CMS Energy Corporation Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities
Net Income	$ 1,002	$ 947	$ 808
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,306	1,240	1,180
Deferred income taxes and investment tax credits	202	142	157
Bad debt expense	40	33	34
Postretirement benefits contributions	(16)	(13)	(12)
Other non‑cash operating activities and reconciling adjustments	(238)	(241)	(274)
Changes in assets and liabilities
Accounts receivable and accrued revenue	(251)	(155)	241
Inventories	(28)	164	185
Accounts payable and accrued rate refunds	196	15	(136)
Other current assets and liabilities	78	42	(21)
Other non‑current assets and liabilities	(56)	196	147
Net cash provided by operating activities	2,235	2,370	2,309
Cash Flows from Investing Activities
Proceeds from sale of ASP business	0	124	0
Cost to retire property and other investing activities	(214)	(160)	(167)
Net cash used in investing activities	(4,038)	(3,054)	(3,386)
Cash Flows from Financing Activities
Proceeds from issuance of debt	3,609	1,962	3,551
Retirement of debt	(1,150)	(952)	(2,132)
Increase (decrease) in notes payable	(65)	(28)	73
Issuance of common stock	525	286	192
Payment of dividends on common and preferred stock	(663)	(626)	(579)
Contributions from noncontrolling interests	4	5	6
Distributions to noncontrolling interests	(14)	(12)	(12)
Other financing costs	(65)	(21)	(42)
Net cash provided by financing activities	2,240	614	1,143
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	437	(70)	66
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	178	248	182
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	615	178	248
Cash transactions
Interest paid (net of amounts capitalized)	741	677	607
Income taxes paid (proceeds from sale of renewable energy tax credits), net	(20)	(69)	15
Non‑cash transactions
Capital expenditures not paid	662	517	265
Deemed contribution from sale of membership interest	35	0	0
Class B Membership
Cash Flows from Financing Activities
Proceeds from the sale of membership interests in VIEs	44	0	0
Class A - Tax Equity Membership
Cash Flows from Financing Activities
Proceeds from the sale of membership interests in VIEs	15	0	86
Capital Expenditures
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(3,824)	(3,018)	(2,407)
Covert Plant Acquisition
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	$ 0	$ 0	$ (812)