Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The Registrants' total Income Tax Expense varied from the statutory federal income tax rate for the following reasons:

	2018			2017			2016
DTE Energy	(In millions)
Income Before Income Taxes	$	1,216		$	1,287		$	1,105
Income tax expense at statutory rate - 21% in 2018 - 35% in 2017 and 2016	$	255		$	450		$	387
Production tax credits	(223		)	(189		)	(145		)
Investment tax credits	(4		)	(4		)	(5		)
Depreciation	2			(4		)	(4		)
Noncontrolling interests	2			8			12
AFUDC equity	(14		)	(18		)	(10		)
Employee Stock Ownership Plan dividends	(3		)	(5		)	(5		)
Stock based compensation	(3		)	(14		)	—
Subsidiary stock loss	—			—			(10		)
State and local income taxes, net of federal benefit	60			51			58
Enactment of the Tax Cuts and Jobs Act	21			(105		)	—
Other, net	5			5			(7		)
Income Tax Expense	$	98		$	175		$	271
Effective income tax rate	8.1		%	13.6		%	24.5		%

	2018			2017			2016
DTE Electric	(In millions)
Income Before Income Taxes	$	857		$	928		$	975
Income tax expense at statutory rate - 21% in 2018 - 35% in 2017 and 2016	$	180		$	325		$	341
Production tax credits	(35		)	(36		)	(30		)
Investment tax credits	(3		)	(4		)	(4		)
Depreciation	2			3			3
AFUDC equity	(3		)	(5		)	(6		)
Employee Stock Ownership Plan dividends	(2		)	(3		)	(3		)
State and local income taxes, net of federal benefit	49			48			56
Enactment of the Tax Cuts and Jobs Act	7			—			—
Other, net	(2		)	(1		)	(4		)
Income Tax Expense	$	193		$	327		$	353
Effective income tax rate	22.5		%	35.2		%	36.2		%

Schedule of Components of Income Tax Expense (Benefit)

Components of the Registrants' Income Tax Expense were as follows:

	2018			2017			2016
DTE Energy	(In millions)
Current income tax expense (benefit)
Federal	$	(17	)	$	(22	)	$	(1	)
State and other income tax	1			1			7
Total current income taxes	(16		)	(21		)	6
Deferred income tax expense
Federal	38			118			184
State and other income tax	76			78			81
Total deferred income taxes	114			196			265
	$	98		$	175		$	271

	2018		2017			2016
DTE Electric	(In millions)
Current income tax expense (benefit)
Federal	$	—	$	(17	)	$	—
State and other income tax	4		(1		)	11
Total current income taxes	4		(18		)	11
Deferred income tax expense
Federal	131		270			268
State and other income tax	58		75			74
Total deferred income taxes	189		345			342
	$	193	$	327		$	353

Schedule of Deferred Tax Assets and Liabilities

The Registrants' deferred tax assets (liabilities) were comprised of the following at December 31:

	DTE Energy						DTE Electric
	2018			2017			2018			2017
	(In millions)
Property, plant, and equipment	$	(3,462	)	$	(3,276	)	$	(2,840	)	$	(2,698	)
Regulatory assets and liabilities	(54		)	(94		)	(3		)	(31		)
Tax credit carry-forwards	1,178			947			250			193
Pension and benefits	311			334			258			302
Federal net operating loss carry-forward	117			83			2			47
State and local net operating loss carry-forwards	59			70			1			5
Investments in equity method investees	(216		)	(82		)	(1		)	—
Other	125			170			87			94
	(1,942		)	(1,848		)	(2,246		)	(2,088		)
Less valuation allowance	(33		)	(40		)	—			—
Long-term deferred income tax liabilities	$	(1,975	)	$	(1,888	)	$	(2,246	)	$	(2,088	)
Deferred income tax assets	$	2,021		$	1,814		$	855		$	830
Deferred income tax liabilities	(3,996		)	(3,702		)	(3,101		)	(2,918		)
	$	(1,975	)	$	(1,888	)	$	(2,246	)	$	(2,088	)

Schedule of Unrecognized Tax Benefits Roll Forward

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the Registrants is as follows:

	2018		2017		2016
DTE Energy	(In millions)
Balance at January 1	$	10	$	10	$	3
Additions for tax positions of prior years	—		—		7
Balance at December 31	$	10	$	10	$	10

	2018		2017		2016
DTE Electric	(In millions)
Balance at January 1	$	13	$	13	$	4
Additions for tax positions of prior years	—		—		9
Balance at December 31	$	13	$	13	$	13