Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 27, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The carrying amounts of goodwill as of December 27, 2020 and December 29, 2019 by reportable segment are as follows (in millions):

	As of December 27, 2020
	US		KGS		Total
Gross value	$	127.6	$	609.6	$	737.2
Less accumulated impairment	13.8		239.5		253.3
Net	$	113.8	$	370.1	$	483.9

	As of December 29, 2019
	US		KGS		Total
Gross value	$	111.1	$	597.8	$	708.9
Less accumulated impairment	13.8		239.5		253.3
Net	$	97.3	$	358.3	$	455.6

Schedule of Acquired Finite-Lived Intangible Assets

The following table sets forth information for acquired finite-lived and indefinite-lived intangible assets (in millions): 

	As of December 27, 2020						As of December 29, 2019
	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Acquired finite-lived intangible assets:
Customer relationships	$	75.3	$	(55.7)	$	19.6	$	72.3	$	(53.3)	$	19.0
Contracts and backlog	33.4		(31.0)		2.4		32.0		(28.4)		3.6
Developed technology and technical know-how	29.9		(25.3)		4.6		25.0		(23.8)		1.2
Trade names	2.0		(1.9)		0.1		1.9		(1.6)		0.3
In-process research and development	9.4		—		9.4		8.5		—		8.5
Total finite-lived intangible assets	150.0		(113.9)		36.1		139.7		(107.1)		32.6
Indefinite-lived trade names	6.9		—		6.9		6.9		—		6.9
Total intangible assets	$	156.9	$	(113.9)	$	43.0	$	146.6	$	(107.1)	$	39.5

Schedule of Acquired Indefinite-Lived Intangible Assets

The following table sets forth information for acquired finite-lived and indefinite-lived intangible assets (in millions): 

	As of December 27, 2020						As of December 29, 2019
	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Acquired finite-lived intangible assets:
Customer relationships	$	75.3	$	(55.7)	$	19.6	$	72.3	$	(53.3)	$	19.0
Contracts and backlog	33.4		(31.0)		2.4		32.0		(28.4)		3.6
Developed technology and technical know-how	29.9		(25.3)		4.6		25.0		(23.8)		1.2
Trade names	2.0		(1.9)		0.1		1.9		(1.6)		0.3
In-process research and development	9.4		—		9.4		8.5		—		8.5
Total finite-lived intangible assets	150.0		(113.9)		36.1		139.7		(107.1)		32.6
Indefinite-lived trade names	6.9		—		6.9		6.9		—		6.9
Total intangible assets	$	156.9	$	(113.9)	$	43.0	$	146.6	$	(107.1)	$	39.5

Schedule of Future Amortization Expense of Finite-Lived Intangible Assets

The estimated future amortization expense of acquired intangible assets with finite lives as of December 27, 2020 is as follows (in millions):

Fiscal Year	Amount
2021	5.6
2022	3.9
2023	3.5
2024	3.4
2025	3.3
Thereafter	16.4
Total	$	36.1