Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

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

	2012		2011
	(In millions, expect per share amounts)
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	156	$	176
Average number of common shares outstanding	170		169
Weighted average net restricted shares outstanding	1		1
Dividends declared — common shares	$	100	$	94
Dividends declared — net restricted shares	—		1
Total distributed earnings	$	100	$	95
Net income less distributed earnings	$	56	$	81
Distributed (dividends per common share)	$	0.59	$	0.56
Undistributed	0.32		0.48
Total Basic Earnings per Common Share	$	0.91	$	1.04
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	156	$	176
Average number of common shares outstanding	170		169
Average incremental shares from assumed exercise of options	—		1
Common shares for dilutive calculation	170		170
Weighted average net restricted shares outstanding	1		1
Dividends declared — common shares	$	100	$	94
Dividends declared — net restricted shares	—		1
Total distributed earnings	$	100	$	95
Net income less distributed earnings	$	56	$	81
Distributed (dividends per common share)	$	0.59	$	0.56
Undistributed	0.32		0.48
Total Diluted Earnings per Common Share	$	0.91	$	1.04