Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 115	$ 33
Restricted cash	22	10
Securitized regulatory assets	197	206
Total Assets	42,518	42,683
LIABILITIES
Short-term borrowings	130	1,162
DTE Electric
ASSETS
Cash and cash equivalents	68	15
Restricted cash	21	9
Securitized regulatory assets	197	206
Total Assets	30,755	30,236
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	7	14
Restricted cash	21	9
Securitized regulatory assets	197	206
Notes receivable	81	81
Other current and long-term assets	7	14
Total Assets	313	324
LIABILITIES
Short-term borrowings	81	81
Securitization bonds	211	211
Other current and long-term liabilities	14	14
Total liabilities	306	306
Current portion of securitization bonds	39	39
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0	0
Restricted cash	21	9
Securitized regulatory assets	197	206
Notes receivable	0	0
Other current and long-term assets	2	3
Total Assets	220	218
LIABILITIES
Short-term borrowings	0	0
Securitization bonds	211	211
Other current and long-term liabilities	11	9
Total liabilities	222	220
Current portion of securitization bonds	$ 39	$ 39