Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	$ 91
Additions:
Balance at End of Period	91	$ 91
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	53
Additions:
Balance at End of Period	46	53
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	91	49	$ 41
Additions:
Charged to costs and expenses	111	140	80
Charged to other accounts	56	55	26
Deductions	(167)	(153)	(98)
Balance at End of Period	91	91	49
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	53	31	25
Additions:
Charged to costs and expenses	65	85	55
Charged to other accounts	36	36	14
Deductions	(108)	(99)	(63)
Balance at End of Period	$ 46	$ 53	$ 31