Earnings Per Share (Notes)

12 Months Ended

Dec. 31, 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 December 31:

	2012		2011		2010
	(In millions, expect per share amounts)
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	610	$	711	$	630
Average number of common shares outstanding	171		169		168
Weighted average net restricted shares outstanding	1		1		1
Dividends declared — common shares	$	413	$	392	$	365
Dividends declared — net restricted shares	1		1		2
Total distributed earnings	$	414	$	393	$	367
Net income less distributed earnings	$	196	$	318	$	263
Distributed (dividends per common share)	$	2.42	$	2.32	$	2.18
Undistributed	1.14		1.87		1.57
Total Basic Earnings per Common Share	$	3.56	$	4.19	$	3.75
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	610	$	711	$	630
Average number of common shares outstanding	171		169		168
Average incremental shares from assumed exercise of options	1		1		1
Common shares for dilutive calculation	172		170		169
Weighted average net restricted shares outstanding	1		1		1
Dividends declared — common shares	$	413	$	392	$	365
Dividends declared — net restricted shares	1		1		2
Total distributed earnings	$	414	$	393	$	367
Net income less distributed earnings	$	196	$	318	$	263
Distributed (dividends per common share)	$	2.42	$	2.32	$	2.18
Undistributed	1.13		1.86		1.56
Total Diluted Earnings per Common Share	$	3.55	$	4.18	$	3.74

Options to purchase approximately 5 million shares of common stock in 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.