Note 11. 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						Nine Months Ended
(millions of dollars)	Sep. 30, 2018			Oct. 1, 2017			Sep. 30, 2018			Oct. 1, 2017

Service cost	$	1.9		$	1.4		$	5.8		$	5.5
Interest cost		3.2			3.0			9.3			9.2
Expected return on plan assets		(5.0	)		(4.5	)		(14.6	)		(13.6	)
Amortization:
Prior service cost		0.1			0.5			0.3			1.7
Recognized net actuarial loss		2.9			2.1			8.4			6.3
Pension settlement loss		3.6			—			3.6			—
Net periodic benefit cost	$	6.7		$	2.5		$	12.8		$	9.1

	Other Benefits
	Three Months Ended						Nine Months Ended
(millions of dollars)	Sep. 30, 2018			Oct. 1, 2017			Sep. 30, 2018			Oct. 1, 2017

Service cost	$	0.1		$	0.1		$	0.2		$	0.2
Interest cost		—			0.1			0.1			0.2
Amortization:
Prior service cost		(0.2	)		(0.8	)		(0.7	)		(2.3	)
Recognized net actuarial (gain) loss		(0.2	)		(0.1	)		(0.5	)		(0.2	)
Net periodic benefit cost	$	(0.3	)	$	(0.7	)	$	(0.9	)	$	(2.1	)

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 $24.0 million to its pension plans and $0.5 million to its other postretirement benefit plans in 2018. As of September 30, 2018, $18.6 million has been contributed to the pension plans and approximately $0.1 million has been contributed to the other postretirement benefit plans.

Included in net periodic benefit cost for the three-month and nine-month periods ended September 30, 2018 are non-cash pension settlement costs of $3.6 million associated with our pension plans in the U.S.

On January 1, 2018, the Company retrospectively adopted the provisions of ASU 2017-07, "Compensation – Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost". Under the new standard, the Company classifies all net periodic benefit costs within the "Other non-operating income (deductions), net" line item on the consolidated statement of income. The line item classification changes required by the standard did not impact the Company's pre-tax earnings or net income; however, "Income from operations" and "Other non-operating income (deductions), net" changed by immaterial offsetting amounts.