Consolidated Statements of Cash Flows (Unaudited) - DTE Energy Company - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Operating Activities
Net Income	$ 247	$ 445
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	483	452
Nuclear fuel amortization	13	17
Allowance for equity funds used during construction	(35)	(24)
Deferred income taxes	(53)	(19)
Equity (earnings) of equity method investees	(3)	(7)
Dividends from equity method investees	0	1
Asset (gains) losses and impairments, net	2	(1)
Changes in assets and liabilities:
Accounts receivable, net	33	(61)
Inventories	144	90
Prepaid postretirement benefit costs	(28)	(27)
Accounts payable	(144)	(2)
Gas inventory equalization	125	121
Accrued pension liability	(9)	(10)
Accrued postretirement liability	(8)	(7)
Derivative assets and liabilities	81	54
Regulatory assets and liabilities	14	78
Other current and noncurrent assets and liabilities	44	(80)
Net cash from operating activities	906	1,020
Investing Activities
Plant and equipment expenditures — utility	(1,214)	(857)
Plant and equipment expenditures — non-utility	(15)	(16)
Proceeds from sale of nuclear decommissioning trust fund assets	213	139
Investment in nuclear decommissioning trust funds	(215)	(142)
Distributions from equity method investees	2	3
Investment in notes receivable	(66)	(87)
Principal collections on notes receivable	8	5
Other	(27)	(13)
Net cash used for investing activities	(1,314)	(968)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,582	1,093
Redemption of long-term debt	(16)	(365)
Short-term borrowings, net	(882)	(554)
Dividends paid on common stock	(233)	(217)
Other	(15)	(7)
Net cash from (used for) financing activities	436	(50)
Net Increase in Cash, Cash Equivalents, and Restricted Cash	28	2
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	250	88
Cash, Cash Equivalents, and Restricted Cash at End of Period	278	90
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 589	$ 375