[part company] {v. phr.}
1. To part with someone; leave each other; separate.
* /The boys parted company as they came from the park./* /George parted company with the others at his front door./
2. To be different from someone in opinion or action; follow your own way; disagree; differ.
* /They parted company on where the new highway should be built./* /The mayor parted company with the newspapers on raising taxes./