Income Taxes - Schedule of Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 30, 2016	Dec. 25, 2015
Components of Deferred Tax Assets [Abstract]
Pension Plans	$ 125	$ 207
Other Employee Benefit Plans	272	258
Other	225	261
Total	622	726
Components of Deferred Tax Liabilities [Abstract]
Accelerated Depreciation	9,925	9,614
Other	293	291
Total	10,218	9,905
Net Deferred Income Tax Liabilities	$ 9,596	$ 9,179