maximum obligation | $ 30 |  |  |
Carrying Amount | 1 |  |  |
Guarantees [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Expiration Date | Various through March 2021 |  |  |
Maximum obligation | 57 |  |  |
Indemnity Obligations From Asset Sales And Other Agreements [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Expiration Date | Various through September 2029 | [1] |  |
Maximum obligation | 471 | [1] |  |
Carrying Amount | 16 | [1] |  |
Non-Related Parties [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Purchase Obligations Total | 12,068 |  |  |
Purchase Obligations Due in Year One | 1,879 |  |  |
Purchase Obligations Due in Year Two | 983 |  |  |
Purchase Obligations Due in Year Three | 1,032 |  |  |
Purchase Obligations Due in Year Four | 1,001 |  |  |
Purchase Obligations Due in Year Five | 1,006 |  |  |
Purchase Obligations Due After Year Five | 6,167 |  |  |
Non-Related Parties [Member] | Consumers Energy Company [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Purchase Obligations Total | 11,838 |  |  |
Purchase Obligations Due in Year One | 1,803 |  |  |
Purchase Obligations Due in Year Two | 955 |  |  |
Purchase Obligations Due in Year Three | 1,005 |  |  |
Purchase Obligations Due in Year Four | 974 |  |  |
Purchase Obligations Due in Year Five | 979 |  |  |
Purchase Obligations Due After Year Five | 6,122 |  |  |
Related Parties [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Purchase Obligations Total | 1,244 |  |  |
Purchase Obligations Due in Year One | 89 |  |  |
Purchase Obligations Due in Year Two | 84 |  |  |
Purchase Obligations Due in Year Three | 86 |  |  |
Purchase Obligations Due in Year Four | 88 |  |  |
Purchase Obligations Due in Year Five | 87 |  |  |
Purchase Obligations Due After Year Five | 810 |  |  |
Related Parties [Member] | Consumers Energy Company [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Purchase Obligations Total | 1,244 |  |  |
Purchase Obligations Due in Year One | 89 |  |  |
Purchase Obligations Due in Year Two | 84 |  |  |
Purchase Obligations Due in Year Three | 86 |  |  |
Purchase Obligations Due in Year Four | 88 |  |  |
Purchase Obligations Due in Year Five | 87 |  |  |
Purchase Obligations Due After Year Five | 810 |  |  |
MCV PPA [Member] | Consumers Energy Company [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Term of Unrecorded Unconditional Purchase Obligations | 35 years |  |  |
Unrecorded Unconditional Purchase Obligations, Minimum Quantity Required | 1,240 |  |  |
Unrecorded Unconditional Purchase Obligation Capacity Charge Per Mwh | 10.14 |  |  |
Unrecorded Unconditional Purchase Obligation, Annual Contribution to Renewable Resources Program By Counterparty | 5 |  |  |
Unrecorded Unconditional Purchase Obligation, Contract Extension Period | 5 years |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases | 278 |  | 319 | 292
Unrecorded Unconditional Purchase Obligation, Estimated Average Capacity and Energy Charges | 320 |  |  |
Palisades PPA [Member] | Consumers Energy Company [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases | 338 |  | 331 | 311
Unrecorded Unconditional Purchase Obligation, Estimated Average Capacity and Energy Charges | $ 370 |  |  |
Unrecorded Unconditional Purchase Obligations, Maximum Quantity | 798 |  |  |
[1] | The majority of this amount arises from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy, other than Consumers, indemnified the purchaser for losses resulting from various matters, including claims related to tax disputes, claims related to power purchase agreements, and defects in title to the assets or stock sold to the purchaser by CMS Energy subsidiaries. Except for items described elsewhere in this Note, CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities

X
- Definition Describes the term of the unconditional purchase obligations that are not recorded as a liability on the balance sheet. + References No definition available. + Details
Name: | cms_TermOfUnrecordedUnconditionalPurchaseObligations
Namespace Prefix: | cms_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual contribution to be paid by counterparty to a renewable resources program. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationAnnualContributionToRenewableResourcesProgramByCounterparty
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The price per MWh of available capacity that must be paid, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationCapacityChargePerMwh
Namespace Prefix: | cms_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Specifies length of time the contract can be extended at the end of the contract term. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationContractExtensionPeriod
Namespace Prefix: | cms_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual average capacity and energy charges estimated per year under the contract. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationEstimatedAverageCapacityAndEnergyCharges
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum number of power units that may be acquired, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationsMaximumQuantity
Namespace Prefix: | cms_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum number of units that must be purchased, in connection with unconditional purchase obligations that have not been recognized for financial reporting purposes. + References No definition available. + Details
Name: | cms_UnrecordedUnconditionalPurchaseObligationsMinimumQuantityRequired
Namespace Prefix: | cms_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Describe the approximate term of the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the four fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration