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

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- Definition

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

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Significant Accounting Policies [Line Items]

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- Definition

Tax Cuts And Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)

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Tax Cuts And Jobs Act, Measurement Period Adjustment, Increase (Decrease) In Effective Tax Rate

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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

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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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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Amount of unrecognized tax benefits.

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Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates	12.00%	16.00%
Effective tax rate increase (decrease)	(4.00%)
Amortization of TCJA regulatory liability	3.00%
Remeasurement of deferred taxes	$ 21
Measurement period impact to effective tax rate	5.00%
Annual production tax credits	5.00%
Unrecognized tax benefits	$ 8
Unrecognized compensation cost	$ 121
Recognition period (in years)	1 year 9 months 7 days
DTE Electric
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates	16.00%	25.00%
Effective tax rate increase (decrease)	(9.00%)
Amortization of TCJA regulatory liability	4.00%
Remeasurement of deferred taxes	$ 8
Measurement period impact to effective tax rate	4.00%
Annual production tax credits	1.00%
Unrecognized tax benefits	$ 10
DTE Electric \| DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	3			$ 8
Allocated costs	$ 13	$ 9
Forecast
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates			12.00%
Forecast \| DTE Electric
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates			16.00%