Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 153	$ 182
Restricted cash and cash equivalents	21	17
Accounts receivable and accrued revenue, less allowances of $20 in both periods	964	1,032
Notes receivable, less allowances of $24 in 2018 and $20 in 2017	233	198
Notes receivable held for sale	0	2
Accounts receivable – related parties	14	12
Accrued gas revenue	16	0
Inventories at average cost
Gas in underground storage	450	458
Materials and supplies	143	133
Generating plant fuel stock	57	81
Deferred property taxes	279	257
Regulatory assets	37	20
Prepayments and other current assets	101	83
Total current assets	2,468	2,475
Plant, Property, and Equipment
Plant, property, and equipment, gross	24,400	22,506
Less accumulated depreciation and amortization	7,037	6,510
Plant, property, and equipment, net	17,363	15,996
Construction work in progress	763	765
Total plant, property, and equipment	18,126	16,761
Other Non-current Assets
Regulatory assets	1,743	1,764
Accounts and notes receivable	1,645	1,187
Investments	69	64
Other	478	799
Total other non-current assets	3,935	3,814
Total Assets	24,529	23,050
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	996	1,103
Notes payable	97	170
Accounts payable	723	725
Accounts payable – related parties	10	15
Accrued rate refunds	4	33
Accrued interest	94	103
Accrued taxes	398	360
Regulatory liabilities	155	80
Other current liabilities	147	195
Total current liabilities	2,624	2,784
Non-current Liabilities
Long-term debt	10,615	9,123
Non-current portion of capital leases and financing obligation	69	91
Regulatory liabilities	3,681	3,715
Postretirement benefits	436	766
Asset retirement obligations	432	430
Deferred investment tax credit	99	87
Deferred income taxes	1,487	1,269
Other non-current liabilities	294	307
Total non-current liabilities	17,113	15,788
Commitments and Contingencies
Common stockholders’ equity
Common stock, authorized 350.0 shares; outstanding 283.4 shares in 2018 and 281.6 shares in 2017	3	3
Other paid-in capital	5,088	5,019
Accumulated other comprehensive loss	(65)	(50)
Accumulated deficit	(271)	(531)
Total common stockholders’ equity	4,755	4,441
Noncontrolling interests	37	37
Total equity	4,792	4,478
Total Liabilities and Equity	24,529	23,050
Consumers Energy Company
Current Assets
Cash and cash equivalents	39	44
Restricted cash and cash equivalents	17	17
Accounts receivable and accrued revenue, less allowances of $20 in both periods	855	885
Notes receivable, less allowances of $24 in 2018 and $20 in 2017	0	17
Accounts receivable – related parties	15	2
Accrued gas revenue	16	0
Inventories at average cost
Gas in underground storage	450	458
Materials and supplies	137	128
Generating plant fuel stock	52	76
Deferred property taxes	279	257
Regulatory assets	37	20
Prepayments and other current assets	83	71
Total current assets	1,980	1,975
Plant, Property, and Equipment
Plant, property, and equipment, gross	23,963	22,318
Less accumulated depreciation and amortization	6,958	6,441
Plant, property, and equipment, net	17,005	15,877
Construction work in progress	756	753
Total plant, property, and equipment	17,761	16,630
Other Non-current Assets
Regulatory assets	1,743	1,764
Accounts and notes receivable	27	22
Accounts and notes receivable – related parties	104	0
Other	410	708
Total other non-current assets	2,284	2,494
Total Assets	22,025	21,099
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	48	365
Notes payable	97	170
Accounts payable	685	701
Accounts payable – related parties	14	19
Accrued rate refunds	4	33
Accrued interest	59	67
Accrued taxes	436	542
Regulatory liabilities	155	80
Other current liabilities	120	159
Total current liabilities	1,618	2,136
Non-current Liabilities
Long-term debt	6,779	5,561
Non-current portion of capital leases and financing obligation	69	91
Regulatory liabilities	3,681	3,715
Postretirement benefits	392	711
Asset retirement obligations	428	429
Deferred investment tax credit	99	87
Deferred income taxes	1,809	1,640
Other non-current liabilities	230	241
Total non-current liabilities	13,487	12,475
Commitments and Contingencies
Common stockholders’ equity
Common stock, authorized 350.0 shares; outstanding 283.4 shares in 2018 and 281.6 shares in 2017	841	841
Other paid-in capital	4,699	4,449
Accumulated other comprehensive loss	(21)	(12)
Accumulated deficit	1,364	1,173
Total common stockholders’ equity	6,883	6,451
Cumulative preferred stock, $4.50 series	37	37
Total equity	6,920	6,488
Total Liabilities and Equity	$ 22,025	$ 21,099