Other Income - Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2015	Dec. 26, 2014	Dec. 27, 2013
Property, Plant and Equipment [Line Items]
Interest Income	$ 6	$ 5	$ 8
Income from Real Estate Operations (a)	83	23	23
Miscellaneous Income (Expense)	9	(52)	(20)
Total Other Income (Expense) - Net	98	(24)	11
Gross Revenue from Real Estate Operations included above	104	47	$ 48
Reimbursement of environmental clean-ups costs	21
Environmental cleanup costs		21
Other expense recognized for early redemption premium		$ 16
Gain (loss) on non-operating property [Member]
Property, Plant and Equipment [Line Items]
Gain on sale of non-operating easements	$ 59