They have won 17 Serie A titles.
They have won it 17 times, and are on course to win their 18th in 2009/2010.
Inter Milan have won it 3 times in 1963, 1964 and in 2010.
Which Milan are you asking about?A.c. Milan have won it 7 times, and Inter Milan have won it 3 times.
All-time record: Matches: 171 | Inter wins: 61 | Milan wins: 58 | Draws: 52 | Inter goals: 247 | Milan goals: 234| A Cool Youtube Place to see videos of these (and other encounters, involving AC Milan), the link is listed below www.youtube.com/acmilangoals
Inter Milan have so far won 16 Seria A titles.
54
all
AC Milan have won the Champions League 3 times and been runners up 3 times. Prior to that they had won the European Cup 4 times, (which was in fact The same competition, but only open to the winners of each European countries domestic league and was played on a knock out basis.)
18
7
A.C Milan have a very big fan support, as it is a very old club, it split in 1910, and Inter Milan was created. A.C. Milan have won the champion league 7 times, while Real Madrid have won it 9 times. So they have a very good fan base world over.