Earnings Per Share

9 Months Ended

Sep. 30, 2011

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.

	Three Months				Nine Months
	Ended September 30				Ended September 30
(in Millions, except per share amounts)	2011		2010		2011		2010
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	183	$	163	$	561	$	478
Average number of common shares outstanding	169		169		169		168
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	99	$	94	$	293	$	271
Dividends declared — net restricted shares	—		1		1		1
Total distributed earnings	$	99	$	95	$	294	$	272
Net income less distributed earnings	$	84	$	68	$	267	$	206
Distributed (dividends per common share)	0.59		0.56		$	1.74	$	1.62
Undistributed	0.49		0.41		1.57		1.23
Total Basic Earnings per Common Share	$	1.08	0.97		$	3.31	$	2.85
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	183	$	163	$	561	$	478
Average number of common shares outstanding	169		169		169		168
Average incremental shares from assumed exercise of options	1		1		1		—
Common shares for dilutive calculation	170		170		170		168
Weighted average net restricted shares outstanding	1		1		1		1
Dividends declared — common shares	$	99	$	94	$	293	$	271
Dividends declared — net restricted shares	—		1		1		1
Total distributed earnings	$	99	$	95	$	294	$	272
Net income less distributed earnings	$	84	$	68	$	267	$	206
Distributed (dividends per common share)	$	0.59	$	0.56	$	1.74	$	1.62
Undistributed	0.48		0.40		1.56		1.22
Total Diluted Earnings per Common Share	$	1.07	$	0.96	$	3.30	$	2.84

Options to purchase approximately 0.4 million shares of common stock as of September 30, 2010, were not included in the computation of diluted earnings per share because the options’ exercise price was greater than the average market price of the common shares, thus making these options anti-dilutive.