Long-Term Debt (Narrative) (Details) - USD ($)		12 Months Ended
	Jan. 19, 2016	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013	Jan. 30, 2015	Jun. 26, 2014	Feb. 28, 2014	Dec. 11, 2013	Apr. 16, 2013	Feb. 05, 2010
Debt Instrument [Line Items]
Long-term debt, fair value		$ 895,700,000	$ 1,200,000,000
Debt, average outstanding amount		$ 1,200,000,000	$ 1,200,000,000
Debt, weighted average interest rate (percent)		7.20%	7.60%
Cash interest paid		$ 91,500,000	$ 94,700,000	$ 103,000,000
Unamortized debt issuance costs		18,900,000	25,200,000
Gains (losses) on extinguishment of debt		(1,252,000)	(27,449,000)	(11,324,000)
Long-term debt [Member] | Term loan facility due 2017 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount									$ 360,000,000
Long-term debt, outstanding principal amount						$ 327,300,000
Debt, unamortized discount							$ 1,500,000
Gains (losses) on extinguishment of debt				$ (800,000)
Senior subordinated notes [Member] | 8.875% senior second lien notes due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount										$ 400,000,000
Long-term debt, outstanding principal amount						400,000,000
Unamortized debt issuance costs										9,400,000
Debt, unamortized discount										$ 2,800,000
Senior notes [Member] | 6.000% senior secured priority notes due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount						540,000,000
Long-term debt, outstanding principal amount		540,000,000	540,000,000
Unamortized debt issuance costs		9,100,000				14,700,000
Debt, unamortized discount		4,400,000				5,900,000
Junior subordinated debt [Member] | 8.500% junior secured priority notes due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount						250,000,000
Long-term debt, outstanding principal amount		248,000,000	248,000,000
Unamortized debt issuance costs		5,100,000				7,100,000
Debt, unamortized discount		2,400,000				$ 2,800,000
Gains (losses) on extinguishment of debt			400,000
Line of credit [Member] | ABL Facility due 2017 [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs		2,300,000	$ 3,000,000		$ 1,300,000			$ 300,000
Debt Instrument, Restrictive Covenants, Disposition Limitation with Exceptions		$ 35,000,000
Packaging Business [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Proceeds from sale of discontinued operations	$ 86,600,000