New Accounting Pronouncements (Details) - ASU No. 2015-03 $ in Millions	Dec. 31, 2015 USD ($)
Liability
New Accounting Pronouncement, Early Adoption [Line Items]
Debt issuance cost	$ 75
Assets
New Accounting Pronouncement, Early Adoption [Line Items]
Debt issuance cost	(75)
DTE Electric \| Liability
New Accounting Pronouncement, Early Adoption [Line Items]
Debt issuance cost	36
DTE Electric \| Assets
New Accounting Pronouncement, Early Adoption [Line Items]
Debt issuance cost	$ (36)

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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