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- Definition

Income Tax Expense (Benefit), Increase (Decrease), Deferred Intercompany Gain

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- Definition

Income Tax Expense (Benefit), Increase (Decrease), Deferred Tax Remeasurement

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- Definition

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

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Increase (Decrease) in Effective Tax Rate from Prior Year, Change in Deferred Tax Valuation Allowance, Percent

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

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

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

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

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- Definition

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

Notes Receivable Considered Delinquent Period

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- Definition

Receivables Due Date

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- Definition

Significant Accounting Policies [Line Items]

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- Definition

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

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- Definition

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

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- Definition

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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- Definition

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

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- Definition

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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- Definition

The change in equity as a result of a spin-off transaction (a regular or reverse spin-off) which is based on the recorded amounts.

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Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Significant Accounting Policies [Line Items]
Reduction in accumulated other comprehensive loss due to the Separation of DT Midstream	$ (3,999)
Effective tax rate increase (decrease)	181.00%		(36.00%)
Effective tax rate increase (decrease) due to deferred tax remeasurement	133.00%		(23.00%)
Effective tax rate increase (decrease) due to annual production tax credits	51.00%		(13.00%)
Effective tax rate increase (decrease) due to amortization of TCJA regulatory liability	35.00%		(9.00%)
Effective tax rate increase (decrease) due to valuation allowance	(29.00%)		4.00%
Effective tax rate increase (decrease) due to deferred intercompany gain	(13.00%)		2.00%
Effective tax rate increase (decrease) due to net operating losses due to the CARES Act			4.00%
Effective tax rate increase (decrease) due to West Virginia tax law change			2.00%
Deferred tax expense for valuation allowance established	$ 18		$ 18
Deferred tax benefit for deferred tax remeasurement	85		85
Deferred tax expense for deferred intercompany gain recognized	9		9
Unrecognized compensation cost	76		$ 76
Recognition period (in years)			1 year 4 months 24 days
Specific review of probable future collections based on receivable balances, threshold duration			30 days
Past due
Significant Accounting Policies [Line Items]
Financing receivables	$ 0		$ 0
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)	(1.00%)		(2.00%)
Effective tax rate increase (decrease) due to annual production tax credits			(1.00%)
Effective tax rate increase (decrease) due to amortization of TCJA regulatory liability			(1.00%)
DTE Electric \| DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	$ 11		$ 11		$ 8
Allocated costs	10	$ 12	$ 35	$ 28
Accumulated Other Comprehensive Loss
Significant Accounting Policies [Line Items]
Reduction in accumulated other comprehensive loss due to the Separation of DT Midstream	$ 10