Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 36	$ 33
Restricted cash	30	10
Accounts receivable	1,393	2,038
Securitized regulatory assets	178	206
Total Assets	43,730	42,683
LIABILITIES
Accounts payable	1,135	1,604
Short-term borrowings	1,217	1,162
DTE Electric
ASSETS
Cash and cash equivalents	13	15
Restricted cash	24	9
Securitized regulatory assets	178	206
Total Assets	31,618	30,236
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	11	14
Restricted cash	28	9
Accounts receivable	115	6
Securitized regulatory assets	178	206
Notes receivable	153	81
Other current and long-term assets	2	8
Total Assets	487	324
LIABILITIES
Accounts payable	57	3
Short-term borrowings	0	81
Securitization bonds	193	211
Other current and long-term liabilities	18	11
Total liabilities	268	306
Current portion of securitization bonds	40	39
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0	0
Restricted cash	23	9
Accounts receivable	2	3
Securitized regulatory assets	178	206
Notes receivable	0	0
Other current and long-term assets	0	0
Total Assets	203	218
LIABILITIES
Accounts payable	0	0
Short-term borrowings	0	0
Securitization bonds	193	211
Other current and long-term liabilities	10	9
Total liabilities	203	220
Current portion of securitization bonds	$ 40	$ 39