| **Fair Value Measurements And Financial Instruments Fair Value Measurements Recurring Basis Table (Details) (USD $)In Millions, unless otherwise specified** | Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011 |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|---------------|
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Total assets                                                                                                                                                 | $ 1,189       | $ 1,236       |          |
| Fair value of acquisition contingent consideration                                                                                                           | 188           | 0             | 0             |
| Liabilities, Fair Value Disclosure, Recurring                                                                                                                | 195           |          |          |
| Quoted Prices In Active Markets (Level 1) [Member]                                                                                                           |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Total assets                                                                                                                                                 | 1,189         | 1,236         |          |
| Liabilities, Fair Value Disclosure, Recurring                                                                                                                | 0             |          |          |
| Significant Other Observable Inputs (Level 2) [Member]                                                                                                       |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Total assets                                                                                                                                                 | 0             | 0             |          |
| Liabilities, Fair Value Disclosure, Recurring                                                                                                                | 0             |          |          |
| Significant Unobservable Inputs (Level 3) [Member]                                                                                                           |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Total assets                                                                                                                                                 | 0             | 0             |          |
| Liabilities, Fair Value Disclosure, Recurring                                                                                                                | 195           |          |          |
| Contingent Consideration Liability [Member]                                                                                                                  |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Fair value of acquisition contingent consideration                                                                                                           | 195           |          |          |
| Contingent Consideration Liability [Member] | Quoted Prices In Active Markets (Level 1) [Member]                                                             |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Fair value of acquisition contingent consideration                                                                                                           | 0             |          |          |
| Contingent Consideration Liability [Member] | Significant Other Observable Inputs (Level 2) [Member]                                                         |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Fair value of acquisition contingent consideration                                                                                                           | 0             |          |          |
| Contingent Consideration Liability [Member] | Significant Unobservable Inputs (Level 3) [Member]                                                             |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Fair value of acquisition contingent consideration                                                                                                           | 195           | 0             |          |
| Cash and Cash Equivalents [Member]                                                                                                                           |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Money Market Securities Fair Value Disclosure                                                                                                                | 875           | 964           |          |
| Cash and Cash Equivalents [Member] | Quoted Prices In Active Markets (Level 1) [Member]                                                                      |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Money Market Securities Fair Value Disclosure                                                                                                                | 875           | 964           |          |
| Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]                                                                  |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Money Market Securities Fair Value Disclosure                                                                                                                | 0             | 0             |          |
| Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]                                                                      |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Money Market Securities Fair Value Disclosure                                                                                                                | 0             | 0             |          |
| Other Current Assets [Member]                                                                                                                                |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Available-for-sale Securities, Fair Value Disclosure                                                                                                         | 35            | 41            |          |
| Other Current Assets [Member] | Quoted Prices In Active Markets (Level 1) [Member]                                                                           |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Available-for-sale Securities, Fair Value Disclosure                                                                                                         | 35            | 41            |          |
| Other Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]                                                                       |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Available-for-sale Securities, Fair Value Disclosure                                                                                                         | 0             | 0             |          |
| Other Current Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]                                                                           |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Available-for-sale Securities, Fair Value Disclosure                                                                                                         | 0             | 0             |          |
| Other Assets [Member]                                                                                                                                        |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Trading Securities, Fair Value Disclosure                                                                                                                    | 279           | 231           |          |
| Other Assets [Member] | Quoted Prices In Active Markets (Level 1) [Member]                                                                                   |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Trading Securities, Fair Value Disclosure                                                                                                                    | 279           | 231           |          |
| Other Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]                                                                               |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Trading Securities, Fair Value Disclosure                                                                                                                    | 0             | 0             |          |
| Other Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]                                                                                   |          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                             |          |          |          |
| Trading Securities, Fair Value Disclosure                                                                                                                    | $ 0           | $ 0           |          |

| X                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Securities that include funds traded in active markets and recorded at fair value based on quoted market prices.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.
+ References
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| X                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789
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