Regulatory Matters (Tables) - 2016 Electric Rate Case [Member]

9 Months Ended

Sep. 30, 2016

Public Utility, Property, Plant and Equipment [Line Items]

Schedule of Requested Annual Rate Increase

In Millions
Components of the rate increase
Investment in rate base	$	161
Operating and maintenance costs		21
Gross margin		17
Cost of capital		15
Working capital		11
Total	$	225

Consumers Energy Company [Member]

Public Utility, Property, Plant and Equipment [Line Items]

Schedule of Requested Annual Rate Increase

In Millions
Components of the rate increase
Investment in rate base	$	161
Operating and maintenance costs		21
Gross margin		17
Cost of capital		15
Working capital		11
Total	$	225