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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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Long-Term Debt (Schedule of Debt Redeemed) (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument, Redemption [Line Items]
Amount			$ 316	$ 3,242
DTE Electric
Debt Instrument, Redemption [Line Items]
Amount			$ 316	$ 321
DTE Electric \| Mortgage Bonds \| 2.65% Mortgage Bonds maturing in 2022
Debt Instrument, Redemption [Line Items]
Interest rate		2.65%
Amount		$ 250
DTE Electric \| Mortgage Bonds \| 6.95% Mortgage Bonds Maturing in 2022
Debt Instrument, Redemption [Line Items]
Interest rate	6.95%		6.95%
Amount	$ 66