Amazon.com Inc told Whole Foods Market Inc (WFM.O) it would not engage in a sale process for the U.S. grocer that involved other bidders, a regulatory filing showed on Friday, shedding new light on the $13.7 billion acquisition.

The previously undisclosed details on the negotiations show how Amazon used its deep pockets and brand as leverage to convince Whole Foods to accept a sale process that would not result in a bidding war.

Very smart move on Amazon’s part—look for other bids and we’re out. It doesn’t sound like the other people would have offered more than Amazon anyway.