Stockholders' Equity Stockholders' Equity

9 Months Ended

Sep. 30, 2013

Stockholders' Equity Attributable to Parent [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Stockholders' Equity

In the third quarter of 2013, we acquired 14 million common shares at a cost of $500 million under our $5 billion authorized share repurchase program.