Significant Accounting Policies (Details Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Specific review of probable future collections based on receivable balances in excess of 90 days	30 days
Unbilled revenues	$ 1,522,000,000	$ 1,276,000,000
Regulatory liabilities	$ 589,000,000	610,000,000
Property maintenance accrual period	18 months
Amortization of intangible assets	$ 16,000,000	11,000,000	$ 12,000,000
Excise and sales taxes net impact on statement of operations	0
Charitable contributions	26,000,000	12,000,000	$ 25,000,000
Unbilled revenues
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 814,000,000	620,000,000
DTE Electric and DTE Gas
Significant Accounting Policies [Line Items]
Receivables due date	21 days
Threshold period past due for write-off of trade accounts receivable	150 days
DTE Electric
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 728,000,000	657,000,000
Regulatory liabilities	256,000,000	218,000,000
DTE Electric | Unbilled revenues
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 267,000,000	237,000,000
Minimum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period	60 years
Maximum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period	120 years
Public Utilities, Inventory, Natural Gas
Significant Accounting Policies [Line Items]
LIFO inventory amount	$ 45,000,000	65,000,000
Excess of replacement costs over stated LIFO value	132,000,000	60,000,000
Fermi 2 refueling outage
Significant Accounting Policies [Line Items]
Regulatory liabilities	27,000,000	4,000,000
Fermi 2 refueling outage | DTE Electric
Significant Accounting Policies [Line Items]
Regulatory liabilities	$ 27,000,000	$ 4,000,000