Consumers Energy Company Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net Income	$ 837	$ 1,353	$ 755
Adjustments to reconcile net income to net cash provided by operating activities
Deferred income taxes and investment tax credits	89	249	170
Bad debt expense	50	22	30
Postretirement benefits contributions	(12)	(12)	(712)
Other non‑cash operating activities and reconciling adjustments	(93)	(70)	(15)
Changes in assets and liabilities
Accounts receivable and accrued revenue	(677)	(103)	(5)
Inventories	(450)	(93)	28
Accounts payable and accrued rate refunds	4	153	56
Other current assets and liabilities	14	13	(68)
Other non‑current assets and liabilities	(4)	(16)	(36)
Net cash provided by operating activities	855	1,819	1,276
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(2,374)	(2,076)	(2,311)
Proceeds from sale of transmission equipment	0	0	58
Cost to retire property and other investing activities	(107)	(133)	(129)
Net cash used in investing activities	(2,476)	(1,233)	(2,867)
Cash Flows from Financing Activities
Proceeds from issuance of debt	1,899	335	3,179
Retirement of debt	(106)	(235)	(2,010)
Increase (decrease) in notes payable	20
Increase (decrease) in notes payable		0	(90)
Payment of dividends on common and preferred stock	(546)	(509)	(467)
Debt prepayment costs	0	0	(59)
Other financing costs	(60)	(53)	(51)
Net cash provided by (used in) financing activities	1,327	(295)	1,619
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	(294)	291	28
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	476	185	157
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	182	476	185
Cash transactions
Interest paid (net of amounts capitalized)	490	489	549
Income taxes paid (refunds received), net	1	16	(58)
Non‑cash transactions
Capital expenditures not paid	228	196	141
Consumers Energy Company
Cash Flows from Operating Activities
Net Income	945	868	816
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,088	1,077	1,023
Deferred income taxes and investment tax credits	134	154	177
Bad debt expense	50	22	33
Postretirement benefits contributions	(9)	(9)	(690)
Other non‑cash operating activities and reconciling adjustments	(87)	(64)	(30)
Changes in assets and liabilities
Accounts receivable and accrued revenue	(660)	(103)	(46)
Inventories	(447)	(90)	26
Accounts payable and accrued rate refunds	(9)	140	45
Other current assets and liabilities	18	27	(78)
Other non‑current assets and liabilities	(29)	(40)	(58)
Net cash provided by operating activities	994	1,982	1,218
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(2,239)	(2,052)	(2,170)
DB SERP investment in note receivable – related party	0	0	(5)
Proceeds from sale of transmission equipment	0	0	58
Cost to retire property and other investing activities	(105)	(133)	(129)
Net cash used in investing activities	(2,344)	(2,185)	(2,246)
Cash Flows from Financing Activities
Proceeds from issuance of debt	1,799	335	1,954
Retirement of debt	(28)	(27)	(1,086)
Increase (decrease) in notes payable	20
Increase (decrease) in notes payable		0	(90)
Increase (decrease) in notes payable – related parties	(317)	85	307
Stockholder contribution	685	575	650
Payment of dividends on common and preferred stock	(771)	(724)	(639)
Debt prepayment costs	0	0	(43)
Other financing costs	(22)	(32)	(18)
Net cash provided by (used in) financing activities	1,366	212	1,035
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	16	9	7
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	44	35	28
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	60	44	35
Cash transactions
Interest paid (net of amounts capitalized)	309	298	305
Income taxes paid (refunds received), net	(2)	(10)	51
Non‑cash transactions
Capital expenditures not paid	$ 210	$ 192	$ 130