Earnings Per Share

3 Months Ended

Mar. 31, 2011

Earnings Per Share

Earnings Per Share

15. Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	First Quarter
	2011		2010
	(restated)
	(in millions, except per share amounts)
Basic earnings per share:
Net income (loss)	$	140.6	$	333.5
Less: Distributed and undistributed income (loss) available to nonvested shareholders	0.1		0.7
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries	$	140.5	$	332.8
Basic shares	183.9		184.3
Basic earnings per share	$	0.76	$	1.81
Diluted earnings per share:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries	$	140.5	$	332.8
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries	—		—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries	$	140.5	$	332.8
Basic shares	183.9		184.3
Effect of dilutive securities:
Options and restricted stock awards	0.8		0.9
Equity units	2.4		5.4
Diluted shares	187.1		190.6
Diluted earnings per share	$	0.75	$	1.75
Potentially dilutive securities excluded from computation of earning per share because of antidilutive effect	4.9		2.2