I understand the basics of the Shiller PE but what effect does the fact that so many companies are keeping their earnings overseas in Ireland, etc. have on this

I understand the basics of the Shiller PE but what effect does the fact that so many companies are keeping their earnings overseas in Ireland, etc. have on this? This article says that the top 50 companies have $1.4TT overseas right now. [http://money.cnn.com/2016/04/14/news/tax-us-companies-offshore-cash/ http://money.cnn.com/2016/04/14/news/tax-us-companies-offsho...]