CCC 1005 To rise with Christ, we must die with Christ: we must “be away from the body and at home with the Lord.”1 In that “departure” which is death the soul is separated from the body.2 It will be reunited with the body on the day of resurrection of the dead.3
1 2 Cor 5:8.
2 Cf. Phil 1:23.
3 Cf. Paul VI, CPG § 28.