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v2.4.1.9

Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Current Assets |  |  |  |
Cash and cash equivalents | $ 207 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 172 us-gaap_CashAndCashEquivalentsAtCarryingValue |
Restricted cash and cash equivalents | 37 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue |  | 32 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue |
Accounts receivable and accrued revenue, less allowances | 881 us-gaap_AccountsReceivableNetCurrent |  | 914 us-gaap_AccountsReceivableNetCurrent |
Notes receivable | 98 us-gaap_NotesAndLoansReceivableNetCurrent |  | 63 us-gaap_NotesAndLoansReceivableNetCurrent |
Notes receivable held for sale | 41 us-gaap_LoansReceivableHeldForSaleAmount |  |  |
Accounts receivable - related parties | 11 us-gaap_DueFromRelatedPartiesCurrent |  | 10 us-gaap_DueFromRelatedPartiesCurrent |
Accrued gas revenue | 27 us-gaap_DeferredFuelCost |  |  |
Inventories at average cost |  |  |  |
Gas in underground storage | 681 us-gaap_EnergyRelatedInventoryGasStoredUnderground |  | 660 us-gaap_EnergyRelatedInventoryGasStoredUnderground |
Materials and supplies | 117 us-gaap_OtherInventorySupplies |  | 107 us-gaap_OtherInventorySupplies |
Generating plant fuel stock | 120 us-gaap_EnergyRelatedInventoryOtherFossilFuel |  | 114 us-gaap_EnergyRelatedInventoryOtherFossilFuel |
Deferred income taxes |  |  | 126 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent |
Deferred property taxes | 216 cms_DeferredPropertyTaxes |  | 202 cms_DeferredPropertyTaxes |
Regulatory assets | 89 us-gaap_RegulatoryAssetsCurrent |  | 40 us-gaap_RegulatoryAssetsCurrent |
Prepayments and other current assets | 72 us-gaap_OtherAssetsCurrent |  | 86 us-gaap_OtherAssetsCurrent |
Total current assets | 2,597 us-gaap_AssetsCurrent |  | 2,526 us-gaap_AssetsCurrent |
Plant, Property, and Equipment |  |  |  |
Plant, property, and equipment, gross | 17,721 cms_PropertyPlantAndEquipmentGrossExcludingCWIP |  | 16,184 cms_PropertyPlantAndEquipmentGrossExcludingCWIP |
Less accumulated depreciation and amortization | 5,415 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |  | 5,087 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |
Plant, property, and equipment, net | 12,306 cms_PropertyPlantAndEquipmentNetExcludingCWIP |  | 11,097 cms_PropertyPlantAndEquipmentNetExcludingCWIP |
Construction work in progress | 1,106 us-gaap_ConstructionInProgressGross |  | 1,149 us-gaap_ConstructionInProgressGross |
Total plant, property, and equipment | 13,412 us-gaap_PropertyPlantAndEquipmentNet | [1] | 12,246 us-gaap_PropertyPlantAndEquipmentNet | [1]
Other Non-current Assets |  |  |  |
Regulatory assets | 1,956 us-gaap_RegulatoryAssetsNoncurrent |  | 1,530 us-gaap_RegulatoryAssetsNoncurrent |
Accounts and notes receivable, less allowances | 807 us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent |  | 646 us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent |
Investments | 61 us-gaap_EquityMethodInvestments | [2] | 59 us-gaap_EquityMethodInvestments | [2]
Other | 352 us-gaap_OtherAssetsNoncurrent |  | 409 us-gaap_OtherAssetsNoncurrent |
Total other non-current assets | 3,176 us-gaap_AssetsNoncurrent |  | 2,644 us-gaap_AssetsNoncurrent |
Total Assets | 19,185 us-gaap_Assets |  | 17,416 us-gaap_Assets |
Current Liabilities |  |  |  |
Current portion of long-term debt, capital leases, and financing obligation | 540 us-gaap_DebtCurrent |  | 562 us-gaap_DebtCurrent |
Notes payable | 60 us-gaap_NotesPayableCurrent |  | 170 us-gaap_NotesPayableCurrent |
Accounts payable | 678 us-gaap_AccountsPayableCurrent |  | 585 us-gaap_AccountsPayableCurrent |
Accounts payable - related parties | 10 us-gaap_DueToRelatedPartiesCurrent |  | 10 us-gaap_DueToRelatedPartiesCurrent |
Accrued rate refunds | 6 cms_AccruedRateRefunds |  | 12 cms_AccruedRateRefunds |
Accrued interest | 108 us-gaap_InterestAndDividendsPayableCurrent |  | 96 us-gaap_InterestAndDividendsPayableCurrent |
Accrued taxes | 316 us-gaap_TaxesPayableCurrent |  | 297 us-gaap_TaxesPayableCurrent |
Deferred income taxes | 66 us-gaap_DeferredTaxLiabilitiesCurrent |  |  |
Regulatory liabilities | 67 us-gaap_RegulatoryLiabilityCurrent |  | 67 us-gaap_RegulatoryLiabilityCurrent |
Other current liabilities | 163 us-gaap_OtherLiabilitiesCurrent |  | 146 us-gaap_OtherLiabilitiesCurrent |
Total current liabilities | 2,014 us-gaap_LiabilitiesCurrent |  | 1,945 us-gaap_LiabilitiesCurrent |
Non-current Liabilities |  |  |  |
Long-term debt | 8,016 us-gaap_LongTermDebtNoncurrent |  | 7,101 us-gaap_LongTermDebtNoncurrent |
Non-current portion of capital leases and financing obligation | 123 us-gaap_CapitalLeaseObligationsNoncurrent |  | 138 us-gaap_CapitalLeaseObligationsNoncurrent |
Regulatory liabilities | 2,095 us-gaap_RegulatoryLiabilityNoncurrent |  | 2,215 us-gaap_RegulatoryLiabilityNoncurrent |
Postretirement benefits | 872 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent |  | 239 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent |
Asset retirement obligations | 340 us-gaap_AssetRetirementObligationsNoncurrent |  | 325 us-gaap_AssetRetirementObligationsNoncurrent |
Deferred investment tax credit | 37 us-gaap_AccumulatedDeferredInvestmentTaxCredit |  | 40 us-gaap_AccumulatedDeferredInvestmentTaxCredit |
Deferred income taxes | 1,682 us-gaap_DeferredTaxLiabilitiesNoncurrent |  | 1,616 us-gaap_DeferredTaxLiabilitiesNoncurrent |
Other non-current liabilities | 299 us-gaap_OtherLiabilitiesNoncurrent |  | 306 us-gaap_OtherLiabilitiesNoncurrent |
