Net Income Per Common Share Computations (Tables)

3 Months Ended

Mar. 31, 2012

Computations of Net Income Per Common Share

The computations of net income per common share are presented in the following table.

	Three Months Ended March 31,
($ In Millions Except Share Information)	2012		2011
Basic Net Income Per Common Share
Average Number of Common Shares Outstanding		241,090,093		242,126,162
Net Income	$	161.2	$	151.0
Net Income Applicable to Common Stock		161.2		151.0
Less: Earnings Allocated to Participating Securities		2.1		1.7
Earnings Allocated to Common Shares Outstanding	$	159.1	$	149.3
Basic Net Income Per Common Share		0.66		0.62
Diluted Net Income Per Common Share
Average Number of Common Shares Outstanding		241,090,093		242,126,162
Plus Dilutive Effect of Share-based Compensation		466,003		843,467
Average Common and Potential Common Shares		241,556,096		242,969,629
Earnings Allocated to Common and Potential Common Shares	$	160.0	$	149.3
Diluted Net Income Per Common Share		0.66		0.61

Note: Common stock equivalents totaling 15,013,663 and 8,922,540 for the three months ended March 31, 2012 and 2011, respectively, were not included in the computation of diluted net income per common share because their inclusion would have been antidilutive.