Consolidated Statements of Cash Flows (Unaudited) - DTE Energy Company - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Operating Activities
Net Income	$ 999	$ 1,093
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	1,487	1,367
Nuclear fuel amortization	34	50
Allowance for equity funds used during construction	(107)	(72)
Deferred income taxes	(200)	70
Equity (earnings) of equity method investees	(12)	(16)
Dividends from equity method investees	1	2
Asset (gains) losses and impairments, net	4	48
Changes in assets and liabilities:
Accounts receivable, net	260	252
Inventories	(120)	(304)
Prepaid postretirement benefit costs	(57)	(59)
Accounts payable	(239)	(97)
Accrued pension liability	(26)	(27)
Accrued postretirement liability	(1)	(1)
Derivative assets and liabilities	(23)	17
Regulatory assets and liabilities	371	144
Other current and noncurrent assets and liabilities	76	(106)
Net cash from operating activities	2,447	2,361
Investing Activities
Plant and equipment expenditures — utility	(4,067)	(2,999)
Plant and equipment expenditures — non-utility	(45)	(67)
Acquisition related to business combination, net of cash acquired	0	(211)
Proceeds from sale of assets	0	5
Proceeds from sale of nuclear decommissioning trust fund assets	638	592
Investment in nuclear decommissioning trust funds	(642)	(596)
Distributions from equity method investees	9	8
Investment in notes receivable	(193)	(366)
Principal collections on notes receivable	43	15
Other	(129)	(64)
Net cash used for investing activities	(4,386)	(3,683)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	2,867	4,024
Redemption of long-term debt	(230)	(1,200)
Short-term borrowings, net	(145)	(851)
Dividends paid on common stock	(701)	(653)
Other	(25)	(7)
Net cash from financing activities	1,766	1,313
Net Decrease in Cash, Cash Equivalents, and Restricted Cash	(173)	(9)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	250	88
Cash, Cash Equivalents, and Restricted Cash at End of Period	77	79
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 726	$ 441