Nippon Steel and U.S. Steel said Wednesday they have finalized their “historic partnership,” a deal that gives the U.S. government a say in some matters and comes a year-and-a-half after the Japanese company first proposed its nearly $15 billion buyout of the iconic American steelmaker.

The agreement calls for Nippon Steel to invest roughly $11 billion across U.S. Steel’s domestic operations over the next three years, a move the companies say will protect and create more than 100,000 jobs.