Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Dec. 30, 2011
Fair Value
Fair Value, by Balance Sheet Grouping
Investments	$ 179	$ 643
Fair Value \| Less than 1 year
Fair Value, by Balance Sheet Grouping
Investments	41	523
Fair Value \| 1 - 2 years
Fair Value, by Balance Sheet Grouping
Investments	39	32
Fair Value \| 2 - 5 years
Fair Value, by Balance Sheet Grouping
Investments	79	73
Fair Value \| Greater than 5 years
Fair Value, by Balance Sheet Grouping
Investments	20	15
Fair Value \| Certificates of Deposit
Fair Value, by Balance Sheet Grouping
Investments	0	477
Fair Value \| Corporate Bonds
Fair Value, by Balance Sheet Grouping
Investments	131	98
Fair Value \| U.S. Treasury Obligations
Fair Value, by Balance Sheet Grouping
Investments	33	53
Fair Value \| Auction Rate Securities
Fair Value, by Balance Sheet Grouping
Investments	15	15
Fair Value \| Level 2
Fair Value, by Balance Sheet Grouping
Investments	164	628
Long-term Debt Including Current Maturities	10,621	10,708
Fair Value \| Level 2 \| Certificates of Deposit
Fair Value, by Balance Sheet Grouping
Investments	0	477
Fair Value \| Level 2 \| Corporate Bonds
Fair Value, by Balance Sheet Grouping
Investments	131	98
Fair Value \| Level 2 \| U.S. Treasury Obligations
Fair Value, by Balance Sheet Grouping
Investments	33	53
Fair Value \| Level 3
Fair Value, by Balance Sheet Grouping
Investments	15	15
Fair Value \| Level 3 \| Auction Rate Securities
Fair Value, by Balance Sheet Grouping
Investments	15	15
Carrying Value
Fair Value, by Balance Sheet Grouping
Amortized cost basis of investments	178	643
Carrying Value \| Level 2
Fair Value, by Balance Sheet Grouping
Long-term Debt Including Current Maturities	$ 9,089	$ 9,241

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.

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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.

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