GettyWal-Mart has a long history of stealing ideas from competitors.
In a recent interview, Wal-Mart Stores CEO Doug McMillon said the tradition is part of the retailer's "DNA."
"I mean going all the way back to [Wal-Mart founder] Sam Walton, we had a part of our DNA that was interested in learning from others," McMillon told PBS' Charlie Rose. "Copying good ideas. Don't be so proud that you can't implement a good idea."
According to Sam Walton's book "Made in America," Wal-Mart was built almost entirely off of other retailers' good ideas.
"Most everything I've done I've copied from someone else," Walton writes in the book.
One of Walton's first jobs in
While he was running the Ben Franklin store, Walton often visited his competition across the street.
"What really drove Sam was that competition across the street - John Dunham over at the Sterling Store," Walton's wife, Helen Walton, recalled in the book. "Sam was always over there checking on John. Always. Looking at his prices, looking at his displays, looking at what was going on."
Later on, when Walton built the first predecessor to Wal-Mart in Bentonville, Ark., he copied everything from Ben Franklin - from the accounting system to shelving.
"Although we called it Walton's Five and Dime, it was a Ben Franklin's franchise," Walton writes.
Walton says he was obsessive about staying on top of every new idea in retail.
"I read an article about these two Ben Franklin stores up in Minnesota that had gone to self-service - a brand-new concept at the time," Walton writes. "I rode the bus all night long to two little towns up there - Pipestone and Worthington. They had shelves on the side and two island counters all the way back. No clerks with cash registers around the store. Just checkout registers up front. I liked it. So I did that too."
One of the main competitors that Wal-Mart is studying right now is Amazon.
"We believe in learning from other people," McMillon said in the PBS interview. And what Amazon's doing and what [Amazon founder Jeff Bezos is] doing is showing us and showing the world what's possible and I admire that," McMillon said.
When asked what he admires about Amazon's business, McMillon said, "Very customer focused. Moving with speed. Just putting ideas at work that are directly beneficial to customers."
Watch the full interview.