Retirement Benefit Plans

The Company has a number of defined benefit pension plans and other postretirement benefit plans covering eligible salaried and hourly employees and their dependents. The estimated contributions to the Company's defined benefit pension plans for 2017 range from $15.0 million to $25.0 million, of which $11.4 million has been contributed through the first nine months of the year. The other postretirement benefit plans, which provide medical and life insurance benefits, are unfunded plans.

The components of net periodic benefit cost recorded in the Condensed Consolidated Statements of Operations are as follows:



	Pension benefits												Other postretirement employee benefits
(in millions)	2017						2016						Other postretirement employee benefits
Three Months Ended September 30,	US			Non-US			US			Non-US			2017			2016
Service cost	$	—		$	4.5		$	—		$	4.1		$	—		$	—
Interest cost	2.2			2.8			2.4			3.1			0.8			1.0
Expected return on plan assets	(3.3		)	(6.0		)	(3.7		)	(6.1		)	—			—
Amortization of unrecognized prior service credit	(0.2		)	—			(0.2		)	—			(1.1		)	(1.2		)
Amortization of unrecognized loss	1.1			2.0			1.3			1.6			0.4			0.5
Net periodic benefit (income) cost	$	(0.2	)	$	3.3		$	(0.2	)	$	2.7		$	0.1		$	0.3



	Pension benefits												Other postretirement employee benefits
(in millions)	2017						2016						Other postretirement employee benefits
Nine Months Ended September 30,	US			Non-US			US			Non-US			2017			2016
Service cost	$	—		$	13.3		$	—		$	12.3		$	0.1		$	0.1
Interest cost	6.6			8.0			7.2			9.6			2.4			2.9
Expected return on plan assets	(9.8		)	(17.4		)	(11.2		)	(18.7		)	—			—
Amortization of unrecognized prior service credit	(0.6		)	—			(0.6		)	—			(3.1		)	(3.6		)
Amortization of unrecognized loss	3.2			5.8			3.8			4.7			1.0			1.6
Net periodic benefit (income) cost	$	(0.6	)	$	9.7		$	(0.8	)	$	7.9		$	0.4		$	1.0