Other Income - Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Dec. 26, 2014
Property, Plant and Equipment [Line Items]
Interest Income	$ 10	$ 6	$ 5
Income from Real Estate Operations	27	83	23
Miscellaneous Income (Expense)	9	9	(36)
Total Other Income (Expense) - Net	46	98	(8)
Gross Revenue from Real Estate Operations included above	56	104	$ 47
Gain on sale of non-operating easements	$ 115
Gain (loss) on non-operating property
Property, Plant and Equipment [Line Items]
Gain on sale of non-operating easements		$ 59