Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
ASSETS
Cash and cash equivalents	$ 33	$ 24
Restricted cash	57	64
Accounts receivable	1,731	1,690
Securitized regulatory assets	673	690
Total Assets	49,555	48,846
LIABILITIES
Accounts payable	1,300	1,387
Regulatory liabilities	127	181
DTE Electric
ASSETS
Cash and cash equivalents	9	11
Restricted cash	42	48
Securitized regulatory assets	673	690
Total Assets	35,793	35,221
LIABILITIES
Regulatory liabilities	121	156
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	9	6
Restricted cash	57	64
Accounts receivable	30	27
Securitized regulatory assets	673	690
Notes receivable	661	657
Other current and long-term assets	1	1
Total Assets	1,431	1,445
LIABILITIES
Accounts payable	22	26
Accrued interest	4	12
Regulatory liabilities	24	27
Securitization bonds	691	706
Other current and long-term liabilities	23	20
Total liabilities	764	791
Notes receivable	15	14
Current portion of securitization bonds	72
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0	0
Restricted cash	42	48
Accounts receivable	4	6
Securitized regulatory assets	673	690
Notes receivable	0	0
Other current and long-term assets	0	0
Total Assets	719	744
LIABILITIES
Accounts payable	0	0
Accrued interest	4	12
Regulatory liabilities	24	27
Securitization bonds	691	706
Other current and long-term liabilities	0	0
Total liabilities	$ 719	745
Current portion of securitization bonds		$ 71