American billionaire and executive who owned media company Cox Enterprises.
She attended Finch College in New York in the 1940s.
Her total net worth was estimated to be more than $12 billion in 2010.
She had three children: Katherine, Margaretta, and James. She married second husband Robert W. Chambers in 1955. Her father was newspaper publisher and 1920 Democratic presidential nominee James M. Cox.
She was a key contributor to President Barack Obama 's 2008 election campaign.