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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Significant Accounting Policies [Line Items]

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

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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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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

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		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates	11.00%	7.00%	11.00%	13.00%
Effective tax rate increase (decrease)	4.00%		(2.00%)
Annual production tax credits	7.00%		4.00%
Amortization of TCJA regulatory liability	3.00%		3.00%
Remeasurement of deferred taxes			$ 21
Measurement period impact to effective tax rate			3.00%
Unrecognized tax benefits	$ 8		$ 8
Unrecognized compensation cost	$ 104		$ 104
Recognition period (in years)			1 year 6 months 14 days
DTE Electric
Significant Accounting Policies [Line Items]
Estimated annual effective tax rates	16.00%	21.00%	16.00%	23.00%
Effective tax rate increase (decrease)	(5.00%)		(7.00%)
Annual production tax credits			1.00%
Amortization of TCJA regulatory liability			4.00%
Remeasurement of deferred taxes			$ 8
Measurement period impact to effective tax rate			2.00%
Unrecognized tax benefits	$ 10		$ 10
DTE Electric \| DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	9		9			$ 8
Allocated costs	$ 11	$ 8	$ 24	$ 17
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%