v3.25.4

Schedule I - Condensed Financial Information of Registrant (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities
Net cash provided by operating activities	$ 2,235	$ 2,370	$ 2,309
Cash Flows from Investing Activities
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
Issuance of common stock	525	286	192
Retirement of long-term debt	(1,150)	(952)	(2,132)
Increase (decrease) in notes payable	(65)	(28)	73
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
Capital Expenditures
Cash Flows from Investing Activities
Capital expenditures	(3,824)	(3,018)	(2,407)
CMS Energy
Cash Flows from Operating Activities
Net cash provided by operating activities	817	774	595
Cash Flows from Investing Activities
Investment in subsidiaries	(1,062)	(535)	(630)
Proceeds from DB SERP investments	3	0	0
Net cash used in investing activities	(1,478)	(803)	(868)
Cash Flows from Financing Activities
Proceeds from issuance of debt	2,110	490	800
Issuance of common stock	525	286	192
Retirement of long-term debt	(850)	(250)	0
Payment of dividends on common and preferred stock	(663)	(626)	(579)
Debt issuance costs and financing fees	(39)	(10)	(20)
Net cash provided by financing activities	1,086	(116)	386
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	425	(145)	113
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	4	149	36
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	429	4	149
CMS Energy | Capital Expenditures
Cash Flows from Investing Activities
Capital expenditures	(1)	(1)	0
CMS Energy | Related Party
Cash Flows from Investing Activities
Investment in debt securities – intercompany	(109)	(288)	(293)
Decrease (increase) in notes receivable – intercompany	(309)	21	55
Cash Flows from Financing Activities
Increase (decrease) in notes payable	$ 3	$ (6)	$ (7)

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