Earnings Per Share

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

The Company reports both basic and diluted earnings per share. The calculation of diluted earnings per share assumes the issuance of potentially dilutive common shares outstanding during the period from the exercise of stock options. A reconciliation of both calculations is presented in the following table as of September 30 (in millions, except per share amounts):

	Three Months Ended				Nine Months Ended
	September 30				September 30
	2012		2011		2012		2011
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	227	$	183	$	529	$	561
Average number of common shares outstanding	172		169		171		169
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	106	$	99	$	307	$	293
Dividends declared — net restricted shares	1		—		2		1
Total distributed earnings	$	107	$	99	$	309	$	294
Net income less distributed earnings	$	120	$	84	$	220	$	267
Distributed (dividends per common share)	$	0.62	$	0.59	$	1.80	$	1.74
Undistributed	0.70		0.49		1.29		1.57
Total Basic Earnings per Common Share	$	1.32	$	1.08	$	3.09	$	3.31
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	227	$	183	$	529	$	561
Average number of common shares outstanding	172		169		171		169
Average incremental shares from assumed exercise of options	—		1		—		1
Common shares for dilutive calculation	172		170		171		170
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	106	$	99	$	307	$	293
Dividends declared — net restricted shares	1		—		2		1
Total distributed earnings	$	107	$	99	$	309	$	294
Net income less distributed earnings	$	120	$	84	$	220	$	267
Distributed (dividends per common share)	$	0.62	$	0.59	$	1.80	$	1.74
Undistributed	0.69		0.48		1.28		1.56
Total Diluted Earnings per Common Share	$	1.31	$	1.07	$	3.08	$	3.30