World's best companies for leaders

The most successful businesses know that developing talent is their top priority. Fortune ranks the companies that do it best.

This technology giant has deep profiles on 60,000 employees in -- or who have the potential to be in -- leadership roles.

With a workforce of almost 400,000, that's a significant and impressive portion of the company's employee base, and it spans the globe.

Where the average company might offer several hundred employees an international opportunity for two or three years, IBM gives "mobility assignments" to thousands for three to six months.

"It's an investment," says Ted Hoff, vice president with the company's Center for Learning and Development. "We want all IBM leaders to have cross-geographic experience."
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