That would depend upon what you would consider to be the spectrum of things that encompasses Christian teaching. There hasn't been a single complete unified doctrine that all Christians adhered to ever. Every early Christian community had its own set of scriptures. In the early days there were various sects including the Marconians, the gnostics, Jewish Christians, Pauline Christians, The Armenian Apastolic Church etc. Then there was the major split between Catholicism and Eastern Orthodox. Then came the protestant reformation in which Lutherans, Calvinists, and Anglican groups formed. These further fragmented and now we have Adventists, Baptists, Methodists, Church of England, Episcopalians, Pentecostalism, etc.

Every single group has its own idea of what constitutes "major Christian teaching." For example one of the hugest differences between Catholicism and most Protestant groups is that Catholicism holds sacred scripture and apostolic tradition in equal weight whereas most protestant groups view only sacred scripture as having the final authority in all matters.