Employee benefit plans (Tables)

3 Months Ended

Mar. 31, 2020

Postemployment Benefits [Abstract]

Components of Net Periodic Benefit Cost (Credit)

The following table summarizes the components of net periodic (benefit) cost recognized in the condensed consolidated statements of operations:

	Domestic - Defined Benefit Pension Plans				Foreign - Defined Benefit Pension Plans
	Three months ended March 31,				Three months ended March 31,
(in millions)	2020		2019		2020		2019
Service cost (1)	$	—	$	—	$	0.5	$	0.6
Interest cost (2)	5.8		6.8		3.1		3.9
Expected return on plan assets (2)	(7.1)		(6.3)		(4.0)		(5.0)
Net periodic (benefit) cost	$	(1.3)	$	0.5	$	(0.4)	$	(0.5)

(1)Service cost is included in warehouse, selling and administrative expenses.

(2)These amounts are included in other expense, net.