"In order to preserve the Church in the purity of the faith handed on by the apostles, Christ who is Truth willed to confer on her a share in his own infallibility. By a supernatural sense of faith the People of God, under the guidance of the Church's living magisterium, unfailingly adheres to this faith." Catechism, p. 235, #889
"The Roman Pontiff... enjoys this infallibility in virtue of his office, when, as supreme pastor and teacher of all the faithful - who confirms his brethren in the faith - he proclaims by a definitive act a doctrine pertaining to faith or morals... This infallibility extends as far as the deposit of divine Revelation itself." Catechism, pg. 235, #891
"The Supreme Pontiff, in virtue of his office, possesses infallible teaching authority when ... he proclaims with a definitive act that a doctrine of faith or morals is to be held as such." Code of Canon Law, Can. 747
Just some quotes regarding Papal Infallibility to help us know what to look for in these documents to determine where they teach Infallibly.