Financial Instruments (Details) (Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments not Recorded at Fair Value) - USD ($) $ in Millions		Mar. 26, 2016	Dec. 26, 2015
Financial Instrument [Line Items]
Short-term debt, at carrying amount		$ 230	$ 230
Long-term debt, at carrying amount	[1]	2,002	2,000
Unamortized debt issuance costs		23	25
Fair Value, Inputs, Level 2
Financial Instrument [Line Items]
Short-term debt, at estimated fair value		230	230
Long-term debt, at estimated fair value		$ 1,476	$ 1,372

[1] Carrying amounts of long-term debt are net of unamortized debt issuance costs of $23 million as of March 26, 2016 and $25 million as of December 26, 2015, based on the adoption of ASU 2015-03