Related Party Transactions (Details Textuals) - USD ($) $ in Millions		1 Months Ended	6 Months Ended	12 Months Ended
	Jul. 01, 2021	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Cash payment to settle short-term borrowings due to DTE Energy		$ 2,537
Net cash payment for accounts receivable due from and accounts payable due to DTE Energy		$ 9
Common Stock
Related Party Transaction [Line Items]
Distribution of shares (in shares)	96,732,466
Affiliated entity
Related Party Transaction [Line Items]
Related party interest rate				3.30%	3.90%
Term of related party agreement			1 year