Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share (Tables) [Abstract]

Basic and diluted earnings per share

	Three Months					Six Months
	Ended June 30					Ended June 30
(in Millions, except per share amounts)	2011		2010			2011		2010
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	202	$	86		$	378	$	315
Average number of common shares outstanding		169		169			169		167
Weighted average net restricted shares outstanding		1		1			1		1
Dividends declared — common shares	$	99	$	89		$	194	$	177
Dividends declared — net restricted shares		—		—			—		1
Total distributed earnings	$	99	$	89		$	194	$	178
Net income less distributed earnings	$	103	$	(3	)	$	184	$	137
Distributed (dividends per common share)	$	.59	$	.53		$	1.15	$	1.06
Undistributed		.60		(.02	)		1.08		.82
Total Basic Earnings per Common Share	$	1.19	$	.51		$	2.23	$	1.88
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	202	$	86		$	378	$	315
Average number of common shares outstanding		170		169			170		167
Average incremental shares from assumed exercise of options		—		—			—		1
Common shares for dilutive calculation		170		169			170		168
Weighted average net restricted shares outstanding		1		1			1		1
Dividends declared — common shares	$	99	$	89		$	194	$	177
Dividends declared — net restricted shares		—		—			—		1
Total distributed earnings	$	99	$	89		$	194	$	178
Net income less distributed earnings	$	103	$	(3	)	$	184	$	137
Distributed (dividends per common share)	$	.59	$	.53		$	1.15	$	1.06
Undistributed		.60		(.02	)		1.08		.82
Total Diluted Earnings per Common Share	$	1.19	$	.51		$	2.23	$	1.88