FAIRFIELD, Conn. ( TheStreet) -- General Electric ( GE) and Vivendi are at least $1 billion apart in their valuation of the French media company's stake in NBC Universal, a report says.

The differences between the companies are holding up Comcast's ( CMCSA) planned bid for a majority stake of 51% in NBC Universal, the Financial Times reports..

GE and cable company Comcast were looking to unveil an agreement before the Thanksgiving holiday in the U.S. next Thursday, the newspaper reports, citing people familiar with the negotiations.

Although GE and Comcast have been working towards an announcement on Monday, GE and Vivendi remain $1 billion to $2 billion apart on the valuation of Vivendi's 20% stake in NBC Universal, these people said.

On Thursday, it was reported that Vivendi's chief financial officer said his company wants to exit NBC Universal but a decision hasn't been made for this year.

Phillipe Capron called the situation "complex," Dow Jones Newswires reported.

-- Reported by Joseph Woelfel in New York .

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