The Swedish Reformation took most of a century and was carried out by legislation rather than by rupture. The Diet of Vasteras in 1527 put church property at the disposal of the crown and left the preaching of the gospel to be conducted purely, which is broad enough to have been read several ways at the time. Gustav Vasa needed the revenue and the reformers needed the opening, and both got what they wanted without anyone being required to say precisely what had changed.
Olaus Petri, who had studied at Wittenberg, produced the Swedish New Testament of 1526 and a Swedish mass in 1531. His brother Laurentius Petri became the first Lutheran archbishop of Uppsala and served for nearly forty years, and his church order of 1571 is the document that made the new arrangement work in practice. The complete Swedish Bible of 1541, the Gustav Vasa Bible, did for Swedish roughly what Luther did for German.
The settlement was fixed at the Uppsala Assembly of 1593, which adopted the unaltered Augsburg Confession, accepted the three ancient creeds, and rejected the return to Catholic practice that the reign of John III had made a live possibility. That assembly is the point Swedish Lutherans date their confessional identity from, and it was as much a political act as a theological one, since the heir to the throne was a Catholic.