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Contingencies And Commitments (Expected Remediation Cost By Year) (Details) $ in Millions | Jun. 30, 2019 USD ($)
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Bay Harbor |
Site Contingency [Line Items] |
2019 | $ 2
2020 | 4
2021 | 4
2022 | 4
2023 | 4
2024 | 4
Gas Utility | Manufactured Gas Plant | Consumers Energy Company |
Site Contingency [Line Items] |
2019 | 8
2020 | 16
2021 | 21
2022 | 7
2023 | 2
2024 | $ 2

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