Commitments and contingencies (Tables)

3 Months Ended

Mar. 28, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedule of warranty liabilities

The following summarizes the movements in the warranty liability for the three months ended March 28, 2020 and March 30, 2019, respectively:

	Three months ended
(dollars in millions)	March 28, 2020		March 30, 2019
Balance as of the beginning of the fiscal year	$	17.7	$	14.3
Charge for the period	4.2		2.6
Payments made	(2.6)		(2.2)
Released during the period	(0.8)		—
Foreign currency translation	(0.2)		0.1
Balance as of the end of the period	$	18.3	$	14.8