Earnings Per Share

6 Months Ended

Jun. 30, 2011

Earnings Per Share

Earnings Per Share

14. Earnings Per Share

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

		Second Quarter					Six Months
		2011			2010		2011		2010
		(in millions, except per share amounts)
Basic earnings per share:
Net income (loss)		$	(57.7	)	$	203.5	$	67.7	$	525.5
Less: Distributed and undistributed income (loss) available to nonvested shareholders			—			0.2		0.1		0.7
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries		$	(57.7	)	$	203.3	$	67.6	$	524.8
Basic shares			184.2			184.1		184.0		184.2
Basic earnings per share		$	(0.31	)	$	1.10	$	0.37	$	2.85
Diluted earnings per share:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries		$	(57.7	)	$	203.3	$	67.6	$	524.8
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		$	(57.7	)	$	203.3	$	67.6	$	524.8
Basic shares			184.2			184.1		184.0		184.2
Effect of dilutive securities:
	Options and restricted stock awards		—			0.8		0.9		0.9
	Equity units		—			3.9		2.5		4.7
Diluted shares			184.2			188.8		187.4	$	189.8
Diluted earnings per share		$	(0.31	)	$	1.08	$	0.36	$	2.77
Potentially dilutive securities excluded from computation of earnings per share because of antidilutive effect			9.6			2.7		2.9		2.4