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Agreement with SK hynix (Details 3) (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013 | Jun. 11, 2013
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Patent License Agreement [Abstract] |  |
Antitrust litigation settlement |  | $ 1.9
Settlement of past infringement |  | 125.8
License agreement |  | 112.3
Total consideration | $ 240.0 | $ 240.0

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