Intangible assets (Tables)

9 Months Ended

Sep. 26, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

	As of September 26, 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	$	2,009.3	$	(742.3)	$	1,267.0	$	2,021.8	$	(656.3)	$	1,365.5
—Technology	90.6		(88.3)		2.3		90.8		(87.8)		3.0
—Capitalized software	86.9		(46.5)		40.4		76.1		(38.0)		38.1
	2,186.8		(877.1)		1,309.7		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	$	2,700.2	$	(921.1)	$	1,779.1	$	2,702.1	$	(826.1)	$	1,876.0

Schedule of indefinite-lived intangible assets

	As of September 26, 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	$	2,009.3	$	(742.3)	$	1,267.0	$	2,021.8	$	(656.3)	$	1,365.5
—Technology	90.6		(88.3)		2.3		90.8		(87.8)		3.0
—Capitalized software	86.9		(46.5)		40.4		76.1		(38.0)		38.1
	2,186.8		(877.1)		1,309.7		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	$	2,700.2	$	(921.1)	$	1,779.1	$	2,702.1	$	(826.1)	$	1,876.0