Our Significant Accounting Policies Recently Issued Accounting Pronouncements [Line Items] (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provisional net tax expense related to the TCJ Act	$ 2,451	$ 0	$ 0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		110	107
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets		639
Income Statement Location [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	115	110	107
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	233	19
Cash Flow Statement Location [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 295	$ 269	$ 284