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Financial Instruments and Risk Management (Details 6) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Long-term Debt    
Total long-term debt $ 1,159 $ 1,695
Details of securities that currently are in an unrealized loss position    
Less than 12 months, Fair Values 79 161
Less than 12 months, Unrealized Losses 0 (15)
More than 12 months, Fair Values 147 317
More than 12 months, Unrealized Losses (6) (5)
Total, Fair Values 226 478
Total, Unrealized Losses (6) (20)
Senior debt floating rate notes [Member]
    
Details of securities that currently are in an unrealized loss position    
Less than 12 months, Fair Values 79 0
Less than 12 months, Unrealized Losses 0 0
More than 12 months, Fair Values 147 317
More than 12 months, Unrealized Losses (6) (5)
Total, Fair Values 226 317
Total, Unrealized Losses (6) (5)
Micron shares classified as available-for-sale [Member]
    
Details of securities that currently are in an unrealized loss position    
Less than 12 months, Fair Values   161
Less than 12 months, Unrealized Losses   (15)
More than 12 months, Fair Values   0
More than 12 months, Unrealized Losses   0
Total, Fair Values   161
Total, Unrealized Losses   (15)
Carrying Amount [Member]
    
Long-term Debt    
Funding program loans from European Investment Bank 485 592
Senior Bonds 453 569
Convertible debt 221 534
Estimated Fair Value [Member]
    
Long-term Debt    
Funding program loans from European Investment Bank 485 591
Senior Bonds 452 566
Convertible debt 218 528
Total long-term debt $ 1,155 $ 1,685