Long-Term Debt (Details)	9 Months Ended
Sep. 30, 2017 USD ($)
Debt Instrument [Line Items]
Debt issued	$ 1,020,000,000
Debt redeemed	$ 385,000,000
DTE Electric \| Senior Notes \| 5.60% Senior Notes due 2018
Debt Instrument [Line Items]
Interest rate	5.60%
Debt redeemed	$ 300,000,000
DTE Electric \| Mortgage Bonds \| August 2017 3.75% General and Refunding Mortgage Bonds maturing in 2047
Debt Instrument [Line Items]
Interest rate	3.75%
Debt issued	$ 440,000,000
DTE Gas \| Mortgage Bonds \| September 2017 3.08% First Mortgage Bonds maturing in 2029
Debt Instrument [Line Items]
Interest rate	3.08%
Debt issued	$ 40,000,000
DTE Gas \| Mortgage Bonds \| September 2017 3.75% First Mortgage Bonds maturing in 2047
Debt Instrument [Line Items]
Interest rate	3.75%
Debt issued	$ 40,000,000
DTE Energy \| Senior Notes \| March 2017 3.80% Senior Notes due 2027
Debt Instrument [Line Items]
Interest rate	3.80%
Debt issued	$ 500,000,000
DTE Energy \| Secured Note \| 7.29% Secured Note due 2029
Debt Instrument [Line Items]
Interest rate	7.29%
Debt redeemed	$ 77,000,000
DTE Energy \| Other Long-Term Debt
Debt Instrument [Line Items]
Debt redeemed	8,000,000
DTE Energy \| Other Long-Term Debt \| Gas Storage and Pipelines
Debt Instrument [Line Items]
Net loss on extinguishment of debt	16,000,000
Loss related to early redemption premiums	20,000,000
Unamortized debt premiums	$ 4,000,000

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
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-Section 45
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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