Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Mar. 29, 2013	Dec. 28, 2012
Fair Value [Member]
Fair Value, by Balance Sheet Grouping
Investments	$ 526	$ 743
Fair Value [Member] \| Less than 1 year [Member]
Fair Value, by Balance Sheet Grouping
Investments	362	587
Fair Value [Member] \| 1 - 2 years [Member]
Fair Value, by Balance Sheet Grouping
Investments	46	61
Fair Value [Member] \| 2 - 5 years [Member]
Fair Value, by Balance Sheet Grouping
Investments	99	76
Fair Value [Member] \| Greater than 5 years [Member]
Fair Value, by Balance Sheet Grouping
Investments	19	19
Fair Value [Member] \| Certificates of Deposit and Commercial Paper [Member]
Fair Value, by Balance Sheet Grouping
Investments	330	555
Fair Value [Member] \| Corporate Bonds [Member]
Fair Value, by Balance Sheet Grouping
Investments	130	122
Fair Value [Member] \| U.S. Government Securities [Member]
Fair Value, by Balance Sheet Grouping
Investments	51	51
Fair Value [Member] \| Auction Rate Securities [Member]
Fair Value, by Balance Sheet Grouping
Investments	15	15
Fair Value [Member] \| Level 2 [Member]
Fair Value, by Balance Sheet Grouping
Investments	511	728
Long-term Debt Including Current Maturities	10,940	11,562
Fair Value [Member] \| Level 2 [Member] \| Certificates of Deposit and Commercial Paper [Member]
Fair Value, by Balance Sheet Grouping
Investments	330	555
Fair Value [Member] \| Level 2 [Member] \| Corporate Bonds [Member]
Fair Value, by Balance Sheet Grouping
Investments	130	122
Fair Value [Member] \| Level 2 [Member] \| U.S. Government Securities [Member]
Fair Value, by Balance Sheet Grouping
Investments	51	51
Fair Value [Member] \| Level 3 [Member]
Fair Value, by Balance Sheet Grouping
Investments	15	15
Fair Value [Member] \| Level 3 [Member] \| Auction Rate Securities [Member]
Fair Value, by Balance Sheet Grouping
Investments	15	15
Carrying Value [Member]
Fair Value, by Balance Sheet Grouping
Amortized cost basis of investments	524	742
Carrying Value [Member] \| Level 2 [Member]
Fair Value, by Balance Sheet Grouping
Long-term Debt Including Current Maturities	$ 9,418	$ 9,832

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References+ Details