Retirement benefits (Tables)

9 Months Ended

Sep. 30, 2021

The components of net periodic pension cost for our pension plans were as follows:


	U.S. Plans			Non-U.S. Plans		Total
(In millions)	2021		2020	2021	2020	2021	2020

Three months ended September 30,

Service cost	$	—	—	2.1	1.8	2.1	1.8
Interest cost on projected benefit obligation	5.3		6.7	3.0	3.1	8.3	9.8
Return on assets – expected	(11.8)		(11.6)	(3.1)	(3.1)	(14.9)	(14.7)
Amortization of losses	8.4		7.3	1.7	1.4	10.1	8.7


Settlement loss	—		—	0.3	0.6	0.3	0.6
Net periodic pension cost	$	1.9	2.4	4.0	3.8	5.9	6.2






Nine months ended September 30,

Service cost	$	—	—	6.8	7.7	6.8	7.7
Interest cost on projected benefit obligation	15.9		20.0	9.0	8.4	24.9	28.4
Return on assets – expected	(35.5)		(34.7)	(9.3)	(8.8)	(44.8)	(43.5)
Amortization of losses	25.4		21.4	5.0	3.8	30.4	25.2
Amortization of prior service cost	—		—	(0.1)	—	(0.1)	—
Curtailment gain	—		—	(0.6)	—	(0.6)	—
Settlement loss	—		—	1.0	1.1	1.0	1.1
Net periodic pension cost	$	5.8	6.7	11.8	12.2	17.6	18.9

The components of net periodic postretirement cost related to retirement benefits other than pensions were as follows:


	UMWA Plans			Black Lung and Other Plans		Total
(In millions)	2021		2020	2021	2020	2021	2020

Three months ended September 30,


Interest cost on accumulated postretirement benefit obligations	$	2.4	3.2	0.8	0.9	3.2	4.1
Return on assets – expected	(3.1)		(3.3)	—	—	(3.1)	(3.3)
Amortization of losses	4.3		4.2	2.3	2.1	6.6	6.3
Amortization of prior service cost	(1.2)		(1.2)	—	—	(1.2)	(1.2)
Net periodic postretirement cost	$	2.4	2.9	3.1	3.0	5.5	5.9

Nine months ended September 30,

Service cost	$	—	—	0.1	0.1	0.1	0.1
Interest cost on accumulated postretirement benefit obligations	7.3		9.6	2.4	2.8	9.7	12.4
Return on assets – expected	(9.2)		(9.8)	—	—	(9.2)	(9.8)
Amortization of losses	13.3		12.3	6.7	6.2	20.0	18.5
Amortization of prior service cost	(3.5)		(3.5)	(0.2)	(0.2)	(3.7)	(3.7)
Net periodic postretirement cost	$	7.9	8.6	9.0	8.9	16.9	17.5