Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 26	$ 28
Restricted cash	25	7
Securitized regulatory assets	214	0
Total Assets	41,954	39,719
LIABILITIES
Short-term borrowings	994	758
DTE Electric
ASSETS
Cash and cash equivalents	8	9
Restricted cash	23	0
Securitized regulatory assets	214	0
Total Assets	29,767	28,405
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	10	11
Restricted cash	23	6
Securitized regulatory assets	214	0
Notes receivable	80	70
Other current and long-term assets	14	8
Total Assets	341	95
LIABILITIES
Short-term borrowings	79	75
Securitization bonds	232	0
Other current and long-term liabilities	17	5
Total liabilities	328	$ 80
Current portion of securitization bonds	40
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0
Restricted cash	23
Securitized regulatory assets	214
Notes receivable	0
Other current and long-term assets	2
Total Assets	239
LIABILITIES
Short-term borrowings	0
Securitization bonds	232
Other current and long-term liabilities	11
Total liabilities	243
Current portion of securitization bonds	$ 40