Quarterly Financial Data (Unaudited) Summarized Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 177.5	$ 161.7	$ 160.8	$ 157.1	$ 192.1	$ 190.8	$ 205.5	$ 174.6	$ 657.1	$ 763.0	$ 844.1
Gross profit	42.2	40.4	40.9	38.3	45.1	42.4	48.1	43.8	161.8	179.4	204.5
Total operating income (loss) from continuing operations	1.5	1.6	(3.7)	(3.9)	5.6	(3.0)	2.3	0.4	(4.5)	5.3	18.2
Provision (benefit) for income taxes from continuing operations	(0.3)	(15.3)	2.3	1.9	0.8	(0.2)	1.2	2.1	(11.4)	3.9	1.1
Income (loss) from continuing operations	(7.0)	4.3	(16.0)	(14.5)	(2.8)	(11.3)	(48.2)	(13.4)
Income (loss) from discontinued operations	3.0	50.8	0.9	(1.7)	0.6	0.4	(1.7)	(1.6)
Net income (loss)	$ (4.0)	$ 55.1	$ (15.1)	$ (16.2)	$ (2.2)	$ (10.9)	$ (49.9)	$ (15.0)	$ 19.8	$ (78.0)	$ (37.2)
Basic and diluted income (loss) per common share:
Net loss from continuing operations (in dollars per share)					$ (0.05)	$ (0.20)	$ (0.84)	$ (0.23)
Net income (loss) from discontinued operations (in dollars per share)					0.01	0.01	(0.03)	(0.03)
Net loss per common share (in dollars per share)					$ (0.04)	$ (0.19)	$ (0.87)	$ (0.26)
Basic income (loss) per common share:
Net income (loss) from continuing operations (in dollars per share)	$ (0.12)	$ 0.07	$ (0.27)	$ (0.25)					$ (0.56)	$ (1.31)	$ (0.52)
Net income (loss) from discontinued operations (in dollars per share)	0.05	0.86	0.02	(0.03)					0.90	(0.04)	(0.13)
Net income (loss) per common share (in dollars per share)	(0.07)	0.93	(0.25)	(0.28)					0.34	(1.35)	(0.65)
Diluted income (loss) per common share:
Net income (loss) from continuing operations (in dollars per share)	(0.12)	0.07	(0.27)	(0.25)					(0.56)	(1.31)	(0.52)
Net income (loss) from discontinued operations (in dollars per share)	0.05	0.85	0.02	(0.03)					0.90	(0.04)	(0.13)
Net income (loss) per common share (in dollars per share)	$ (0.07)	$ 0.92	$ (0.25)	$ (0.28)					$ 0.34	$ (1.35)	$ (0.65)