Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Amortization of Regulatory Liability, Percent

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Income Taxes Receivable, Alternative Minimum Tax Credit Refund

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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 in Excess of 90 Days

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

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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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 other tax credits.

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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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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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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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Amount of unrecognized tax benefits.

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Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2019
Significant Accounting Policies [Line Items]
Reclassification of income tax effects				$ 0
Effective tax rate increase (decrease)	1.00%
Annual production tax credits	2.00%
Decrease in stock-based compensation tax benefit	1.00%
Amortization of TCJA regulatory liability	2.00%
Unrecognized tax benefits	$ 8
AMT credit refund recorded in anticipation of refund from U.S. Treasury	153
Unrecognized compensation cost	$ 91
Recognition period (in years)	1 year 10 months 17 days
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
Unbilled Revenues
Significant Accounting Policies [Line Items]
Specific review of probable future collections based on receivable balances in excess of 90 days	30 days
DTE Electric
Significant Accounting Policies [Line Items]
Effective tax rate increase (decrease)	(4.00%)
Annual production tax credits	1.00%
Amortization of TCJA regulatory liability	3.00%
Unrecognized tax benefits	$ 10
DTE Electric \| DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	8		$ 14
Allocated costs	$ 9	$ 13
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
Accumulated Other Comprehensive Income (Loss)
Significant Accounting Policies [Line Items]
Reclassification of income tax effects				(25)
Retained Earnings
Significant Accounting Policies [Line Items]
Reclassification of income tax effects				25
ASU No. 2018-02 \| Accumulated Other Comprehensive Income (Loss)
Significant Accounting Policies [Line Items]
Reclassification of income tax effects				(25)
ASU No. 2018-02 \| Retained Earnings
Significant Accounting Policies [Line Items]
Reclassification of income tax effects				$ 25