Financial Instruments (Fair Values Of Financial Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Mar. 24, 2012		Mar. 19, 2011
Derivatives, Fair Value [Line Items]
Available-for-sale securities	$ 72	[1],[2]	$ 70	[1],[2]
Short-term investments-index funds	166	[1],[3]	177	[1],[3]
Prepaid forward contracts	37	[1],[4]	43	[1],[4]
Deferred compensation, Assets				[1],[5]
Deferred compensation, Liabilities	523	[1],[5]	553	[1],[5]
Total derivatives at fair value, Asset	461	[1]	469	[1]
Total derivatives at fair value, Liability	229	[1]	135	[1]
Total Financial Assets at fair value	736	[1]	759	[1]
Total Financial Liabilities at fair Value	752	[1]	688	[1]
Fair Value Financial Liabilities [Member]
Derivatives, Fair Value [Line Items]
Available-for-sale securities				[1],[2]
Derivatives Designated As Fair Value Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate derivatives	274	[1],[6]	293	[1],[6]
Derivatives Designated As Fair Value Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate derivatives	2	[1],[6]	4	[1],[6]
Derivatives Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts	9	[1],[7]	4	[1],[7]
Interest rate derivatives			3	[1],[6]
Commodity contracts	14	[1],[8]	90	[1],[8]
Derivatives designated as hedging instruments, Assets, Total	23	[1]	97	[1]
Derivatives Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts	18	[1],[7]	38	[1],[7]
Interest rate derivatives			12	[1],[6]
Commodity contracts	42	[1],[8]	17	[1],[8]
Derivatives designated as hedging instruments, Liabilities, Total	60	[1]	67	[1]
Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts	30	[1],[7]	6	[1],[7]
Interest rate derivatives	95	[1],[6]	14	[1],[6]
Commodity contracts	39	[1],[8]	59	[1],[8]
Derivatives not designated as hedging instruments, Assets, Total	164	[1]	79	[1]
Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Forward exchange contracts	9	[1],[7]	11	[1],[7]
Interest rate derivatives	128	[1],[6]	52	[1],[6]
Commodity contracts	30	[1],[8]	1	[1],[8]
Derivatives not designated as hedging instruments, Liabilities, Total	167	[1]	64	[1]
Level 1 Fair Values Of Assets And Liabilities [Member]
Derivatives, Fair Value [Line Items]
Deferred compensation, Liabilities	$ 49		$ 63

[1] Financial assets are classified on our balance sheet within prepaid expenses and other current assets and other assets, with the exception of available-for-sale securities and short-term investments. Financial liabilities are classified on our balance sheet within accounts payable, other current liabilities and other liabilities. Unless specifically indicated, all financial assets and liabilities are categorized as Level 2 assets or liabilities.

[2] Based on the price of common stock. Categorized as a Level 1 asset.

[3] Based on price changes in index funds used to manage a portion of market risk arising from our deferred compensation liability. Categorized as a Level 1 asset.

[4] Based primarily on the price of our common stock.

[5] Based on the fair value of investments corresponding to employees' investment elections. As of March 24, 2012 and March 19, 2011, $49 million and $63 million, respectively, are categorized as Level 1 liabilities. The remaining balances are categorized as Level 2 liabilities.

[6] Based on LIBOR forward rates.

[7] Based on recently reported market transactions of spot and forward rates.

[8] Based on recently reported market transactions, primarily swap arrangements, except for liabilities as of March 19, 2011, which primarily related to commodity futures contracts. The futures contracts are valued based on average prices on futures exchanges and categorized as Level 1 liabilities.