Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Income and Comprehensive Income [Abstract]
Net Income	$ 668	$ 618	$ 720
Other comprehensive income (loss), net of tax:
Benefit obligations, net of taxes of $13, $(1) and $(5)	22	(2)	(9)
Net unrealized gains on investments during the period, net of taxes of $1, $1 and $—	2	1	0
Foreign currency translation, net of taxes of $(1), $— and $—	(2)	1	0
Other Comprehensive Income (Loss), Net of Tax	22	0	(9)
Comprehensive income	690	618	711
Less: Comprehensive income attributable to noncontrolling interests	7	8	9
Comprehensive income attributable to DTE Energy Company	$ 683	$ 610	$ 702