Amount borrowed under the financing agreement as of the balance sheet date.

No definition available.

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- Definition

Maximum borrowing capacity under the financing agreement without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the agreement.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Maximum Additional Margin Financing

+ References

No definition available.

+ Details

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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- Details

Name:	us-gaap_DebtInstrumentAxis=dte_DemandFinancingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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- Details

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- Details

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- Details

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Short-Term Credit Arrangements and Borrowings (Details Textuals) (USD $)	1 Months Ended
	Apr. 24, 2015	Mar. 31, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		$ 2,025,000,000
Other outstanding letters of credit		255,000,000us-gaap_LineOfCredit
Letter of Credit
Short-term Debt [Line Items]
Other outstanding letters of credit		255,000,000
DTE Energy
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.50
Maximum borrowing capacity, line of credit		1,425,000,000
Other outstanding letters of credit		255,000,000
DTE Energy \| Letter of Credit
Short-term Debt [Line Items]
Other outstanding letters of credit		255,000,000
DTE Energy \| Demand Financing Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		100,000,000
Maximum additional margin financing		50,000,000
Amount outstanding		74,000,000	37,000,000
DTE Energy \| Demand Financing Agreement Plus Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		150,000,000
DTE Electric
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.52
Maximum borrowing capacity, line of credit		300,000,000
Other outstanding letters of credit		0
DTE Electric \| Letter of Credit
Short-term Debt [Line Items]
Other outstanding letters of credit		0
DTE Gas
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.47
Maximum borrowing capacity, line of credit		300,000,000
Other outstanding letters of credit		0
DTE Gas \| Letter of Credit
Short-term Debt [Line Items]
Other outstanding letters of credit		0
Unsecured letter of credit facility, expiring in February 2017 \| Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		100,000,000
Unsecured letter of credit facility, expiring in February 2017 \| DTE Energy \| Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		100,000,000
Unsecured letter of credit facility, expiring in February 2017 \| DTE Electric \| Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		0
Unsecured letter of credit facility, expiring in February 2017 \| DTE Gas \| Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		0
Unsecured revolving credit facility, expiring April 2020 \| Revolving Credit Facility \| Subsequent Event
Short-term Debt [Line Items]
Term of revolving credit agreement	5 years
Unsecured revolving credit facility, expiring April 2020 \| DTE Electric \| Revolving Credit Facility \| Subsequent Event
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit	400,000,000
Unsecured revolving credit facility, expiring April 2018 \| Revolving Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		1,800,000,000
Unsecured revolving credit facility, expiring April 2018 \| DTE Energy \| Revolving Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		1,200,000,000
Unsecured revolving credit facility, expiring April 2018 \| DTE Electric \| Revolving Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		300,000,000
Unsecured revolving credit facility, expiring April 2018 \| DTE Gas \| Revolving Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity, line of credit		300,000,000
Other outstanding letters of credit [Member] \| DTE Energy \| Letter of Credit
Short-term Debt [Line Items]
Other outstanding letters of credit		35,000,000
Demand Financing Agreement \| DTE Energy \| Letter of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		$ 50,000,000
Maximum
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.65