Commitments and contingencies (Tables)

6 Months Ended

Jun. 27, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedule of warranty liabilities

The following summarizes the movements in the warranty liability for the six months ended June 27, 2020 and June 29, 2019, respectively:

	Six months ended
(dollars in millions)	June 27, 2020		June 29, 2019
Balance as of the beginning of the period	$	17.7	$	14.3
Charge for the period	7.2		6.8
Payments made	(4.7)		(5.8)
Released during the period	(0.8)		(0.1)
Foreign currency translation	(0.1)		0.1
Balance as of the end of the period	$	19.3	$	15.3