Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Income and Comprehensive Income [Abstract]
Net Income	$ 107	$ 147	$ 342	$ 305
Benefit obligations:
Benefit obligation, net of taxes of $1, $1, $2 and $3	2	3	5	6
Total Benefit obligations	2	3	5	6
Net unrealized gains (losses) on derivatives:
Gains during the period, net of taxes of $—, $—, $— and $—	0	0	0	1
Net unrealized gains (losses) on derivatives	0	0	0	1
Foreign currency translation, net of taxes of $(1), $-, $(1) and $-	(1)	(1)	(2)	0
Other Comprehensive income	1	2	3	7
Comprehensive income	108	149	345	312
Less: Comprehensive income attributable to noncontrolling interests	2	1	3	3
Comprehensive income attributable to DTE Energy Company	$ 106	$ 148	$ 342	$ 309