v3.26.1
Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2026
Entity Information [Line Items]  
Schedule of Net Periodic Benefit Cost / (Income)
The following table presents the net periodic benefit cost of the Pension Plans for the three months ended March 31, 2026 and 2025:
Three months ended
March 31,
$ in millions
2026
2025
Service cost
$
0.5 
$
0.6 
Interest cost
3.2 
3.6 
Expected return on plan assets
(3.8)
(3.9)
Amortization of unrecognized:
Prior service cost
0.2 
0.2 
Actuarial loss
0.7 
0.8 
Net periodic benefit cost
$
0.8 
$
1.3