Total non-current liabilities | 13,464 us-gaap_LiabilitiesNoncurrent |  | 11,980 us-gaap_LiabilitiesNoncurrent |
Commitments and Contingencies (Notes 3, 4, 5, and 7) |  |  |  |
Equity |  |  |  |
Common stock | 3 us-gaap_CommonStockValue |  | 3 us-gaap_CommonStockValue |
Other paid-in capital | 4,774 us-gaap_AdditionalPaidInCapitalCommonStock |  | 4,715 us-gaap_AdditionalPaidInCapitalCommonStock |
Accumulated other comprehensive loss | (49)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  | (22)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |
Retained earnings (Accumulated deficit) | (1,058)us-gaap_RetainedEarningsAccumulatedDeficit |  | (1,242)us-gaap_RetainedEarningsAccumulatedDeficit |
Total common stockholders' equity | 3,670 us-gaap_StockholdersEquity |  | 3,454 us-gaap_StockholdersEquity |
Noncontrolling interests | 37 us-gaap_MinorityInterest |  | 37 us-gaap_MinorityInterest |
Total equity | 3,707 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | 3,491 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |
Total Liabilities and Equity | 19,185 us-gaap_LiabilitiesAndStockholdersEquity |  | 17,416 us-gaap_LiabilitiesAndStockholdersEquity |
Consumers Energy Company [Member] |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 71 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 18 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Restricted cash and cash equivalents | 37 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 31 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accounts receivable and accrued revenue, less allowances | 863 us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 902 us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Notes receivable |  |  | 14 us-gaap_NotesAndLoansReceivableNetCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accounts receivable - related parties | 1 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 4 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accrued gas revenue | 27 us-gaap_DeferredFuelCost / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  |  |
Inventories at average cost |  |  |  |
Gas in underground storage | 681 us-gaap_EnergyRelatedInventoryGasStoredUnderground / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 653 us-gaap_EnergyRelatedInventoryGasStoredUnderground / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Materials and supplies | 113 us-gaap_OtherInventorySupplies / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 103 us-gaap_OtherInventorySupplies / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Generating plant fuel stock | 112 us-gaap_EnergyRelatedInventoryOtherFossilFuel / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 113 us-gaap_EnergyRelatedInventoryOtherFossilFuel / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Deferred property taxes | 216 cms_DeferredPropertyTaxes / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 202 cms_DeferredPropertyTaxes / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Regulatory assets | 89 us-gaap_RegulatoryAssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember | [3] | 40 us-gaap_RegulatoryAssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember | [3]
Prepayments and other current assets | 63 us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 77 us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total current assets | 2,273 us-gaap_AssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 2,157 us-gaap_AssetsCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Plant, Property, and Equipment |  |  |  |
Plant, property, and equipment, gross | 17,580 cms_PublicUtilitiesPropertyPlantAndEquipmentGrossExcludingCWIP / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 16,044 cms_PublicUtilitiesPropertyPlantAndEquipmentGrossExcludingCWIP / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Less accumulated depreciation and amortization | 5,346 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 5,022 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Plant, property, and equipment, net | 12,234 cms_PublicUtilitiesPropertyPlantAndEquipmentNetExcludingCWIP / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 11,022 cms_PublicUtilitiesPropertyPlantAndEquipmentNetExcludingCWIP / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Construction work in progress | 1,103 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 1,147 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total plant, property, and equipment | 13,337 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember | [1] | 12,169 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember | [1]
Other Non-current Assets |  |  |  |
Regulatory assets | 1,956 us-gaap_RegulatoryAssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 1,530 us-gaap_RegulatoryAssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accounts and notes receivable, less allowances | 7 us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 11 us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Investments | 38 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 29 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Other | 236 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 283 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total other non-current assets | 2,237 us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 1,853 us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total Assets | 17,847 us-gaap_Assets / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 16,179 us-gaap_Assets / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Current Liabilities |  |  |  |
