Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The carrying amounts of goodwill as of December 31, 2017 and December 25, 2016 by reportable segment are as follows (in millions):

	As of December 31, 2017
	PSS		US		KGS		Total
Gross value	$	53.9	$	111.1	$	567.8	$	732.8
Less accumulated impairment	18.3		13.8		239.5		271.6
Net	$	35.6	$	97.3	$	328.3	$	461.2

	As of December 25, 2016
	PSS		US		KGS		Total
Gross value	$	53.9	$	111.1	$	567.8	$	732.8
Less accumulated impairment	18.3		13.8		215.3		247.4
Net	$	35.6	$	97.3	$	352.5	$	485.4

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 31, 2017							As of December 25, 2016
	Gross Value		Accumulated Amortization			Net Value		Gross Value		Accumulated Amortization			Net Value
Acquired finite-lived intangible assets:
Customer relationships	$	53.7	$	(50.2	)	$	3.5	$	53.7	$	(44.9	)	$	8.8
Contracts and backlog	30.8		(25.7		)	5.1		30.8		(23.7		)	7.1
Developed technology and technical know-how	25.0		(18.6		)	6.4		25.2		(15.7		)	9.5
Trade names	1.4		(1.3		)	0.1		1.4		(1.1		)	0.3
Total finite-lived intangible assets	110.9		(95.8		)	15.1		111.1		(85.4		)	25.7
Indefinite-lived trade names	6.9		—			6.9		6.9		—			6.9
Total intangible assets	$	117.8	$	(95.8	)	$	22.0	$	118.0	$	(85.4	)	$	32.6

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 31, 2017 is as follows (in millions):

Fiscal Year	Amount
2018	$	5.9
2019	5.1
2020	3.0
2021	1.1
Total	$	15.1