Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	$ 104
Additions:
Balance at End of Period	92	$ 104
DTE Electric
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	57
Additions:
Balance at End of Period	54	57
Allowance for Doubtful Accounts
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	104	83	$ 91
Additions:
Charged to costs and expenses	54	105	103
Charged to other accounts	61	50	56
Deductions	(127)	(134)	(167)
Balance at End of Period	92	104	83
Allowance for Doubtful Accounts | DTE Electric
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	57	46	53
Additions:
Charged to costs and expenses	36	61	65
Charged to other accounts	38	30	36
Deductions	(77)	(80)	(108)
Balance at End of Period	$ 54	$ 57	$ 46