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- Definition

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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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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 ($) $ in Millions		1 Months Ended	12 Months Ended
	Nov. 01, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2022	Sep. 30, 2022	Aug. 31, 2022	Mar. 17, 2022	Feb. 28, 2022
Debt Instrument [Line Items]
Amount			$ 2,196
Redemption of long-term debt	$ 1,250		1,587	$ 3,522	$ 882
Unsecured \| June 2022 Unsecured Term Loan Maturing In December 2023
Debt Instrument [Line Items]
Amount			200			$ 200		$ 400
DTE Electric
Debt Instrument [Line Items]
Redemption of long-term debt			$ 337	$ 321	$ 632
DTE Electric \| DTE Energy
Debt Instrument [Line Items]
Payments of special dividend		$ 115
DTE Electric \| Securitization Bonds
Debt Instrument [Line Items]
Amount									$ 236
DTE Electric \| Securitization Bonds \| March 2022 2.64% Securitization Bonds Due 2027
Debt Instrument [Line Items]
Interest Rate		2.64%
Amount		$ 184
DTE Electric \| Securitization Bonds \| March 2022 3.11% Securitization Bonds Due 2036
Debt Instrument [Line Items]
Interest Rate		3.11%
Amount		$ 52
DTE Electric \| Mortgage Bonds \| February 2022 3.00% Mortgage Bonds Maturing in 2032
Debt Instrument [Line Items]
Interest Rate										3.00%
Amount										$ 500
DTE Electric \| Mortgage Bonds \| February 2022 3.65% Mortgage Bonds Maturing In 2052
Debt Instrument [Line Items]
Interest Rate										3.65%
Amount										$ 400
DTE Electric \| Mortgage Bonds \| 2012 Series A Mortgage Bonds
Debt Instrument [Line Items]
Redemption of long-term debt		$ 115
DTE Gas \| Mortgage Bonds \| September 2022 4.76% Mortgage Bonds Due 2032
Debt Instrument [Line Items]
Interest Rate							4.76%
Amount							$ 130
DTE Gas \| Mortgage Bonds \| September 2022 5.05% Mortgage Bonds Due 2052
Debt Instrument [Line Items]
Interest Rate							5.05%
Amount							$ 130