Retirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2021

Pension Plan

Defined Benefit Plan Disclosure [Line Items]

Net periodic benefit cost for the Company's retirement benefit plans

The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans. The amounts for the three and six months ended June 30, 2021 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of that period’s proportionate share of the amounts to be recorded for the year ending December 31, 2021.

	U.S. Plans				International Plans				Total
	Three Months Ended June 30,				Three Months Ended June 30,				Three Months Ended June 30,
	2021		2020		2021		2020		2021		2020
Components of net periodic benefit    cost (credit):
Service cost	$	2.3	$	2.7	$	0.5	$	0.4	$	2.8	$	3.1
Interest cost	4.5		5.3		1.1		1.3		5.6		6.6
Expected return on plan assets	(6.1)		(6.4)		(2.6)		(2.1)		(8.7)		(8.5)
Amortization of prior service cost	0.3		0.4		0.1		0.1		0.4		0.5
Recognition of net actuarial losses	3.5		8.8		—		—		3.5		8.8
Net periodic benefit cost (credit)	$	4.5	$	10.8	$	(0.9)	$	(0.3)	$	3.6	$	10.5

	U.S. Plans				International Plans				Total
	Six Months Ended June 30,				Six Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
Components of net periodic benefit    cost (credit):
Service cost	$	4.8	$	5.4	$	1.0	$	0.8	$	5.8	$	6.2
Interest cost	8.9		10.5		2.2		2.8		11.1		13.3
Expected return on plan assets	(12.2)		(12.7)		(5.1)		(4.3)		(17.3)		(17.0)
Amortization of prior service cost	0.6		0.8		0.1		0.1		0.7		0.9
Recognition of net actuarial losses	4.4		8.8		—		—		4.4		8.8
Net periodic benefit cost (credit)	$	6.5	$	12.8	$	(1.8)	$	(0.6)	$	4.7	$	12.2