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

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- 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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- 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 ($)		4 Months Ended	6 Months Ended
Long-Term Debt (Details Textuals) - USD ($)	Jul. 01, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Aug. 31, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Face amount of loan		$ 1,700,000,000	$ 1,700,000,000
Amount drawn down on loan			1,685,000,000	$ 1,438,000,000
DTE Electric
Debt Instrument [Line Items]
Amount drawn down on loan			1,685,000,000	$ 643,000,000
First Mortgage Bonds due September 1, 2030 \| DTE Gas \| Forecast \| Mortgage Bonds
Debt Instrument [Line Items]
Face amount of loan					$ 125,000,000
Interest rate					2.35%
First Mortgage Bonds due September 1, 2050 \| DTE Gas \| Forecast \| Mortgage Bonds
Debt Instrument [Line Items]
Face amount of loan					$ 125,000,000
Interest rate					3.20%
2008 Series KT Variable Rate Senior Notes Due 2020 \| DTE Electric \| Senior Notes
Debt Instrument [Line Items]
Debt redeemed			$ 32,000,000
2008 Series KT Variable Rate Senior Notes Due 2020 \| DTE Electric \| Subsequent Event \| Senior Notes
Debt Instrument [Line Items]
Debt redeemed	$ 32,000,000
2010 Series B 3.45% Senior Notes Due 2020 \| DTE Electric \| Senior Notes
Debt Instrument [Line Items]
Interest rate		3.45%	3.45%
Debt redeemed			$ 300,000,000
2010 Series B 3.45% Senior Notes Due 2020 \| DTE Electric \| Subsequent Event \| Senior Notes
Debt Instrument [Line Items]
Interest rate	3.45%
Debt redeemed	$ 300,000,000
Unsecured term loan \| Unsecured Term Loan Maturing in March 2022
Debt Instrument [Line Items]
Face amount of loan						$ 200,000,000
Amount drawn down on loan		$ 0