Leases - Minimum Annual Rental Commitments pre Topic 842 (Details) $ in Millions	Dec. 31, 2018 USD ($)
Capital Leases
2019	$ 14
2020	11
2021	11
2022	8
2023	6
2024 and thereafter	21
Total minimum lease payments	71
Less discount	22
Present value of minimum lease payments	49
Less current portion	9
Non-current portion	40
Operating Leases
2019	16
2020	15
2021	15
2022	8
2023	5
2024 and thereafter	38
Total minimum lease payments	97
Consumers Energy Company
Capital Leases
2019	14
2020	11
2021	11
2022	8
2023	6
2024 and thereafter	21
Total minimum lease payments	71
Less discount	22
Present value of minimum lease payments	49
Less current portion	9
Non-current portion	40
Operating Leases
2019	14
2020	14
2021	13
2022	7
2023	5
2024 and thereafter	32
Total minimum lease payments	$ 85

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Capital Leases, Future Minimum Payments Due In Year Five And Thereafter

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