Goodwill and Other Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Acquired finite-lived intangible assets:
Gross Value	$ 185.2	$ 186.4
Accumulated Amortization	(155.6)	(143.8)
Total	29.6	42.6
Total intangible assets, Gross Value	192.1	193.3
Total intangible assets, Net Value	36.5	49.5
Aggregate amortization expense for finite-live intangible assets	13.0	19.1	$ 32.8
Trade names
Acquired finite-lived intangible assets:
Indefinite-lived trade names	6.9	6.9
Customer relationships
Acquired finite-lived intangible assets:
Gross Value	83.7	84.1
Accumulated Amortization	(67.1)	(58.2)
Total	16.6	25.9
Contracts and backlog
Acquired finite-lived intangible assets:
Gross Value	71.3	72.1
Accumulated Amortization	(69.4)	(69.4)
Total	1.9	2.7
Developed technology and technical know-how
Acquired finite-lived intangible assets:
Gross Value	23.1	23.1
Accumulated Amortization	(13.3)	(10.9)
Total	9.8	12.2
Trade names
Acquired finite-lived intangible assets:
Gross Value	5.3	5.3
Accumulated Amortization	(4.9)	(4.6)
Total	0.4	0.7
Favorable operating lease
Acquired finite-lived intangible assets:
Gross Value	1.8	1.8
Accumulated Amortization	(0.9)	(0.7)
Total	$ 0.9	$ 1.1