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Employee Share Plan - Stock Award Activity (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Stock Option Activity [Abstract]  
Outstanding Beginning balance, Number of Options 7,541
Granted, Number of Options 1,497
Exercised or released, Number of Options (1,846)
Expired or canceled, Number of Options (1,157)
Outstanding Ending balance, Number of Options 6,035
Exercisable Ending balance, Number of Options 2,695
Outstanding beginning balance, Weighted Average Exercise Price Per Share $ 7.18
Granted, Weighted Average Exercise Price Per Share $ 6.52
Exercised or released, Weighted Average Exercise Price Per Share $ 7.57
Expired or canceled, Weighted Average Exercise Price Per Share $ 7.28
Outstanding Ending balance, Weighted Average Exercise Price Per Share $ 6.88
Exercisable Ending balance, Weighted Average Exercise Price $ 7.33
Weighted Average Remaining Contractual Term , Outstanding 3 years 4 months 2 days
Weighted Average Remaining Contractual Term , Vested and Exercisable at Dec 31, 2013 2 years 22 days
Aggregate Intrinsic value, Outstanding Ending Balance $ 13.5
Aggregate Intrinsic value, Vested and exercisable at Dec 31, 2013 $ 4.8