Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents		$ 969	$ 26
Restricted cash		54	25
Accounts receivable		1,407	1,632
Securitized regulatory assets		707	758
Total Assets		49,806	44,755
LIABILITIES
Accounts payable		1,290	1,361
Regulatory liabilities		179	71
DTE Electric
ASSETS
Cash and cash equivalents		14	15
Restricted cash		40	17
Securitized regulatory assets		707	758
Total Assets		34,626	32,185
LIABILITIES
Regulatory liabilities		145	49
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents		8	7
Restricted cash		54	25
Accounts receivable		37	85
Securitized regulatory assets		707	758
Notes receivable		634	183
Other current and long-term assets		1	4
Total Assets		1,441	1,062
LIABILITIES
Accounts payable		21	59
Accrued interest		4	6
Regulatory liabilities		27	8
Securitization bonds		727	769
Other current and long-term liabilities		20	12
Total liabilities		799	854
Notes receivable recorded in Current Assets-Other		12
Current portion of securitization bonds		71	64
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents		0	0
Restricted cash		40	17
Accounts receivable		7	6
Securitized regulatory assets		707	758
Notes receivable		0	0
Other current and long-term assets		0	1
Total Assets		754	782
LIABILITIES
Accounts payable		0	0
Accrued interest		4	6
Regulatory liabilities		27	8
Securitization bonds		727	769
Other current and long-term liabilities		0	0
Total liabilities		758	783
Current portion of securitization bonds		$ 71	$ 64
Variable interest entity, primary beneficiary | DTE Vantage
LIABILITIES
Increase in notes receivable due to investments related to a large industrial project	$ 306