0000929008 2020-05-29 2020-05-29 0000929008 false 8-K 2020-05-29 WESCO International, Inc. DE 001-14989 25-1723342 225 West Station Square DriveSuite 700 15219 Pittsburgh, PA 412 454-2200 Common Stock, par value $.01 per share WCC NYSE true false false false false 2020-05-29