Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 67	$ 28
Restricted cash	15	7
Securitized regulatory assets	222	0
Total Assets	41,314	39,719
LIABILITIES
Short-term borrowings	815	758
DTE Electric
ASSETS
Cash and cash equivalents	7	9
Restricted cash	9	0
Securitized regulatory assets	222	0
Total Assets	29,410	28,405
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	9	11
Restricted cash	13	6
Securitized regulatory assets	222	0
Notes receivable	84	70
Other current and long-term assets	11	8
Total Assets	339	95
LIABILITIES
Short-term borrowings	85	75
Securitization bonds	232	0
Other current and long-term liabilities	13	5
Total liabilities	330	$ 80
Current portion of securitization bonds	21
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0
Restricted cash	9
Securitized regulatory assets	222
Notes receivable	0
Other current and long-term assets	2
Total Assets	233
LIABILITIES
Short-term borrowings	0
Securitization bonds	232
Other current and long-term liabilities	5
Total liabilities	237
Current portion of securitization bonds	$ 21