Periods Ended June 30

Second Quarter

Six Months

2012

2011

2012

2011

(in millions, except for per share amounts)

Basic earnings per share:

Net income

$

404

$

419

$

910

$

928

Weighted average shares outstanding

271.5

293.6

272.9

296.0

Basic earnings per share

$

1.49

$

1.43

$

3.33

$

3.14

Diluted earnings per share:

Net income

$

404

$

419

$

910

$

928

Weighted average shares outstanding

271.5

293.6

272.9

296.0

Additional shares from assumed issuance of shares under stock- based compensation awards

1.8

1.9

1.7

Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share

273.3

295.4

274.8

297.7

Diluted earnings per share

$

1.48

$

1.42

$

3.31

$

3.12