Long-Term Debt (Details)	3 Months Ended
Mar. 31, 2017 USD ($)
Debt Instrument [Line Items]
Debt issued	$ 500,000,000
Debt redeemed	$ 5,000,000
Senior Notes \| DTE Energy \| March 2017 Senior Notes 3.80% due 2027
Debt Instrument [Line Items]
Interest rate	3.80%
Debt issued	$ 500,000,000
Other Long-Term Debt \| DTE Energy
Debt Instrument [Line Items]
Debt redeemed	$ 5,000,000

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant