According to this article (and many others), Apple has a massive cash pile of 137 billion. However, if I look at their Financial Statements, it shows (as of 2012-12-29) they only have 40 billion in Cash and Short Term investments and 72 billion in Total Current Assets. How do people get the number of 137 billion?
JoeTaxpayer's comment basically answers my question. See this link for a more detailed explanation. The article Getting Apple's Cash Right And Why It's Important was published January 2012, but makes the issue clear.