Description of Business and Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares

The following table shows the calculation of diluted shares (in millions):

	Year Ended December 31,
	2014	2013	2012
Shares used in computation of basic earnings per share	462	457	453
Total dilutive effect of outstanding stock awards	—	8	—
Shares used in computation of diluted earnings per share	462	465	453