ALLEN PARK >> The Detroit Lions had hoped to conduct two sets of joint practices this offseason, but as soon as the preseason schedule came out, it became clear it wasn’t going to happen.

After getting a requested date with the New York Giants to open the exhibition slate, the Lions drew the defending-champion Kansas City Chiefs the second week of the preseason. And while most of the league has embraced joint practices as a developmental and evaluation tool, Chiefs coach Andy Reid has never been a fan.

“Had a lot of opportunities to do it, but probably from a selfish standpoint, in today’s world, with technology, there’s not a lot of secrets,” Reid explained in 2015. “You have your coaching points, teaching points you try to teach on the field and I really don’t want anyone hearing that. That’s my own personal feeling. As much as I can keep in-house in today’s world, I want to do.”

Who can argue? Reid has been the NFL’s most successful coach over the past decade, leading the Chiefs to nine straight playoff appearances, eight consecutive division titles and three Super Bowl championships, including the past two.

Despite Reid’s reluctance to take part in joint practices in the past, Lions coach Dan Campbell made the call to gauge interest, just in case, but the offer was declined.

“It didn’t work out,” Campbell said. “I talked to coach Reid a while back. That’s just not necessarily something that they do, and that’s all good.”

For Campbell, joint practices are valuable because they rachet up the intensity and competitiveness when teams can use the jolt, breaking up the monotony of going against your own teammates for nearly a month straight. It also lets teams simulate specific scenarios and situations against an opponent, reducing the need to get key players preseason snaps.

Campbell is still sorting out whether the Chiefs’ reluctance to practice together will alter preseason plans for playing his starters.

“Yeah, I’m still tinkering with that a little bit,” Campbell said. “Certainly, we’ll get our work done here however we need to do that, whether we are playing in the preseason or we’re getting it done here together during that week with the starters and the guys we’re going to count on. We’ll have a good plan. We’ll have them ready to go.”

The Lions are still a couple of weeks from their summer break before reconvening for training camp in late July. The team will travel to work with the Giants to begin the second week of August, culminating with an Aug. 8 preseason matchup at MetLife Stadium.