Consolidated Statements of Cash Flows - DTE Energy Company - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Activities
Net Income	$ 1,462	$ 1,404	$ 1,397
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	1,841	1,732	1,606
Nuclear fuel amortization	67	55	59
Allowance for equity funds used during construction	(105)	(86)	(42)
Deferred income taxes	358	194	181
Equity (earnings) losses of equity method investees	(47)	(15)	(3)
Dividends from equity method investees	3	3	3
Asset (gains) losses and impairments, net	49	28	16
Changes in assets and liabilities:
Accounts receivable, net	(316)	(40)	398
Inventories	(127)	(191)	(110)
Prepaid postretirement benefit costs	(56)	(72)	(62)
Accounts payable	255	45	(306)
Accrued pension liability	21	(136)	(28)
Accrued postretirement liability	14	(68)	14
Derivative assets and liabilities	6	25	(321)
Regulatory assets and liabilities	24	586	594
Other current and noncurrent assets and liabilities	(40)	179	(176)
Net cash from operating activities	3,409	3,643	3,220
Investing Activities
Plant and equipment expenditures — utility	(4,343)	(4,399)	(3,872)
Plant and equipment expenditures — non-utility	(86)	(68)	(62)
Acquisition related to business combination, net of cash acquired	(210)	0	0
Proceeds from sale of assets	32	46	3
Proceeds from sale of nuclear decommissioning trust fund assets	717	555	681
Investment in nuclear decommissioning trust funds	(719)	(559)	(678)
Distributions from equity method investees	18	30	25
Contributions to equity method investees	(1)	(27)	(27)
Investment in notes receivable	(600)	(479)	(109)
Principal collections on notes receivable	22	30	23
Investment in time deposits	0	(1,050)	0
Redemption of time deposits	0	1,050	0
Other	(134)	(80)	(79)
Net cash used for investing activities	(5,304)	(4,951)	(4,095)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	4,429	4,533	3,167
Redemption of long-term debt	(1,291)	(2,139)	(1,616)
Short-term borrowings, net	(185)	(216)	121
Dividends paid on common stock	(871)	(810)	(752)
Other	(25)	(23)	(37)
Net cash from financing activities	2,057	1,345	883
Net Increase in Cash, Cash Equivalents, and Restricted Cash	162	37	8
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	88	51	43
Cash, Cash Equivalents, and Restricted Cash at End of Period	250	88	51
Supplemental disclosure of cash information
Interest, net of interest capitalized	978	869	751
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 570	$ 454	$ 490