Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period	$ 49
Balance at End of Period	41	$ 49
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	49	54	$ 55
Charged to costs and expenses	78	93	95
Charged to other accounts	18	14	20
Deductions	(104)	(112)	(116)
Balance at End of Period	41	49	54
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	28
Balance at End of Period	25	28
DTE Electric | 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	28	29	28
Charged to costs and expenses	49	51	50
Charged to other accounts	8	6	10
Deductions	(60)	(58)	(59)
Balance at End of Period	$ 25	$ 28	$ 29