Second Quarter

Six Months

2011

2010

2011

2010

(in millions, except per share amounts)

(restated)

Basic earnings per share:

Net income (loss)

$

(42.6

)

$

179.1

$

98.0

$

512.6

Less: Distributed and undistributed income (loss) available to nonvested shareholders

—

0.3

0.1

1.0

Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries

$

(42.6

)

$

178.8

$

97.9

$

511.6

Basic shares

184.2

184.1

184.0

184.2

Basic earnings per share

$

(0.23

)

$

0.97

$

0.53

$

2.78

Diluted earnings per share:

Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries

$

(42.6

)

$

178.8

$

97.9

$

511.6

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

$

(42.6

)

$

178.8

$

97.9

$

511.6

Basic shares

184.2

184.1

184.0

184.2

Effect of dilutive securities:

Options and restricted stock awards

—

0.8

0.9

Equity units

—

3.9

2.5

4.7

Diluted shares

184.2

188.8

187.4

$

189.8

Diluted earnings per share

$

(0.23

)

$

0.95

$

0.52

$

2.70

Potentially dilutive securities excluded from computation of earnings per share because of antidilutive effect

9.6

2.7

2.9

2.4