Current portion of long-term debt, capital leases, and financing obligation | 145 us-gaap_DebtCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 64 us-gaap_DebtCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Notes payable | 60 us-gaap_NotesPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 170 us-gaap_NotesPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accounts payable | 662 us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 571 us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accounts payable - related parties | 12 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 13 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accrued rate refunds | 6 cms_AccruedRateRefunds / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 12 cms_AccruedRateRefunds / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accrued interest | 70 us-gaap_InterestAndDividendsPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 63 us-gaap_InterestAndDividendsPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accrued taxes | 149 us-gaap_TaxesPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 353 us-gaap_TaxesPayableCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Deferred income taxes | 80 us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 55 us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Regulatory liabilities | 67 us-gaap_RegulatoryLiabilityCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 67 us-gaap_RegulatoryLiabilityCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Other current liabilities | 135 us-gaap_OtherLiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 112 us-gaap_OtherLiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total current liabilities | 1,386 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 1,480 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Non-current Liabilities |  |  |  |
Long-term debt | 5,154 us-gaap_LongTermDebtNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 4,579 us-gaap_LongTermDebtNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Non-current portion of capital leases and financing obligation | 123 us-gaap_CapitalLeaseObligationsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 138 us-gaap_CapitalLeaseObligationsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Regulatory liabilities | 2,095 us-gaap_RegulatoryLiabilityNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 2,215 us-gaap_RegulatoryLiabilityNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Postretirement benefits | 793 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 179 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Asset retirement obligations | 339 us-gaap_AssetRetirementObligationsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 324 us-gaap_AssetRetirementObligationsNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Deferred investment tax credit | 37 us-gaap_AccumulatedDeferredInvestmentTaxCredit / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 40 us-gaap_AccumulatedDeferredInvestmentTaxCredit / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Deferred income taxes | 2,406 us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 2,115 us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Other non-current liabilities | 237 us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 252 us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total non-current liabilities | 11,184 us-gaap_LiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 9,842 us-gaap_LiabilitiesNoncurrent / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Commitments and Contingencies (Notes 3, 4, 5, and 7) |  |  |  |
Equity |  |  |  |
Common stock | 841 us-gaap_CommonStockValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 841 us-gaap_CommonStockValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Other paid-in capital | 3,574 us-gaap_AdditionalPaidInCapitalCommonStock / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 3,257 us-gaap_AdditionalPaidInCapitalCommonStock / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Accumulated other comprehensive loss | (7)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | (2)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Retained earnings (Accumulated deficit) | 832 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 724 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total common stockholders' equity | 5,240 us-gaap_StockholdersEquity / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 4,820 us-gaap_StockholdersEquity / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Preferred stock | 37 us-gaap_PreferredStockValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 37 us-gaap_PreferredStockValue / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total equity | 5,277 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | 4,857 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
Total Liabilities and Equity | $ 17,847 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |  | $ 16,179 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = cms_ConsumersEnergyCompanyMember |
[1] | For the year ended December 31, 2014, utility plant additions were $1.6 billion and utility plant retirements were $126 million. For the year ended December 31, 2013, utility plant additions were $1.3 billion and utility plant retirements were $156 million.
[2] | Consumers had no significant equity method investments.
[3] | This regulatory asset is offset partially by liabilities. The net amount is included in rate base, thereby providing a return.

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