($ in millions, except per share data)

Three months ended
June 30,

Six months ended
June 30,

2011

2010

2011

2010

Numerator:

Net (loss) income

$

(620

)

$

145

$

(101

)

$

265

Denominator:

Weighted average common shares outstanding

523.1

540.7

528.2

540.4

Effect of dilutive potential common shares:

Stock options

--

2.1

--

2.0

Restricted stock units (non-participating)

--

0.2

--

Weighted average common and dilutive potential common shares outstanding

523.1

543.0

528.2

542.4

Earnings per share - Basic

$

(1.19

)

$

0.27

$

(0.19

)

$

0.49

Earnings per share - Diluted

$

(1.19

)

$

0.27

$

(0.19

)

$

0.49