Long-Term Debt (Details Textuals) (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
Aug. 31, 2017	Jun. 30, 2017
Debt Instrument [Line Items]
Debt redemption		$ 6
DTE Electric \| Senior Notes \| June Senior Notes 5.60% due 2018
Debt Instrument [Line Items]
Interest rate		5.60%
DTE Electric \| Senior Notes \| June Senior Notes 5.60% due 2018 \| Scenario, Forecast
Debt Instrument [Line Items]
Debt redemption	$ 300

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant