Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2018

Pension Plans, Defined Benefit

Schedule of Components of Net Periodic Benefit Cost

The components of total Net Periodic Benefit Cost associated with the Company’s defined benefit retirement plans are as follows:

	Three months ended
	March 31, 2018			March 31, 2017
Service cost	$	6.4		$	6.0
Interest cost		5.1			5.3
Expected return on plan assets		(6.2	)		(5.3	)
Amortization prior service cost		0.1			0.1
Amortization of actuarial loss		0.9			2.0
Net Periodic Benefit Cost	$	6.3		$	8.1