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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
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Long-Term Debt (Schedule of Debt Redeemed) (Details) - USD ($) $ in Millions	1 Months Ended				9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	May 31, 2023	Apr. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument, Redemption [Line Items]
Amount					$ 1,146	$ 316
Term Loan Facility \| June 2022 Unsecured Term Loan
Debt Instrument, Redemption [Line Items]
Amount		$ 200	$ 800
DTE Gas \| Senior Notes \| 2008 Series C 6.44% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest rate				6.44%
Amount				$ 25
DTE Electric
Debt Instrument, Redemption [Line Items]
Amount					$ 121	$ 316
DTE Electric \| Securitization Bonds \| 2.64% Securitization Bonds
Debt Instrument, Redemption [Line Items]
Interest rate		2.64%
Amount		$ 19
DTE Electric \| Mortgage Bonds \| 4.31% Mortgage Bonds
Debt Instrument, Redemption [Line Items]
Interest rate	4.31%				4.31%
Amount	$ 102