v3.25.2
STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
During the three and six months ended June 30, 2025 and 2024, Wesco granted the following stock options, restricted stock units, and performance-based awards at the following weighted-average fair values:
Three Months EndedSix Months Ended
June 30,
2025
June 30,
2024
June 30,
2025
June 30,
2024
Stock options granted4,745 — 89,221 85,425 
Weighted-average fair value$79.03 n/a$76.72 $72.05 
Restricted stock units granted7,144 35,992 222,747 238,291 
Weighted-average fair value$164.30 $184.73 $179.33 $157.19 
Performance-based awards granted
4,562 570 76,864 193,565 
Weighted-average fair value
$194.03 $147.40 $191.86 $108.83 
Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]
The following table sets forth a summary of stock-settled stock appreciation rights and related information for the six months ended June 30, 2025:
AwardsWeighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual Term (In years)
Aggregate
Intrinsic
Value
(In millions)
Outstanding at December 31, 2024
699,044 $58.90   
     Granted— —   
     Exercised(27,781)50.82  
     Forfeited— —   
Outstanding at June 30, 2025
671,263 $59.24 3.8$84.6 
Exercisable at June 30, 2025
671,263 $59.24 3.8$84.6 
For the six months ended June 30, 2025, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $3.6 million.
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
The following table sets forth a summary of restricted stock units and related information for the six months ended June 30, 2025:
AwardsWeighted-
Average
Fair
Value
Unvested at December 31, 2024
427,570 $149.84 
     Granted222,747 179.33 
     Vested(167,298)146.16 
     Forfeited(31,702)177.50 
Unvested at June 30, 2025
451,317 $163.67 
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
The following table sets forth a summary of performance-based awards and related information for the six months ended June 30, 2025:
AwardsWeighted-
Average
Fair
Value
Unvested at December 31, 2024
214,517 $147.19 
     Granted
76,864 191.86 
     Vested(75,189)122.09 
     Forfeited(16,436)171.51 
Unvested at June 30, 2025
199,756 $171.83 
Share-Based Payment Arrangement, Option, Activity
The following table sets forth a summary of stock options and related information for the six months ended June 30, 2025:
AwardsWeighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual Term (In years)
Aggregate
Intrinsic
Value
(In millions)
Outstanding at December 31, 2024
234,814 $147.08   
     Granted89,221 180.72   
     Exercised(2,139)140.90  
     Forfeited(12,488)169.83   
Outstanding at June 30, 2025
309,408 $155.90 8.0$9.1 
Exercisable at June 30, 2025
153,368 $141.94 6.8$6.6 
For the six months ended June 30, 2025, the aggregate intrinsic value of stock options exercised during such period was not material.
Stock Appreciation Rights (SARs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair values of stock options, as disclosed in the table above, were estimated using the following weighted-average assumptions in the respective periods:
Three Months EndedSix Months Ended
June 30,
2025
June 30,
2024
June 30,
2025
June 30,
2024
Risk free interest rate4.0%n/a4.1%4.2%
Expected life (in years)5n/a55
Expected volatility47%n/a47%55%
Expected dividend yield0.98%n/a1.01%1.09 %