Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

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:

	2015			2014			2013
DTE Energy	(In millions)
Income Before Income Taxes	$	950		$	1,275		$	922
Income tax expense at 35% statutory rate	$	333		$	446		$	323
Production tax credits	(122		)	(119		)	(68		)
Investment tax credits	(7		)	(6		)	(6		)
Depreciation	(4		)	(4		)	(4		)
AFUDC - Equity	(8		)	(7		)	(5		)
Employee Stock Ownership Plan dividends	(5		)	(4		)	(4		)
Domestic production activities deduction	—			—			(14		)
State and local income taxes, net of federal benefit	35			51			37
Enactment of New York Corporate Income Tax Legislation, net of federal benefit	—			8			—
Other, net	8			(1		)	(5		)
Income Tax Expense	$	230		$	364		$	254
Effective income tax rate	24.2		%	28.5		%	27.5		%

	2015			2014			2013
DTE Electric	(In millions)
Income Before Income Taxes	$	836		$	830		$	741
Income tax expense at 35% statutory rate	$	293		$	291		$	260
Production tax credits	(31		)	(22		)	(15		)
Investment tax credits	(5		)	(5		)	(5		)
Depreciation	3			3			3
AFUDC - Equity	(7		)	(7		)	(5		)
Employee Stock Ownership Plan dividends	(3		)	(3		)	(2		)
Domestic production activities deduction	—			(2		)	(18		)
State and local income taxes, net of federal benefit	43			43			41
Other, net	(1		)	—			(5		)
Income Tax Expense	$	292		$	298		$	254
Effective income tax rate	34.9		%	35.9		%	34.3		%

Schedule of Components of Income Tax Expense (Benefit)

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

	2015			2014			2013
DTE Energy	(In millions)
Current income tax expense (benefit)
Federal	$	(3	)	$	(16	)	$	74
State and other income tax	(4		)	24			16
Total current income taxes	(7		)	8			90
Deferred income tax expense
Federal	178			289			122
State and other income tax	59			67			42
Total deferred income taxes	237			356			164
Total	$	230		$	364		$	254

	2015			2014			2013
DTE Electric	(In millions)
Current income tax expense (benefit)
Federal	$	(26	)	$	(19	)	$	123
State and other income tax	(2		)	20			23
Total current income taxes	(28		)	1			146
Deferred income tax expense
Federal	252			251			68
State and other income tax	68			46			40
Total deferred income taxes	320			297			108
Total	$	292		$	298		$	254

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
	2015			2014			2015			2014
	(In millions)
Property, plant, and equipment	$	(4,211	)	$	(3,832	)	$	(3,468	)	$	(3,152	)
Securitized regulatory assets	5			(2		)	5			(3		)
Tax credit carry-forwards	465			296			53			—
Pension and benefits	(301		)	(152		)	(193		)	(43		)
Federal net operating loss carry-forward	177			—			142			—
State and local net operating loss carry-forwards	63			39			16			—
Investments in equity method investees	(82		)	(84		)	—			—
Other	(4		)	65			(53		)	12
	(3,888		)	(3,670		)	(3,498		)	(3,186		)
Less valuation allowance	(35		)	(31		)	—			—
Long-term deferred income tax liabilities	$	(3,923	)	$	(3,701	)	$	(3,498	)	$	(3,186	)
Deferred income tax assets	$	1,088		$	861		$	453		$	357
Deferred income tax liabilities	(5,011		)	(4,562		)	(3,951		)	(3,543		)
	$	(3,923	)	$	(3,701	)	$	(3,498	)	$	(3,186	)

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:

	2015			2014			2013
DTE Energy	(In millions)
Balance at January 1	$	9		$	10		$	11
Lapse of statute of limitations	(6		)	(1		)	(1		)
Balance at December 31	$	3		$	9		$	10

	2015		2014		2013
DTE Electric	(In millions)
Balance at January 1	$	4	$	4	$	4
Balance at December 31	$	4	$	4	$	4