Consolidated Statements Of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Revenue	$ 1,801	$ 2,111
Operating Expenses
Fuel for electric generation	125	167
Purchased and interchange power	346	349
Purchased power - related parties	22	23
Cost of gas sold	354	589
Maintenance and other operating expenses	293	283
Depreciation and amortization	238	222
General taxes	87	81
Total operating expenses	1,465	1,714
Operating Income	336	397
Other Income (Expense)
Interest income	1	1
Allowance for equity funds used during construction	3	2
Income from equity method investees	4	4
Other income	3	3
Other expense	(3)	(4)
Total other income (expense)	8	6
Interest Charges
Interest on long-term debt	100	96
Other interest expense	7	6
Allowance for borrowed funds used during construction	(1)	(1)
Total interest charges	106	101
Income Before Income Taxes	238	302
Income Tax Expense	74	100
Net Income	$ 164	$ 202
Basic Earnings Per Average Common Share	$ 0.59	$ 0.73
Diluted Earnings Per Average Common Share	0.59	0.73
Dividends declared per common share	$ 0.31	$ 0.29
Consumers Energy Company [Member]
Operating Revenue	$ 1,723	$ 2,028
Operating Expenses
Fuel for electric generation	99	133
Purchased and interchange power	343	346
Purchased power - related parties	22	23
Cost of gas sold	351	583
Maintenance and other operating expenses	269	265
Depreciation and amortization	237	220
General taxes	85	79
Total operating expenses	1,406	1,649
Operating Income	317	379
Other Income (Expense)
Interest income	1	1
Allowance for equity funds used during construction	3	2
Other income	3	12
Other expense	(3)	(4)
Total other income (expense)	4	11
Interest Charges
Interest on long-term debt	65	63
Other interest expense	3	3
Allowance for borrowed funds used during construction	(1)	(1)
Total interest charges	67	65
Income Before Income Taxes	254	325
Income Tax Expense	82	110
Net Income	$ 172	$ 215