v3.26.3
Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 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 and nine months ended September 30, 2026 and 2025:
Three months ended
Nine months ended
September 30,
September 30,
$ in millions
2026
2025
2026
2025
Service cost
$
0.5 
$
0.5 
$
1.5 
$
1.6 
Interest cost
3.2 
3.7 
9.5 
11.0 
Expected return on plan assets
(3.8)
(3.9)
(11.3)
(11.8)
Amortization of unrecognized:
Prior service cost
0.2 
0.2 
0.7 
0.7 
Actuarial loss
0.7 
0.8 
2.0 
2.4 
Net periodic benefit cost
$
0.8 
$
1.3 
$
2.4 
$
3.9