Stock-Based Compensation

6 Months Ended

Jun. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Stock-Based Compensation

The following table summarizes the Company's pre-tax compensation expense and related income tax benefit during thethreeandsixmonths endedJune 30, 2012 and 2011related to the Company's performance units and restricted stock.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In millions)	2012		2011		2012		2011
Performance units
Total shareholder return	$	2.0	$	1.9	$	3.8	$	3.7
Earnings per share	0.6		0.8		1.3		3.0
Total performance units	2.6		2.7		5.1		6.7
Restricted stock	0.2		0.2		0.4		0.5
Total compensation expense	$	2.8	$	2.9	$	5.5	$	7.2
Income tax benefit	$	1.1	$	1.1	$	2.2	$	2.8

During thethreeandsixmonths endedJune 30, 2012, there were4,113 shares and392,700shares, respectively, of newcommon stock issuedpursuant to the Company's stock incentive plans related to exercised stock options, restricted stock grants (net of forfeitures) and payouts of earned performance units. In November 2011, the Company purchased 120,000 shares of its common stock on the open market. During the threemonths endedMarch 31, 2012, 114,949 of these shares were used to payout Enogex's portion of earned performance units and during the threemonths endedJune 30, 2012, 2,419 of these shares (net of forfeitures) were used to satisfy restricted stock grants. During thethreeandsixmonths endedJune 30, 2012, there were2,587and2,932shares of restricted stock, respectively, returned to the Company to satisfy tax liabilities. The Company received $0.1 million during each of the threeandsixmonths endedJune 30, 2012 related to exercised stock options. The Company did not realize an income tax benefit for the tax deductions from the exercised stock options during the threeandsixmonths endedJune 30, 2012 due to the Company being in a tax net operating loss position in 2012.

The following table summarizes the activity of the Company's stock-based compensation during thethreemonths endedJune 30, 2012.

	Shares	Fair Value
Grants
Restricted stock	358	$51.73