NEW YORK — Walt Disney Co. and 21st Century Fox struck a new deal Wednesday: Disney agreed to pay $71.3 billion for Fox entertainment assets, surpassing the $65-billion offer from Comcast Corp.

Disney said it amended its original Dec. 21 agreement with Fox in which Disney offered $52.8 billion.

Fox said the amended deal is “superior” to the offer made by Comcast. Its board accepted Disney’s offer, although the acceptance is subject to shareholder approval and does not rule out evaluating a competing bid.