Effective Income Tax Rate Reconciliation, Net Operating Loss Carryback, CARES Act, Percent

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Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Amortization Of Regulatory Liability, Percent

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Increase (Decrease) in Effective Tax Rate from Prior Year, Percent

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Notes Receivable Considered Delinquent Period

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Receivables Due Date

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Significant Accounting Policies [Line Items]

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Specific Review of Probable Future Collections Based on Receivable Balances, Threshold Duration

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Significant Accounting Policies [Line Items]
Effective tax rate increase (decrease)	9.00%		0.00%
Carryback of net operating losses due to CARES Act	12.00%		5.00%
West Virginia tax law change	4.00%		1.00%
Annual production tax credits	4.00%		3.00%
Amortization of TCJA regulatory liability	3.00%		3.00%
Unrecognized compensation cost	$ 101		$ 101
Recognition period (in years)			1 year 7 months 6 days
Specific review of probable future collections based on receivable balances, threshold duration			30 days
Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	144		$ 144
Past due
Significant Accounting Policies [Line Items]
Financing receivables	0		0
Gas Storage and Pipelines \| Notes receivable
Significant Accounting Policies [Line Items]
Impairment of notes receivable	$ 19		$ 19
Minimum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period			60 days
Maximum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period			120 days
DTE Electric and DTE Gas
Significant Accounting Policies [Line Items]
Receivables due date			21 days
Threshold period past due for write-off of trade accounts receivable			150 days
DTE Electric
Significant Accounting Policies [Line Items]
Effective tax rate increase (decrease)	(2.00%)		(2.00%)
Annual production tax credits	1.00%		1.00%
Amortization of TCJA regulatory liability	1.00%		1.00%
DTE Electric \| Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	$ 16		$ 16
DTE Electric \| DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	2		2		$ 8
Allocated costs	$ 11	$ 7	$ 25	$ 16