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

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- Definition

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

+ References

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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.

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No definition available.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Long-Term Debt (Debt Issuances) (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
Long-Term Debt (Debt Issuances) (Details) - USD ($)	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Debt Instrument [Line Items]
Amount	$ 4,535,000,000		$ 4,535,000,000
Redemption of long-term debt		$ 2,600,000,000	$ 3,522,000,000	$ 882,000,000	$ 821,000,000
Senior Notes
Debt Instrument [Line Items]
Redemption of long-term debt		$ 2,600,000,000
Junior Subordinated Debentures \| November 2021, 4.38% Junior Subordinated Debentures Maturing in 2081
Debt Instrument [Line Items]
Interest Rate						4.375%
Amount						$ 280,000,000
Junior Subordinated Debentures \| 2016, 6.00% Junior Subordinated Debentures Maturing in 2076
Debt Instrument [Line Items]
Interest Rate	6.00%		6.00%
Redemption of long-term debt	$ 280,000,000
DTE Electric
Debt Instrument [Line Items]
Redemption of long-term debt			$ 321,000,000	$ 632,000,000	$ 0
DTE Electric \| Mortgage Bonds \| March 2021 1.90% Mortgage Bonds Maturing in 2028
Debt Instrument [Line Items]
Interest Rate								1.90%
Amount								$ 575,000,000
DTE Electric \| Mortgage Bonds \| March 2021 3.25% Mortgage Bonds Maturing In 2051
Debt Instrument [Line Items]
Interest Rate								3.25%
Amount								$ 425,000,000
DT Midstream \| June 2021 Variable Rate Term Loan Maturing in 2028
Debt Instrument [Line Items]
Amount							$ 1,000,000,000
DT Midstream \| Senior Notes
Debt Instrument [Line Items]
Amount							$ 2,100,000,000
DT Midstream \| Senior Notes \| June 2021 4.125% Senior Notes Maturing in 2029
Debt Instrument [Line Items]
Interest Rate							4.125%
Amount							$ 1,100,000,000
DT Midstream \| Senior Notes \| June 2021 4.375% Senior Notes Maturing in 2031
Debt Instrument [Line Items]
Interest Rate							4.375%
Amount							$ 1,000,000,000
DTE Gas \| Mortgage Bonds \| November 2021 2.07% Mortgage Bonds Maturing in 2031
Debt Instrument [Line Items]
Interest Rate						2.07%
Amount						$ 60,000,000
DTE Gas \| Mortgage Bonds \| November 2021 2.85% Mortgage Bonds Maturing in 2051
Debt Instrument [Line Items]
Interest Rate						2.85%
Amount						$ 95,000,000