Consolidated Statements of Cash Flows - DTE Electric Company - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net Income	$ 1,397	$ 1,083	$ 907
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	1,606	1,468	1,377
Nuclear fuel amortization	59	42	58
Allowance for equity funds used during construction	(42)	(29)	(27)
Deferred income taxes	181	44	(32)
Asset (gains) losses and impairments, net	16	(5)	50
Changes in assets and liabilities:
Accounts receivable, net	398	(352)	(146)
Inventories	(110)	(98)	(153)
Accounts payable	(306)	109	308
Regulatory assets and liabilities	594	(766)	862
Other current and noncurrent assets and liabilities	(176)	323	(153)
Net cash from operating activities	3,220	1,977	3,067
Investing Activities
Proceeds from Sale and Maturity of Other Investments	681	879	1,047
Investment in nuclear decommissioning trust funds	(678)	(878)	(1,046)
Net cash used for investing activities	(4,095)	(3,431)	(3,863)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	3,167	2,171	4,457
Redemption of long-term debt	(1,616)	(1,587)	(3,522)
Short-term borrowings, net — affiliates	121	404	720
Dividends paid on common stock	(752)	(685)	(791)
Other	(38)	(82)	(84)
Net cash from financing activities	883	1,462	315
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	8	8	(481)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	43	35	516
Cash, Cash Equivalents, and Restricted Cash at End of Period	51	43	35
Supplemental disclosure of cash information
Cash paid (received) for: Interest, net of interest capitalized	751	638	671
Cash paid (received) for: Income taxes	(5)	(3)	(3)
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	490	435	353
DTE Electric
Operating Activities
Net Income	772	955	866
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	1,326	1,204	1,109
Nuclear fuel amortization	59	42	58
Allowance for equity funds used during construction	(40)	(26)	(25)
Deferred income taxes	82	25	122
Asset (gains) losses and impairments, net	26	8	1
Changes in assets and liabilities:
Accounts receivable, net	(14)	(40)	68
Inventories	(99)	(26)	(11)
Prepaid postretirement benefit costs — affiliates	(33)	57	(67)
Accounts payable	(9)	23	65
Accrued pension liability — affiliates	(53)	(18)	(326)
Accrued postretirement liability — affiliates	15	(65)	(44)
Regulatory assets and liabilities	461	(653)	716
Other current and noncurrent assets and liabilities	(218)	204	(216)
Net cash from operating activities	2,275	1,690	2,316
Investing Activities
Plant and equipment expenditures	(3,089)	(2,626)	(3,017)
Proceeds from Sale and Maturity of Other Investments	681	879	1,047
Investment in nuclear decommissioning trust funds	(678)	(878)	(1,046)
Notes receivable and other	(47)	(40)	(31)
Net cash used for investing activities	(3,133)	(2,665)	(3,047)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,881	1,118	985
Redemption of long-term debt	(541)	(337)	(321)
Capital contribution by parent company	759	600	555
Dividends paid on common stock	(1,002)	(763)	(588)
Other	(21)	(17)	(12)
Net cash from financing activities	866	990	724
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	8	15	(7)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	24	9	16
Cash, Cash Equivalents, and Restricted Cash at End of Period	32	24	9
Supplemental disclosure of cash information
Cash paid (received) for: Interest, net of interest capitalized	409	350	321
Cash paid (received) for: Income taxes	15	(33)	5
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	403	335	286
DTE Electric | Affiliates
Financing Activities
Short-term borrowings, net — affiliates	(27)	(26)	(48)
DTE Electric | Customer/ Other
Financing Activities
Short-term borrowings, net — affiliates	$ (183)	$ 415	$ 153