Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents		$ 477	$ 182
Restricted cash and cash equivalents	[1]	17	17
Accounts receivable and accrued revenue, less allowance of $20 in both periods		708	1,032
Notes receivable, less allowance of $23 in 2018 and $20 in 2017		206	198
Notes receivable held for sale		0	2
Accounts receivable – related parties		14	12
Inventories at average cost
Gas in underground storage		367	458
Materials and supplies		143	133
Generating plant fuel stock		60	81
Deferred property taxes		187	257
Regulatory assets		14	20
Prepayments and other current assets		93	83
Total current assets		2,286	2,475
Plant, Property, and Equipment
Plant, property, and equipment, gross		23,258	22,506
Less accumulated depreciation and amortization		6,808	6,510
Plant, property, and equipment, net		16,450	15,996
Construction work in progress		787	765
Total plant, property, and equipment		17,237	16,761
Other Non-current Assets
Regulatory assets		1,690	1,764
Accounts and notes receivable		1,246	1,187
Investments		74	64
Other		779	799
Total other non-current assets		3,789	3,814
Total Assets		23,312	23,050
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation		1,216	1,103
Notes payable		0	170
Accounts payable		623	725
Accounts payable – related parties		6	15
Accrued rate refunds		45	33
Accrued interest		102	103
Accrued taxes		267	360
Regulatory liabilities		159	80
Other current liabilities		117	195
Total current liabilities		2,535	2,784
Non-current Liabilities
Long-term debt		9,272	9,123
Non-current portion of capital leases and financing obligation		81	91
Regulatory liabilities		3,751	3,715
Postretirement benefits		787	766
Asset retirement obligations		426	430
Deferred investment tax credit		102	87
Deferred income taxes		1,344	1,269
Other non-current liabilities		305	307
Total non-current liabilities		16,068	15,788
Commitments and contingencies
Common stockholders’ equity
Common stock, authorized 350.0 shares; outstanding 283.2 shares in 2018 and 281.6 shares in 2017		3	3
Other paid-in capital		5,076	5,019
Accumulated other comprehensive loss		(61)	(50)
Accumulated deficit		(346)	(531)
Total common stockholders’ equity		4,672	4,441
Noncontrolling interests		37	37
Total equity		4,709	4,478
Total Liabilities and Equity		23,312	23,050
Consumers Energy Company
Current Assets
Cash and cash equivalents		254	44
Restricted cash and cash equivalents	[1]	17	17
Accounts receivable and accrued revenue, less allowance of $20 in both periods		690	885
Notes receivable, less allowance of $23 in 2018 and $20 in 2017		17	17
Accounts receivable – related parties		1	2
Inventories at average cost
Gas in underground storage		367	458
Materials and supplies		138	128
Generating plant fuel stock		58	76
Deferred property taxes		187	257
Regulatory assets		14	20
Prepayments and other current assets		82	71
Total current assets		1,825	1,975
Plant, Property, and Equipment
Plant, property, and equipment, gross		23,059	22,318
Less accumulated depreciation and amortization		6,736	6,441
Plant, property, and equipment, net		16,323	15,877
Construction work in progress		763	753
Total plant, property, and equipment		17,086	16,630
Other Non-current Assets
Regulatory assets		1,690	1,764
Accounts and notes receivable		21	22
Investments		1	21
Other		660	687
Total other non-current assets		2,372	2,494
Total Assets		21,283	21,099
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation		398	365
Notes payable		0	170
Accounts payable		594	701
Accounts payable – related parties		11	19
Accrued rate refunds		45	33
Accrued interest		65	67
Accrued taxes		279	542
Regulatory liabilities		159	80
Other current liabilities		84	159
Total current liabilities		1,635	2,136
Non-current Liabilities
Long-term debt		5,738	5,561
Non-current portion of capital leases and financing obligation		81	91
Regulatory liabilities		3,751	3,715
Postretirement benefits		731	711
Asset retirement obligations		425	429
Deferred investment tax credit		102	87
Deferred income taxes		1,689	1,640
Other non-current liabilities		243	241
Total non-current liabilities		12,760	12,475
Commitments and contingencies
Common stockholders’ equity
Common stock, authorized 350.0 shares; outstanding 283.2 shares in 2018 and 281.6 shares in 2017		841	841
Other paid-in capital		4,699	4,449
Accumulated other comprehensive loss		(29)	(12)
Accumulated deficit		1,340	1,173
Total common stockholders’ equity		6,851	6,451
Preferred stock		37	37
Total equity		6,888	6,488
Total Liabilities and Equity		$ 21,283	$ 21,099

[1] 1 All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.