Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 150	$ 28
Restricted cash	6	7
Securitized regulatory assets	229	0
Total Assets	40,360	39,719
LIABILITIES
Short-term borrowings	244	758
DTE Electric
ASSETS
Cash and cash equivalents	49	9
Restricted cash	1	0
Securitized regulatory assets	229	0
Total Assets	28,880	28,405
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	10	11
Restricted cash	4	6
Securitized regulatory assets	229	0
Notes receivable	80	70
Other current and long-term assets	10	8
Total Assets	333	95
LIABILITIES
Short-term borrowings	82	75
Securitization bonds	230	0
Other current and long-term liabilities	7	5
Total liabilities	319	$ 80
Current portion of securitization bonds	21
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0
Restricted cash	1
Securitized regulatory assets	229
Notes receivable	0
Other current and long-term assets	2
Total Assets	232
LIABILITIES
Short-term borrowings	0
Securitization bonds	230
Other current and long-term liabilities	1
Total liabilities	231
Current portion of securitization bonds	$ 21