Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash Flows from Operating Activities
Net Income	$ 513	$ 380
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	582	537
Deferred income taxes and investment tax credits	75	95
Other non‑cash operating activities and reconciling adjustments	(29)	(5)
Pension contributions	0	(531)
Net cash provided by (used in) discontinued operations	(23)	22
Changes in assets and liabilities
Accounts and notes receivable and accrued revenue	101	132
Inventories	36	99
Accounts payable and accrued rate refunds	0	17
Other current assets and liabilities	78	13
Other non‑current assets and liabilities	34	37
Net cash provided by operating activities	1,367	796
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(878)	(944)
Net cash provided by (used in) discontinued operations	90	(167)
Cost to retire property and other investing activities	(63)	(57)
Net cash used in investing activities	(851)	(1,168)
Cash Flows from Financing Activities
Proceeds from issuance of debt	0	2,353
Retirement of debt	(18)	(392)
Decrease in notes payable	0	(90)
Issuance of common stock, net of issuance costs	20	104
Payment of dividends on common and preferred stock	(253)	(234)
Net cash provided by (used in) discontinued operations	(138)	132
Other financing costs	(20)	(54)
Net cash provided by (used in) financing activities	(409)	1,819
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	107	1,447
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	185	157
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	292	1,604
Non‑cash transactions
Capital expenditures not paid	138	167
Consumers Energy Company
Cash Flows from Operating Activities
Net Income	526	395
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	563	530
Deferred income taxes and investment tax credits	89	67
Other non‑cash operating activities and reconciling adjustments	(26)	(4)
Pension contributions	0	(518)
Changes in assets and liabilities
Accounts and notes receivable and accrued revenue	104	158
Inventories	35	99
Accounts payable and accrued rate refunds	0	18
Other current assets and liabilities	76	4
Other non‑current assets and liabilities	33	32
Net cash provided by operating activities	1,400	781
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(873)	(936)
Cost to retire property and other investing activities	(57)	(57)
Net cash used in investing activities	(930)	(993)
Cash Flows from Financing Activities
Proceeds from issuance of debt	0	1,528
Retirement of debt	(13)	(363)
Decrease in notes payable	0	(90)
Decrease in notes payable – related parties	(307)	0
Stockholder contribution	275	650
Payment of dividends on common and preferred stock	(381)	(277)
Other financing costs	(11)	(35)
Net cash provided by (used in) financing activities	(437)	1,413
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	33	1,201
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	35	28
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	68	1,229
Non‑cash transactions
Capital expenditures not paid	$ 134	$ 157