Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

A reconciliation of both calculations is presented in the following table for the three months and nine months ended September 30:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
	(In millions, except per share amounts)
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	198	$	227	$	537	$	529
Average number of common shares outstanding	175		172		174		171
Weighted average net restricted shares outstanding	—		1		1		1
Dividends declared — common shares	$	115	$	106	$	337	$	307
Dividends declared — net restricted shares	1		1		1		2
Total distributed earnings	$	116	$	107	$	338	$	309
Net income less distributed earnings	$	82	$	120	$	199	$	220
Distributed (dividends per common share)	$	0.66	$	0.62	$	1.93	$	1.80
Undistributed	0.47		0.70		1.14		1.29
Total Basic Earnings per Common Share	$	1.13	$	1.32	$	3.07	$	3.09
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	198	$	227	$	537	$	529
Average number of common shares outstanding	176		172		175		171
Average incremental shares from assumed exercise of options	—		—		—		—
Common shares for dilutive calculation	176		172		175		171
Weighted average net restricted shares outstanding	—		1		1		1
Dividends declared — common shares	$	115	$	106	$	337	$	307
Dividends declared — net restricted shares	1		1		1		2
Total distributed earnings	$	116	$	107	$	338	$	309
Net income less distributed earnings	$	82	$	120	$	199	$	220
Distributed (dividends per common share)	$	0.66	$	0.62	$	1.93	$	1.80
Undistributed	0.47		0.69		1.14		1.28
Total Diluted Earnings per Common Share	$	1.13	$	1.31	$	3.07	$	3.08