Fair Value Measurements (Schedule Of Assets And Liabilities Measured And Recorded At Fair Value On A Recurring Basis) (Details) (USD $) In Millions	Sep. 25, 2011		Dec. 31, 2010
Derivative assets	$ 49	[1]	$ 26	[1]
Derivative liabilities	25	[1]	33	[1]
Equity Securities [Member]
Fair value of investments measured on recurring basis	76	[2]	86	[2]
Equity Securities [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair value of investments measured on recurring basis	76	[2]	86	[2]
Mutual Funds [Member]
Fair value of investments measured on recurring basis	316	[2]	450	[2]
Mutual Funds [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair value of investments measured on recurring basis	316	[2]	450	[2]
U.S. Government Securities [Member]
Fair value of investments measured on recurring basis	225	[3]	719	[3]
U.S. Government Securities [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair value of investments measured on recurring basis	225	[3]	719	[3]
Other Securities [Member]
Fair value of investments measured on recurring basis	98	[3]	104	[3]
Other Securities [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair value of investments measured on recurring basis	98	[3]	104	[3]
Fair Value Hierarchy, Level 2 [Member]
Derivative assets	49	[1]	26	[1]
Derivative liabilities	$ 25	[1]	$ 33	[1]

[1] Derivative assets and liabilities relate to foreign currency exchange and interest rate swap contracts and are valued based on observable market prices (e.g., interest rates and yield curves observable at commonly quoted intervals), but are not exchanged in an active market.

[2] Equity securities and interests in mutual funds are valued using quoted market prices.

[3] U.S. Government securities and other securities, which consist primarily of corporate debt securities, U.S. Government-sponsored enterprise securities, and mortgage-backed securities, are valued based on inputs other than quoted prices that are observable for the asset (e.g., interest rates and yield curves observable at commonly quoted intervals).