The Division Champions are determined by the best Win-Loss record during regular season. If two clubs have identical regular season records, then the order of tiebreakers is as follows:
Two Club Tiebreakers
- Head-to-head (best won-lost-tied percentage in games between the clubs).
- Best won-lost-tied percentage in games played within the division.
- Best won-lost-tied percentage in common games.
- Best won-lost-tied percentage in games played within the conference.
- Strength of victory.
- Strength of schedule.
- Best combined ranking among conference teams in points scored and points allowed.
- Best combined ranking among all teams in points scored and points allowed.
- Best net points in common games.
- Best net points in all games.
- Best net touchdowns in all games.
- Coin toss
You may check: http://www.nfl.com/standings/tiebreakingprocedures
for complete details, including if 3 or more teams tie.