Other Income - Net (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2014	Dec. 26, 2014		Dec. 27, 2013		Dec. 28, 2012
Other Income and Expenses [Abstract]
Interest Income		$ 5		$ 8		$ 5
Income from Real Estate Operations		23		23		81
Miscellaneous Expense		(52)	[1]	(20)	[1]	(13)	[1]
Total Other (Expense) Income - Net		(24)		11		73
Gross Revenue from Real Estate Operations included above		47		48		106
Change in Miscellaneous Expense		32
Environmental Remediation Expense		17
Other expense recognized for early redemption premium	$ 16

[1] Miscellaneous expense increased $32 million primarily due to an increase in estimated environmental cleanup costs of $17 million related to non-operating activities as well as costs of $16 million associated with the early redemption of long-term debt.