COMMITMENTS AND CONTINGENCIES	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	From time to time, a number of lawsuits and claims have been or may be asserted against the Company relating to the conduct of its business, including litigation relating to commercial, product and employment matters. The outcome of any litigation cannot be predicted with certainty, and some lawsuits may result in a negative impact to Wesco. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on Wesco’s financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on Wesco’s results of operations for that period. Recoveries related to previously recognized losses are recorded when realization is probable. Recoveries in excess of recognized losses are deferred until realized or realizable. As of June 30, 2026, the Company has a loss contingency of approximately $49.0 million related to a matter in Other current liabilities, along with a corresponding insurance recovery receivable of $48.5 million in Other accounts receivable on the unaudited Condensed Consolidated Balance Sheet. As a result, the Company does not expect to incur a loss other than for the insurance deductible amount, which is not material to the unaudited Condensed Consolidated Financial Statements. On February 20, 2026, the U.S. Supreme Court ruled that tariffs previously imposed under the International Emergency Economic Powers Act (“IEEPA”) were invalid. The availability, timing, amount, and process for recovering IEEPA tariffs previously paid by the Company remains subject to further developments. IEEPA tariff refunds are not expected to materially impact the unaudited Condensed Consolidated Financial Statements for the Company. The Company continues to monitor developments and evaluate potential impacts on its financial condition and results of operations.

COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

From time to time, a number of lawsuits and claims have been or may be asserted against the Company relating to the conduct of its business, including litigation relating to commercial, product and employment matters. The outcome of any litigation cannot be predicted with certainty, and some lawsuits may result in a negative impact to Wesco. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on Wesco’s financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on Wesco’s results of operations for that period. Recoveries related to previously recognized losses are recorded when realization is probable. Recoveries in excess of recognized losses are deferred until realized or realizable.

As of June 30, 2026, the Company has a loss contingency of approximately $49.0 million related to a matter in Other current liabilities, along with a corresponding insurance recovery receivable of $48.5 million in Other accounts receivable on the unaudited Condensed Consolidated Balance Sheet. As a result, the Company does not expect to incur a loss other than for the insurance deductible amount, which is not material to the unaudited Condensed Consolidated Financial Statements.

On February 20, 2026, the U.S. Supreme Court ruled that tariffs previously imposed under the International Emergency Economic Powers Act (“IEEPA”) were invalid. The availability, timing, amount, and process for recovering IEEPA tariffs previously paid by the Company remains subject to further developments. IEEPA tariff refunds are not expected to materially impact the unaudited Condensed Consolidated Financial Statements for the Company. The Company continues to monitor developments and evaluate potential impacts on its financial condition and results of operations.