Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

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

	Three Months Ended				Six Months Ended
	June 30				June 30
	2012		2011		2012		2011
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	146	$	202	$	302	$	378
Average number of common shares outstanding	170		169		170		169
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	100	$	99	$	200	$	194
Dividends declared — net restricted shares	1		—		1		—
Total distributed earnings	$	101	$	99	$	201	$	194
Net income less distributed earnings	$	45	$	103	$	101	$	184
Distributed (dividends per common share)	$	0.59	$	0.59	$	1.18	$	1.15
Undistributed	0.27		0.60		0.59		1.08
Total Basic Earnings per Common Share	$	0.86	$	1.19	$	1.77	$	2.23
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	146	$	202	$	302	$	378
Average number of common shares outstanding	170		170		170		170
Average incremental shares from assumed exercise of options	1		—		1		—
Common shares for dilutive calculation	171		170		171		170
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	100	$	99	$	200	$	194
Dividends declared — net restricted shares	1		—		1		—
Total distributed earnings	$	101	$	99	$	201	$	194
Net income less distributed earnings	$	45	$	103	$	101	$	184
Distributed (dividends per common share)	$	0.59	$	0.59	$	1.18	$	1.15
Undistributed	0.27		0.60		0.59		1.08
Total Diluted Earnings per Common Share	$	0.86	$	1.19	$	1.77	$	2.23