v3.26.1
Retirement benefits (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of net periodic pension cost (credit) for our pension plans were as follows:
U.S. PlansNon-U.S. PlansTotal
(In millions)202620252026202520262025
Three months ended June 30,
Service cost$— — 2.3 2.1 2.3 2.1 
Interest cost on projected benefit obligation7.5 7.8 5.2 4.5 12.7 12.3 
Return on assets – expected(9.4)(11.2)(2.9)(2.9)(12.3)(14.1)
Amortization of losses2.6 1.4 0.9 0.7 3.5 2.1 
Settlement loss— — — 0.4 — 0.4 
Net periodic pension cost (credit)
$0.7 (2.0)5.5 4.8 6.2 2.8 
Six months ended June 30,
Service cost$— — 4.7 4.1 4.7 4.1 
Interest cost on projected benefit obligation14.9 15.7 10.2 8.7 25.1 24.4 
Return on assets – expected(18.8)(22.3)(5.9)(5.6)(24.7)(27.9)
Amortization of losses5.0 2.7 1.9 1.3 6.9 4.0 
Amortization of prior service cost— — — 0.1 — 0.1 
Settlement loss— — — 0.7 — 0.7 
Net periodic pension cost (credit)
$1.1 (3.9)10.9 9.3 12.0 5.4 
Schedule of Costs of Retirement Plans
The components of net periodic postretirement cost (credit) related to retirement benefits other than pensions were as follows:
UMWA PlansBlack Lung and Other PlansTotal
(In millions)202620252026202520262025
Three months ended June 30,
Service cost$— — — 0.1 — 0.1 
Interest cost on accumulated postretirement benefit obligations2.1 2.5 1.0 1.1 3.1 3.6 
Return on assets – expected(2.5)(2.5)— — (2.5)(2.5)
Amortization of losses0.2 0.6 0.7 0.8 0.9 1.4 
Amortization of prior service cost (credit)
(1.4)(2.5)0.1 — (1.3)(2.5)
Net periodic postretirement cost (credit)
$(1.6)(1.9)1.8 2.0 0.2 0.1 
Six months ended June 30,
Service cost$— — 0.1 0.1 0.1 0.1 
Interest cost on accumulated postretirement benefit obligations4.5 4.8 2.0 2.2 6.5 7.0 
Return on assets – expected(4.9)(4.9)— — (4.9)(4.9)
Amortization of losses0.7 0.9 1.4 1.7 2.1 2.6 
Amortization of prior service cost (credit)
(2.8)(5.1)0.1 — (2.7)(5.1)
Net periodic postretirement cost (credit)
$(2.5)(4.3)3.6 4.0 1.1 (0.3)