Nature of Operations and Significant Accounting Policies (Nature of Operations) (Details) $ in Millions	1 Months Ended			12 Months Ended
	Nov. 30, 2015 employee	Oct. 31, 2015 employee	Nov. 30, 2014 employee	Dec. 25, 2015 USD ($)	Dec. 26, 2014 USD ($)	Dec. 27, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of weeks in fiscal reporting calendar				P52W	P52W	P52W
Number of weeks in fiscal quarter				P13W
Cost method, maximum percentage				20.00%
Cash equivalents, maximum maturity period				3 months
Short-term investments, minimum maturity period				3 months
Short-term investments, maximum maturity period				1 year
Allowance for doubtful accounts				$ 37	$ 41
Goodwill				63	63
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred				51	39
Workforce Reduction Plan [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions reduced | employee			300
Workforce Reduction Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred				4	39
Erwin, Tennessee and Corbin, Kentucky Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred				19	0
Number of positions reduced | employee		500
Union Agreement [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions reduced | employee	300
Union Agreement [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred				$ 28	$ 0