Recent Accounting Standards Recent Accounting Standards (Details) - New Accounting Pronouncement, Early Adoption, Effect [Member] $ in Millions	Dec. 26, 2015 USD ($)
Current Deferred Tax Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change In Accounting Principle, Effect of Change on Assets	$ (2,000)
Non-Current Deferred Tax Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change In Accounting Principle, Effect of Change on Assets	430
Current Deferred Tax Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Liabilities	(21)
Non-Current Deferred Tax Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Liabilities	$ (1,600)