Warren Buffett has frequently touted his Berkshire Hathaway as a home for businesses away from what he said was the debt-fueled, quick-turnover appetite of private equity firms. But the Berkshire name wasn't enough for Tech Data Corp.

Comcast on Wednesday offered $65 billion for key film and television assets of Rupert Murdoch's 21st Century Fox, topping an offer from Walt Disney Co. for a deal that could create a dominant media-entertainment power.