KEY POINTS
  • United Technologies Chairman and CEO Greg Hayes says the board decided to break up the company when it realized there was no need to subsidize its aerospace business.
  • He spoke a day after UTC announced plans to split into three, spinning off its Otis and Carrier businesses to shareholders. Shares fell 5.5 percent on the news.
  • The breakup will cost $2.5 billion to $3 billion and be completed within about two years.

United Technologies Chairman and CEO Gregory Hayes said Tuesday the decision to break up the conglomerate came when the board realized that the company's three businesses could survive on their own.

"There was no cross-subsidy required, and that was, I think, the magic moment when the board said that we don't really need to be together," Hayes said on CNBC's "Squawk on the Street." "The question is should we be together?"