CMS Energy Corporation Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities
Net Income	$ 1,330	$ 752	$ 682
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,114	1,043	989
Deferred income taxes and investment tax credits	249	170	150
Bad debt expense	22	30	30
Postretirement benefits contributions	(12)	(712)	(10)
Other non‑cash operating activities and reconciling adjustments	(70)	(15)	(55)
Net cash provided by (used in) discontinued operations	(111)	33	39
Changes in assets and liabilities
Accounts receivable and accrued revenue	(103)	(5)	48
Inventories	(93)	28	44
Accounts payable and accrued rate refunds	153	56	(71)
Other current assets and liabilities	13	(68)	(93)
Other non‑current assets and liabilities	(16)	(36)	37
Net cash provided by operating activities	1,819	1,276	1,790
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(2,076)	(2,311)	(2,097)
Net proceeds from sale of EnerBank	898	0	0
Proceeds from sale of transmission equipment	0	58	97
Net cash provided by (used in) discontinued operations	78	(485)	(689)
Cost to retire property and other investing activities	(133)	(129)	(127)
Net cash used in investing activities	(1,233)	(2,867)	(2,816)
Cash Flows from Financing Activities
Proceeds from issuance of debt	335	3,179	2,151
Retirement of debt	(235)	(2,010)	(1,285)
Decrease in notes payable	0	(90)	(7)
Issuance of common stock, net of issuance costs	26	253	12
Issuance of preferred stock, net of issuance costs	224	0	0
Payment of dividends on common and preferred stock	(509)	(467)	(436)
Debt prepayment costs	0	(59)	(8)
Proceeds from the sale of membership interest in VIE to tax equity investor	0	417	0
Contribution from noncontrolling interest	1	31	0
Net cash provided by (used in) discontinued operations	(84)	416	631
Other financing costs	(53)	(51)	(50)
Net cash provided by (used in) financing activities	(295)	1,619	1,008
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	291	28	(18)
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	185	157	175
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	476	185	157
Cash transactions
Interest paid (net of amounts capitalized)	489	549	498
Income taxes paid (refunds received), net	16	(58)	(58)
Non‑cash transactions
Capital expenditures not paid	196	141	170
Discontinued Operations | EnerBank
Adjustments to reconcile net income to net cash provided by operating activities
Gain from sale of EnerBank	$ (657)	$ 0	$ 0