Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Income and Comprehensive Income [Abstract]
Net Income	$ 327	$ 235
Other comprehensive income (loss), net of tax:
Benefit obligations, net of tax	0	3
Foreign currency translation, net of taxes of $(1) and $—	(1)	(1)
Other Comprehensive Income (Loss), Net of Tax	(1)	2
Comprehensive income	326	237
Less: Comprehensive income attributable to noncontrolling interests	1	1
Comprehensive income attributable to DTE Energy Company	$ 325	$ 236