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Cash and Investments, Available-for-Sale Investments (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 29, 2013 | Jun. 30, 2012 | Jun. 29, 2013 | Jun. 30, 2012 | Dec. 29, 2012
Available-For-Sale Investments [Abstract] |  |  |  |  |
Gross Unrealized Gains | $ 2,030 |  | $ 2,030 |  | $ 1,079
Gross Unrealized Losses | (17) |  | (17) |  | (5)
Fair Value | 10,992 |  | 10,992 |  |
Adjusted Cost, Total | 14,340 |  | 14,340 |  | 12,927
Fair Value, Total | 16,353 |  | 16,353 |  | 14,001
Due in 1 year or less, Cost | 9,247 |  | 9,247 |  |
Due in 1-2 years, Cost | 1,213 |  | 1,213 |  |
Due in 2-5 years, Cost | 415 |  | 415 |  |
Instruments not due at a single maturity date, Cost | 112 |  | 112 |  |
Cost, Total | 10,987 |  | 10,987 |  |
Due in 1 year or less, Fair Value | 9,251 |  | 9,251 |  |
Due in 1-2 years, Fair Value | 1,220 |  | 1,220 |  |
Due in 2-5 years, Fair Value | 413 |  | 413 |  |
Instruments not due at a single maturity date, Fair Value | 108 |  | 108 |  |
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds | 294 | 274 | 598 | 607 |
Asset-Backed Securities [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 12 |  | 12 |  | 14
Gross Unrealized Gains | 0 |  | 0 |  | 0
Gross Unrealized Losses | (3) |  | (3) |  | (3)
Fair Value | 9 |  | 9 |  | 11
Bank Deposits [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 2,068 |  | 2,068 |  | 1,417
Gross Unrealized Gains | 3 |  | 3 |  | 1
Gross Unrealized Losses | (1) |  | (1) |  | 0
Fair Value | 2,070 |  | 2,070 |  | 1,418
Commercial Paper [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 4,389 |  | 4,389 |  | 4,184
Gross Unrealized Gains | 0 |  | 0 |  | 1
Gross Unrealized Losses | 0 |  | 0 |  | 0
Fair Value | 4,389 |  | 4,389 |  | 4,185
Corporate Bonds [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 2,624 |  | 2,624 |  | 635
Gross Unrealized Gains | 14 |  | 14 |  | 8
Gross Unrealized Losses | (5) |  | (5) |  | (1)
Fair Value | 2,633 |  | 2,633 |  | 642
Government Bonds [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 1,794 |  | 1,794 |  | 2,235
Gross Unrealized Gains | 0 |  | 0 |  | 0
Gross Unrealized Losses | (2) |  | (2) |  | 0
Fair Value | 1,792 |  | 1,792 |  | 2,235
Marketable Equity Securities [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Gross Unrealized Gains | 2,013 |  | 2,013 |  | 1,069
Gross Unrealized Losses | (5) |  | (5) |  | (1)
Adjusted Cost | 3,353 |  | 3,353 |  | 3,356
Fair Value | 5,361 |  | 5,361 |  | 4,424
Money Market Fund Deposits [Member] |  |  |  |  |
Available-For-Sale Investments [Abstract] |  |  |  |  |
Adjusted Cost | 100 |  | 100 |  | 1,086
Gross Unrealized Gains | 0 |  | 0 |  | 0
Gross Unrealized Losses | (1) |  | (1) |  | 0
Fair Value | $ 99 |  | $ 99 |  | $ 1,086

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