Significant Accounting Policies (Income Taxes) (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Income Taxes [Line Items]
Effective Tax Rate	(146.00%)	1.00%	(1.00%)	(1.00%)
DTE Electric
Schedule of Income Taxes [Line Items]
Effective Tax Rate	2.00%	10.00%	2.00%	10.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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Data Type:	dtr-types:percentItemType
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Period Type:	duration