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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 (Schedule of Issued Debt) (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Aug. 31, 2022	Mar. 17, 2022	Feb. 28, 2022
Debt Instrument [Line Items]
Amount		$ 1,796
Redemption of long-term debt		316	$ 3,242
Term Loan Facility \| June 2022 Unsecured Term Loan Maturing in December 2023
Debt Instrument [Line Items]
Amount				$ 400
DTE Electric
Debt Instrument [Line Items]
Redemption of long-term debt		$ 316	$ 321
DTE Electric \| Parent
Debt Instrument [Line Items]
Payments of special dividend	$ 115
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 Electric \| Securitization Bonds
Debt Instrument [Line Items]
Amount					$ 236
DTE Electric \| Securitization Bonds \| March 2022 2.64% Securitization Bonds Maturing in 2027
Debt Instrument [Line Items]
Interest rate	2.64%
Amount	$ 184
DTE Electric \| Securitization Bonds \| March 2022 3.11% Securitization Bonds Maturing in 2036
Debt Instrument [Line Items]
Interest rate	3.11%
Amount	$ 52
DTE Gas \| Mortgage Bonds \| September 2022 4.76% Mortgage Bonds Maturing in 2032
Debt Instrument [Line Items]
Interest rate		4.76%
Amount		$ 130
DTE Gas \| Mortgage Bonds \| September 2022 5.05% Mortgage Bonds Maturing in 2052
Debt Instrument [Line Items]
Interest rate		5.05%
Amount		$ 130