Without the offending disk to examine, we may never know precisely what occurred. Fan disk or front bearing/shaft failure seems the most likely scenarios as a fan blade failure at cruise N1 generally does not lead to fan case separation.
To add for armchair speculators, there is low speed type damage and high speed type damage to look for.
One may be grossly greater in appearance but simply due to rundown after a highspeed event.
From a (un) containment threat standpoint I have yet to see any substantial damage to the underside of a wing. Thus this event while being costly may not have disabled any other critical systems and the aircraft was able to make a safe flight and landing as intended by design.