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Income Taxes (Summary of Loss and Credit Carryforwards) (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Operating Loss Carryforwards [Line Items] |
General business credits | $ 356
Total tax attributes | 428
Consumers Energy Company |
Operating Loss Carryforwards [Line Items] |
General business credits | 122
Total tax attributes | 175
State Tax Authority |
Operating Loss Carryforwards [Line Items] |
Local net operating loss carryforwards | 69
State Tax Authority | Consumers Energy Company |
Operating Loss Carryforwards [Line Items] |
Local net operating loss carryforwards | 53
Local Tax Authority |
Operating Loss Carryforwards [Line Items] |
Local net operating loss carryforwards | $ 3

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards and deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 + Details
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