v3.26.3
Retirement benefits (Tables)
 9 Months Ended
Sep. 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 September 30,
Service cost$— — 2.4 2.2 2.4 2.2 
Interest cost on projected benefit obligation7.5 7.8 5.1 4.6 12.6 12.4 
Return on assets – expected(9.4)(11.1)(2.9)(3.0)(12.3)(14.1)
Amortization of losses2.5 1.2 1.0 0.8 3.5 2.0 
Amortization of prior service credit— — — 0.1 — 0.1 
Settlement loss— — — 0.3 — 0.3 
Net periodic pension cost (credit)
$0.6 (2.1)5.6 5.0 6.2 2.9 
Nine months ended September 30,
Service cost$— — 7.1 6.3 7.1 6.3 
Interest cost on projected benefit obligation22.4 23.5 15.3 13.3 37.7 36.8 
Return on assets – expected(28.2)(33.4)(8.8)(8.6)(37.0)(42.0)
Amortization of losses7.5 3.9 2.9 2.1 10.4 6.0 
Amortization of prior service cost— — — 0.2 — 0.2 
Settlement loss— — — 1.0 — 1.0 
Net periodic pension cost (credit)
$1.7 (6.0)16.5 14.3 18.2 8.3 
Schedule of Costs of Retirement Plans
The components of net periodic postretirement cost (credit) related to retirement benefits other than pensions were as follows:
UMWA PlansBlack Lung and Other PlansTotal
(In millions)202620252026202520262025
Three months ended September 30,
Service cost$— — 0.1 — 0.1 — 
Interest cost on accumulated postretirement benefit obligations2.1 2.4 1.0 1.1 3.1 3.5 
Return on assets – expected(2.4)(2.3)— — (2.4)(2.3)
Amortization of losses0.1 0.5 0.8 0.8 0.9 1.3 
Amortization of prior service cost (credit)
(1.4)(2.5)(0.1)(0.1)(1.5)(2.6)
Net periodic postretirement cost (credit)
$(1.6)(1.9)1.8 1.8 0.2 (0.1)
Nine months ended September 30,
Service cost$— — 0.2 0.1 0.2 0.1 
Interest cost on accumulated postretirement benefit obligations6.6 7.2 3.0 3.3 9.6 10.5 
Return on assets – expected(7.3)(7.2)— — (7.3)(7.2)
Amortization of losses0.8 1.4 2.2 2.4 3.0 3.8 
Amortization of prior service cost (credit)
(4.2)(7.6)— — (4.2)(7.6)
Net periodic postretirement cost (credit)
$(4.1)(6.2)5.4 5.8 1.3 (0.4)