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Long-Term Debt (Debt Redemptions) (Details) - USD ($) $ in Millions	1 Months Ended						12 Months Ended
	Dec. 31, 2023	Oct. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	May 31, 2023	Apr. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument, Redemption [Line Items]
Amount							$ 1,616	$ 1,587	$ 3,522
Long-term debt outstanding	$ 19,707						$ 19,707
Unsecured \| Term Loan Facility
Debt Instrument, Redemption [Line Items]
Amount				$ 200	$ 800
DTE Gas \| Senior Notes \| 6.44% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest Rate						6.44%
Amount						$ 25
DTE Gas \| Mortgage Bonds \| 3.64% Mortgage Bonds
Debt Instrument, Redemption [Line Items]
Interest Rate	3.64%						3.64%
Amount	$ 50
DTE Electric
Debt Instrument, Redemption [Line Items]
Amount							$ 541	$ 337	$ 321
Long-term debt outstanding	$ 11,147						$ 11,147
DTE Electric \| Senior Notes \| 5.19% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest Rate		5.19%
Amount		$ 100
DTE Electric \| Securitization Bonds \| 2.64% Securitization Bonds
Debt Instrument, Redemption [Line Items]
Interest Rate	2.64%			2.64%			2.64%
Amount	$ 20			$ 19
DTE Electric \| Mortgage Bonds \| 4.31% Mortgage Bonds
Debt Instrument, Redemption [Line Items]
Interest Rate			4.31%
Amount			$ 102
DTE Electric \| Mortgage Bonds \| 3.65% Mortgage Bonds
Debt Instrument, Redemption [Line Items]
Interest Rate	3.65%						3.65%
Amount	$ 300
Long-term debt outstanding	$ 100						$ 100