Note 12. Benefit Plans

The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees. Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation.

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018

Service cost	$	1.8		$	2.0
Interest cost		3.5			3.0
Expected return on plan assets		(4.6	)		(4.8	)
Amortization:
Prior service cost		0.1			0.2
Recognized net actuarial loss		2.3			2.7
Net periodic benefit cost	$	3.1		$	3.1

	Other Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018

Service cost	$	—		$	0.1
Interest cost		0.1			0.1
Amortization:
Prior service cost		—			(0.3	)
Recognized net actuarial (gain)		(0.2	)		(0.2	)
Net periodic benefit cost	$	(0.1	)	$	(0.3	)

Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income.

The Company expects to contribute approximately $9.7 million to its pension plans and $0.3 million to its other postretirement benefit plans in 2019. As of March 31, 2019, approximately $1.4 million has been contributed to the pension plans and no contributions to the other postretirement benefit plans.