Financial Instruments (Schedule Of Financial Instruments Measured And Recorded At Fair Value On Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Financial Instrument [Line Items]
Cash equivalents	$ 627	$ 739
Marketable securities	524	896
Long-term marketable securities	180	149
Other assets	10	10
Total liabilities measured at fair value		2
Assets, Fair Value Disclosure	1,344	1,794
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Cash equivalents	427	738
Marketable securities	1	0
Long-term marketable securities	1	9
Other assets	10	10
Total liabilities measured at fair value		0
Assets, Fair Value Disclosure	439	757
Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Cash equivalents	200	1
Marketable securities	491	858
Long-term marketable securities	179	140
Other assets	0	0
Total liabilities measured at fair value		2
Assets, Fair Value Disclosure	873	999
Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Cash equivalents	0	0
Marketable securities	32	38
Long-term marketable securities	0	0
Other assets	0	0
Total liabilities measured at fair value		0
Assets, Fair Value Disclosure	32	38
Money Market Funds [Member]
Financial Instrument [Line Items]
Cash equivalents	427	738
Long-term marketable securities	1	9
Other assets	10	10
Money Market Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Cash equivalents	427	738
Long-term marketable securities	1	9
Other assets	10	10
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Cash equivalents	0	0
Long-term marketable securities	0	0
Other assets	0	0
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Cash equivalents	0	0
Long-term marketable securities	0	0
Other assets	0	0
Commercial Paper [Member]
Financial Instrument [Line Items]
Cash equivalents	200	1
Marketable securities	341	698
Commercial Paper [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Cash equivalents	0	0
Marketable securities	0	0
Commercial Paper [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Cash equivalents	200	1
Marketable securities	341	698
Commercial Paper [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Cash equivalents	0	0
Marketable securities	0	0
Time Deposits [Member]
Financial Instrument [Line Items]
Marketable securities	100	160
Time Deposits [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Marketable securities	0	0
Time Deposits [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Marketable securities	100	160
Time Deposits [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Marketable securities	0	0
Auction Rate Securities [Member]
Financial Instrument [Line Items]
Marketable securities	32	38
Auction Rate Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Marketable securities	0	0
Auction Rate Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Marketable securities	0	0
Auction Rate Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Marketable securities	32	38
Marketable Equity Securities [Member]
Financial Instrument [Line Items]
Marketable securities	1
Marketable Equity Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Marketable securities	1
Marketable Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Marketable securities	0
Marketable Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Marketable securities	0
Corporate Bonds [Member]
Financial Instrument [Line Items]
Long-term marketable securities	179	140
Corporate Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Long-term marketable securities	0	0
Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Long-term marketable securities	179	140
Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Long-term marketable securities	0	0
Foreign Currency Derivative Contracts [Member]
Financial Instrument [Line Items]
Prepaid expenses and other current assets	3
Total liabilities measured at fair value		2
Foreign Currency Derivative Contracts [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Financial Instrument [Line Items]
Prepaid expenses and other current assets	0
Total liabilities measured at fair value		0
Foreign Currency Derivative Contracts [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Instrument [Line Items]
Prepaid expenses and other current assets	3
Total liabilities measured at fair value		2
Foreign Currency Derivative Contracts [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Instrument [Line Items]
Prepaid expenses and other current assets	0
Total liabilities measured at fair value		$ 0