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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 835
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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

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Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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Long-Term Debt (Details Textuals) - USD ($)	1 Months Ended		3 Months Ended
Long-Term Debt (Details Textuals) - USD ($)	Apr. 28, 2020	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019
Debt Instrument [Line Items]
Face amount of loan		$ 1,100,000,000	$ 1,100,000,000
Amount drawn down on loan			1,092,000,000	$ 644,000,000
Repayment of debt			300,000,000
DTE Electric
Debt Instrument [Line Items]
Amount drawn down on loan			1,092,000,000	$ 644,000,000
Mortgage Bonds \| DTE Electric \| April 2020 2.625% Mortgage Bonds Maturing in 2031 \| Subsequent Event
Debt Instrument [Line Items]
Face amount of loan	$ 600,000,000
Interest rate	2.625%
Senior Notes \| DTE Electric \| 2010 Series B 3.45% Senior Notes Due 2020 \| Subsequent Event
Debt Instrument [Line Items]
Interest rate	3.45%
Repayment of debt	$ 300,000,000
Senior Notes \| DTE Electric \| 2008 Series KT Variable Rate Senior Notes Due 2020 \| Subsequent Event
Debt Instrument [Line Items]
Repayment of debt	$ 32,000,000
Unsecured term loan \| Unsecured Term Loan Maturing in March 2022
Debt Instrument [Line Items]
Face amount of loan		200,000,000	$ 200,000,000
Amount drawn down on loan		$ 0