10. RETIREMENT PLANS

The Company’s most significant retirement plan is the U.S. plan for which the benefits are based on an average of the employee’s earnings in the years preceding retirement and on credited service. In a prior year, the Company closed participation in the Autoliv ASP, Inc. Pension Plan to exclude those employees hired after December 31, 2003. Within the U.S. there is also a non-qualified restoration plan that provides benefits to employees whose benefits in the primary U.S. plan are restricted by limitations on the compensation that can be considered in calculating their benefits. In December 2017 the Company decided to amend the U.S. defined pension plan, communicating a benefits freeze that will begin on December 31, 2021.

For the Company’s non-U.S. defined benefit plans the most significant individual plan resides in the U.K. The Company has closed participation in the U.K. defined benefit plan to exclude all employees hired after April 30, 2003 with few members accruing benefits.

The Net Periodic Benefit Costs from continuing operations related to Other Post-retirement Benefits were not significant to the condensed consolidated financial statements of the Company for the three and nine month periods ended September 30, 2018 and September 30, 2017 and are not included in the table below.

The components of total Net Periodic Benefit Cost from continuing operations associated with the Company’s defined benefit retirement plans are as follows (dollars in millions):

	Three months ended						Nine months ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Service cost	$	4.9		$	4.9		$	14.8		$	14.3
Interest cost		4.6			5.0			13.9			14.9
Expected return on plan assets		(5.6	)		(4.8	)		(16.8	)		(14.6	)
Amortization prior service cost		0.1			0.2			0.2			0.3
Amortization of actuarial loss		0.8			2.0			2.5			5.8
Net Periodic Benefit Cost	$	4.8		$	7.3		$	14.6		$	20.7

The Service cost and Amortization of prior service cost components from continuing operations are reported among other employee compensation costs in the Consolidated Statements of Income. The remaining components Interest cost, Expected return on plan assets and Amortization of actuarial loss are reported as Other non-operating items, net in the Consolidated Statements of Income.