Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2013

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 for the three months ended March 31:

	2013		2012
	(In millions, except per share amounts)
Basic Earnings per Share
Net income attributable to DTE Energy Company	$	234	$	156
Average number of common shares outstanding	173		170
Weighted average net restricted shares outstanding	1		1
Dividends declared — common shares	$	107	$	100
Dividends declared — net restricted shares	1		—
Total distributed earnings	$	108	$	100
Net income less distributed earnings	$	126	$	56
Distributed (dividends per common share)	$	0.62	$	0.59
Undistributed	0.73		0.32
Total Basic Earnings per Common Share	$	1.35	$	0.91
Diluted Earnings per Share
Net income attributable to DTE Energy Company	$	234	$	156
Average number of common shares outstanding	173		170
Average incremental shares from assumed exercise of options	—		—
Common shares for dilutive calculation	173		170
Weighted average net restricted shares outstanding	1		1
Dividends declared — common shares	$	107	$	100
Dividends declared — net restricted shares	1		—
Total distributed earnings	$	108	$	100
Net income less distributed earnings	$	126	$	56
Distributed (dividends per common share)	$	0.62	$	0.59
Undistributed	0.72		0.32
Total Diluted Earnings per Common Share	$	1.34	$	0.91