Income Taxes (Deferred Income Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Components of Deferred Tax Assets [Abstract]
Pension Plans	$ 249	$ 300
Other Employee Benefit Plans	292	309
Other	278	354
Total	819	963
Components of Deferred Tax Liabilities [Abstract]
Accelerated Depreciation	8,544	8,148
Other	252	234
Total	8,796	8,382
Net Deferred Income Tax Liabilites	$ 7,977	$ 7,419