Intangible assets

3 Months Ended

Mar. 28, 2020

Goodwill and Intangible Assets Disclosure [Abstract]


	As of March 28, 2020										As of December 28, 2019
(dollars in millions)	Cost		Accumulated amortization and impairment		Net		Cost		Accumulated amortization and impairment		Net
Finite-lived:
—Customer relationships	$	1,964.8	$	(667.2)	$	1,297.6	$	2,021.8	$	(656.3)	$	1,365.5
—Technology	90.4		(87.8)		2.6		90.8		(87.8)		3.0
—Capitalized software	81.8		(41.5)		40.3		76.1		(38.0)		38.1
	2,137.0		(796.5)		1,340.5		2,188.7		(782.1)		1,406.6
Indefinite-lived:
—Brands and trade names	513.4		(44.0)		469.4		513.4		(44.0)		469.4
Total intangible assets	$	2,650.4	$	(840.5)	$	1,809.9	$	2,702.1	$	(826.1)	$	1,876.0

During the three months ended March 28, 2020, the amortization expense recognized in respect of intangible assets was $32.2 million, compared with $32.6 million for the three months ended March 30, 2019. In addition, movements in foreign currency exchange rates resulted in a decrease in the net carrying value of total intangible assets of $38.4 million for the three months ended March 28, 2020, compared with an increase of $3.3 million for the three months ended March 30, 2019.