Consumers Energy Company Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenue	$ 7,329	$ 6,418	$ 6,624
Operating Expenses
Operating Income	1,146	1,230	1,115
Other Income (Expense)
Interest income	3	4	7
Interest income – related parties	0	7	0
Allowance for equity funds used during construction	8	6	10
Non-operating retirement benefits, net	165	118	91
Other income	9	6	4
Other expense	(18)	(62)	(13)
Total other income	177	84	109
Interest Charges
Interest on long-term debt	481	483	439
Interest expense – related parties	12	12	9
Other interest expense	10	12	16
Allowance for borrowed funds used during construction	(3)	(2)	(4)
Total interest charges	500	505	460
Income Before Income Taxes	823	809	764
Income Tax Expense	95	115	131
Net Income Attributable to CMS Energy	1,353	755	680
Preferred Stock Dividends	5	0	0
Net Income Available to Common Stockholders	1,348	755	680
Consumers Energy Company
Operating Revenue	7,021	6,189	6,376
Operating Expenses
Fuel for electric generation	463	286	375
Purchased and interchange power	1,599	1,454	1,470
Purchased power – related parties	77	64	75
Cost of gas sold	726	568	754
Maintenance and other operating expenses	1,531	1,224	1,275
Depreciation and amortization	1,077	1,023	975
General taxes	373	349	322
Total operating expenses	5,846	4,968	5,246
Operating Income	1,175	1,221	1,130
Other Income (Expense)
Interest income	2	3	5
Interest income – related parties	5	5	5
Allowance for equity funds used during construction	8	6	10
Non-operating retirement benefits, net	155	112	85
Other income	8	5	3
Other expense	(18)	(43)	(13)
Total other income	160	88	95
Interest Charges
Interest on long-term debt	294	299	277
Interest expense – related parties	12	12	9
Other interest expense	8	11	15
Allowance for borrowed funds used during construction	(3)	(2)	(4)
Total interest charges	311	320	297
Income Before Income Taxes	1,024	989	928
Income Tax Expense	156	173	185
Net Income Attributable to CMS Energy	868	816	743
Preferred Stock Dividends	2	2	2
Net Income Available to Common Stockholders	$ 866	$ 814	$ 741