Billionaire Drahi Targets PT Portugal

Billionaire Patrick Drahi, a French-Israeli telecom mogul, is attempting to acquire PT Portugal, the largest phone company in Portugal. This acquisition would require PT Portugal to separate from the Brazilian Telecom company OY, which might agree to the split to fund its own acquisitions. Drahi's holding company already owns cable assets in Portugal, and according to the Bloomberg billionaires list, he is worth over 8 billion dollars.

What assets does Patrick Drahi's holding company already own in Portugal?

According to the Bloomberg billionaires list, what is Patrick Drahi's estimated worth?