Did not make up missed fasts before arrival of following Ramadhaan due to negligence

What is the ruling regarding the one who did not make up the missed fasts of Ramadhaan until the arrival of the following Ramadhaan, whilst he did not have a[n Islaamically valid] reason? Is it sufficient for him to repent [to Allaah] in addition to making up [the missed fasts] or is he [also] required to make an expiation (kaffaarah)?

Intentionally broke fast and then had sexual intercourse

Regarding a man who intentionally broke his fast in Ramadhaan, then had sexual intercourse [with his wife]. Is he required to make up [the fast] in addition to making an expiation, or is he just required to make up [the fast] without making an expiation?