Our Significant Accounting Policies Recently Issued Accounting Pronouncements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 110,000,000	$ 107,000,000	$ 74,000,000
Balance Sheet Related Disclosures [Abstract]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	639,000,000
Income Statement Location [Member]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	110,000,000	107,000,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0.07	0.07
Cash Flow Statement Location [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 269,000,000	$ 284,000,000