Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Reconciliation of Basic Shares to Diluted Shares

The following is a reconciliation of basic shares to diluted shares.

years ended December 31 (in millions)	2012		2011		2010
Basic shares		551		569		590
Effect of dilutive securities		5		4		4
Diluted shares		556		573		594