Retirement benefits (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

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

	U.S. Plans					Non-U.S. Plans				Total
(In millions)	2016			2015		2016		2015		2016		2015
Three months ended March 31,
Service cost	$	—		—		2.8		2.9		2.8		2.9
Interest cost on projected benefit obligation	9.2			9.0		3.4		3.2		12.6		12.2
Return on assets – expected	(13.7		)	(13.7	)	(2.3	)	(2.4	)	(16.0	)	(16.1	)
Amortization of losses	6.1			7.8		1.2		1.3		7.3		9.1
Settlement loss	—			—		0.8		2.3		0.8		2.3
Net periodic pension cost	$	1.6		3.1		5.9		7.3		7.5		10.4
Included in:
Continuing operations	$	1.6		3.1		5.9		6.2		7.5		9.3
Discontinued operations	—			—		—		1.1		—		1.1
Net periodic pension cost	$	1.6		3.1		5.9		7.3		7.5		10.4

Schedule of Costs of Retirement Plans

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)	2016			2015		2016	2015	2016		2015
Three months ended March 31,
Interest cost on accumulated postretirement benefit obligations	$	4.6		4.5		0.6	0.7	5.2		5.2
Return on assets – expected	(4.4		)	(5.2	)	—	—	(4.4	)	(5.2	)
Amortization of losses	4.3			4.3		0.5	0.7	4.8		5.0
Amortization of prior service (credit) cost	(1.1		)	(1.2	)	0.5	0.5	(0.6	)	(0.7	)
Net periodic postretirement cost	$	3.4		2.4		1.6	1.9	5.0		4.3