Probably not, but he said this in a homily today:
The Lord has redeemed all of us, all of us, with the Blood of Christ: all of us, not just Catholics. Everyone! ‘Father, the atheists?’ Even the atheists. Everyone! And this Blood makes us children of God of the first class! We are created children in the likeness of God and the Blood of Christ has redeemed us all!
Still, though this is a sermon and not a theological treatise, the pope’s language here sounds awfully categorical. And his two predecessors were both fans of Hans Urs Von Balthasar, who argued that we should at least hope that everyone will be saved.