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Regulatory Matters (Schedule Of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, current | $ 46 | $ 42
Regulatory assets, noncurrent | 2,259 | 2,653
Regulatory liabilities, current | 146 | 151
Regulatory liability, noncurrent | 3,802 | 3,744
Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, current | 46 | 42
Regulatory assets, noncurrent | 2,259 | 2,653
Total regulatory assets | 2,305 | 2,695
Regulatory liabilities, current | 146 | 151
Regulatory liability, noncurrent | 3,802 | 3,744
Total regulatory liabilities | 3,948 | 3,895
Income taxes, net | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liabilities, current | 138 | 105
Regulatory liability, noncurrent | 1,297 | 1,419
Reserve for customer refunds | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liabilities, current | 2 | 28
Voluntary transmission asset sale gain share | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liabilities, current | 0 | 14
Other | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liabilities, current | 6 | 4
Regulatory liability, noncurrent | 16 | 11
Postretirement benefits | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liability, noncurrent | 54 | 0
Cost of removal | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liability, noncurrent | 2,375 | 2,245
Renewable energy grant | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liability, noncurrent | 47 | 49
Renewable energy plan | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liability, noncurrent | 13 | 9
ARO | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liability, noncurrent | 0 | 11
Energy Waste Reduction Plan Incentive | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, current | 42 | 34
Regulatory assets, noncurrent | 46 | 42
Deferred capital spending | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, current | 0 | 6
Other | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, current | 4 | 2
Regulatory assets, noncurrent | 19 | 11
Postretirement benefits | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 837 | 1,231
Costs of coal-fueled electric generating units to be retired | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 678 | 678
ARO | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 247 | 216
Securitized costs | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 193 | 221
Manufactured Gas Plant | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 112 | 120
Unamortized Loss On Reacquired Debt | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 104 | 108
Energy Waste Reduction Plan | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | 13 | 16
Demand response program | Consumers Energy Company |  |
Public Utilities, General Disclosures [Line Items] |  |
Regulatory assets, noncurrent | $ 10 | $ 10

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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