Earnings Per Share (Tables)

6 Months Ended

Jun. 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 six months ended June 30:

	Three Months Ended					Six Months Ended
	June 30					June 30
	2013			2012		2013		2012
	(In millions, except per share amounts)
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	105		$	146	$	339	$	302
Average number of common shares outstanding	174			170		174		170
Weighted average net restricted shares outstanding	1			1		1		1
Dividends declared — common shares	$	114		$	100	$	222	$	200
Dividends declared — net restricted shares	1			1		—		1
Total distributed earnings	$	115		$	101	$	222	$	201
Net income less distributed earnings	$	(10	)	$	45	$	117	$	101
Distributed (dividends per common share)	$	0.66		$	0.59	$	1.28	$	1.18
Undistributed	(0.06		)	0.27		0.66		0.59
Total Basic Earnings per Common Share	$	0.60		$	0.86	$	1.94	$	1.77
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	105		$	146	$	339	$	302
Average number of common shares outstanding	175			170		174		170
Average incremental shares from assumed exercise of options	—			1		—		1
Common shares for dilutive calculation	175			171		174		171
Weighted average net restricted shares outstanding	1			1		1		1
Dividends declared — common shares	$	114		$	100	$	222	$	200
Dividends declared — net restricted shares	1			1		—		1
Total distributed earnings	$	115		$	101	$	222	$	201
Net income less distributed earnings	$	(10	)	$	45	$	117	$	101
Distributed (dividends per common share)	$	0.66		$	0.59	$	1.28	$	1.18
Undistributed	(0.06		)	0.27		0.66		0.59
Total Diluted Earnings per Common Share	$	0.60		$	0.86	$	1.94	$	1.77