Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Schedule of Other Nonoperating Income, by Component

The following is a summary of DTE Energy's Other income:

	Three Months Ended March 31,
	2017		2016
	(In millions)
Equity earnings of equity method investees	$	26	$	15
Income from REF investees	18		19
Gains from trading securities	8		5
Allowance for equity funds used during construction	7		5
Contract services	4		6
Other	1		2
	$	64	$	52

The following is a summary of DTE Electric's Other income:

	Three Months Ended March 31,
	2017		2016
	(In millions)
Gains from trading securities allocated from DTE Energy	$	8	$	5
Allowance for equity funds used during construction	6		4
Contract services	4		6
Other	1		1
	$	19	$	16

Schedule of Effective Tax Rate and Unrecognized Tax Benefits

The effective tax rate and unrecognized tax benefits of the Registrants are as follows:

	Effective Tax Rate				Unrecognized Tax Benefits
	Three Months Ended March 31,				March 31,
	2017		2016		2017
					(In millions)
DTE Energy	22	%	26	%	$	10
DTE Electric	35	%	36	%	$	13