Francoise Bettencourt Meyers, the reclusive 70-year-old vice-chair of the cosmetics titan L'Oreal, has become the first woman ever to amass a fortune of US$100b - but how much do we know about her?

The first woman to amass a fortune of $100bn is a reclusive intellectual who brought scandalous family secrets to the surface when she launched a court battle to protect her mother.