0000929008 2020-05-26 2020-05-26 false 0000929008 8-K 2020-05-26 WESCO International, Inc. DE 001-14989 25-1723342 225 West Station Square Drive Suite 700 15219 Pittsburgh PA 412 454-2200 Common Stock, par value $0.01 per share WCC NYSE true false false false false