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INCOME TAXES
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
INCOME TAXES
The effective tax rate for the three months ended March 31, 2022 and 2021 was 17.2% and 9.9%, respectively. Wesco’s effective tax rate typically differs from the federal statutory income tax rate due to the tax effect of intercompany financing, foreign tax rate differences, the U.S. taxes imposed on foreign income, nondeductible expenses and state income taxes. For the three months ended March 31, 2022 and 2021, the effective tax rate reflects discrete income tax benefits of $13.4 million and $8.3 million, respectively, resulting from reductions to the valuation allowance recorded against foreign tax credit carryforwards, as well as deductible stock-based compensation of $5.8 million and $1.1 million, respectively. These discrete income tax benefits reduced the estimated annual effective tax rate by approximately 8.7 and 14.4 percentage points, respectively.
There have been no material adjustments to liabilities for uncertain tax positions since the last annual disclosure for the year ended December 31, 2021.