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v3.23.1

Income Taxes (Schedule Of Effective Income Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Increase (decrease) in income taxes from: |  |
U.S. federal income tax rate | 21.00% | 21.00%
State and local income taxes, net of federal effect | (0.50%) | 5.50%
Production tax credits | (4.20%) | (4.70%)
TCJA excess deferred taxes | (3.70%) | (7.20%)
Accelerated flow-through of regulatory tax benefits | 0.00% | (4.30%)
Other, net | 0.40% | 0.00%
Effective tax rate | 13.00% | 10.30%
Consumers Energy Company |  |
Increase (decrease) in income taxes from: |  |
U.S. federal income tax rate | 21.00% | 21.00%
State and local income taxes, net of federal effect | 0.00% | 5.00%
Production tax credits | (3.60%) | (2.70%)
TCJA excess deferred taxes | (3.20%) | (6.70%)
Accelerated flow-through of regulatory tax benefits | 0.00% | (5.10%)
Other, net | (0.10%) | (0.60%)
Effective tax rate | 14.10% | 10.90%
Consumers Energy Company | Wisconsin |  |
Increase (decrease) in income taxes from: |  |
Reversal of tax reserve | $ 13 |

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