Schedule of Stock Option Activity (Detail) (USD $)	3 Months Ended
Mar. 29, 2013
Shares
Outstanding - beginning of year	16,713,155
Exercised	(320)
Forfeited/expired	(367,125)
Outstanding - end of period	16,345,710
Exercisable - end of period	14,623,423
Shares vested or expected to vest	16,239,399
Weighted Average Exercise Price
Outstanding - beginning of year	$ 7.50
Exercised	$ 0.16
Forfeited/expired	$ 7.34
Outstanding - end of period	$ 7.51
Exercisable - end of period	$ 7.82
Shares vested or expected to vest	$ 7.53
Weighted Average Remaining Contractual Term (in years)
Outstanding - end of period	3 years 3 months 18 days
Exercisable - end of period	2 years 8 months 12 days
Shares vested or expected to vest	3 years 3 months 18 days
Aggregate Intrinsic Value
Outstanding - end of period
Exercisable - end of period
Shares vested or expected to vest

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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