Financial Instruments (Available-For-Sale Securities) (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended | ||||||||||||||||||||||||||||||||
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Jun. 30, 2012
|
Jul. 02, 2011
|
Jun. 30, 2012
Cash Equivalents [Member]
|
Dec. 31, 2011
Cash Equivalents [Member]
|
Jun. 30, 2012
Cash Equivalents [Member]
Money Market Funds [Member]
|
Dec. 31, 2011
Cash Equivalents [Member]
Money Market Funds [Member]
|
Jun. 30, 2012
Cash Equivalents [Member]
Commercial Paper [Member]
|
Dec. 31, 2011
Cash Equivalents [Member]
Commercial Paper [Member]
|
Jun. 30, 2012
Cash Equivalents [Member]
U.S. Treasury and U.S. Agency Notes [Member]
|
Dec. 31, 2011
Cash Equivalents [Member]
U.S. Treasury and U.S. Agency Notes [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
Commercial Paper [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
Commercial Paper [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
U.S. Treasury and U.S. Agency Notes [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
U.S. Treasury and U.S. Agency Notes [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
Time Deposits [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
Time Deposits [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
Auction Rate Securities [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
Auction Rate Securities [Member]
|
Jun. 30, 2012
Marketable Securities [Member]
Marketable Equity Securities [Member]
|
Dec. 31, 2011
Marketable Securities [Member]
Marketable Equity Securities [Member]
|
Jun. 30, 2012
Long-Term Marketable Securities [Member]
|
Dec. 31, 2011
Long-Term Marketable Securities [Member]
|
Jun. 30, 2012
Long-Term Marketable Securities [Member]
Money Market Funds [Member]
|
Dec. 31, 2011
Long-Term Marketable Securities [Member]
Money Market Funds [Member]
|
Jun. 30, 2012
Long-Term Marketable Securities [Member]
Corporate Bonds [Member]
|
Dec. 31, 2011
Long-Term Marketable Securities [Member]
Corporate Bonds [Member]
|
Jun. 30, 2012
Other Assets [Member]
|
Dec. 31, 2011
Other Assets [Member]
|
Jun. 30, 2012
Other Assets [Member]
Money Market Funds [Member]
|
Dec. 31, 2011
Other Assets [Member]
Money Market Funds [Member]
|
Jun. 30, 2012
Auction Rate Securities [Member]
|
|
Financial Instrument [Line Items] | |||||||||||||||||||||||||||||||||
Available-for-sale Securities Pledged as Collateral | $ 10 | ||||||||||||||||||||||||||||||||
Sales Of Available-For-Sale Securities | 6 | 13 | |||||||||||||||||||||||||||||||
Fair Value | 894 | 739 | 294 | 738 | 350 | 1 | 250 | 0 | 564 | 896 | 406 | 698 | 50 | 0 | 75 | 160 | 32 | 38 | 1 | 0 | 180 | 149 | 1 | 9 | 179 | 140 | 10 | 10 | 10 | 10 | |||
Available-for-sale Securities, Debt Securities, Current | $ 32 |