Through the first eight games of the season, the Detroit Lions committed a league-low five turnovers.
They more than doubled that mark after Sunday's loss to the Bears.
The Bears generated six turnovers, the most since the club had seven on Sept. 17, 1995, in Tampa.
Just as important, safety Major Wright and cornerback Charles Tillman returned interceptions for touchdowns.
Asked if that was the most dominant performance of his tenure, Bears defensive end Israel Idonije said, "It really was.
"We imposed our will today - and it felt good."
Added linebacker Brian Urlacher, "I don't think we'll lose too many games playing like that on defense.
"That's as dominant as I've been around. They had yards - whatever. But we got takeaways when we needed to, and scored with them."
The Lions had 80 rushing yards, averaging 4.2 yards per carry, and Matthew Stafford had 329 passing yards. But he attempted 63 passes, and his rating was 46.3. He was sacked twice, and he was pressured four times, according to the final game stats.
"It was tough to throw the ball out there today," Stafford said, citing the wind. "We put ourselves in a tough spot. That's on us as a team. We didn't play well enough on any phase of the game to win the game.
"I've got to give a lot of credit to Chicago. They're a good football team."