Stock-Based Compensation Plans (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended	12 Months Ended
Dec. 31, 2011	Apr. 02, 2011
Summary of option plans activity
Number of Shares, Beginning balance	24,969	31,026
Number of Shares, Granted	81	2,345
Number of Shares, Exercised	(2,454)	(5,704)
Number of Shares, Forfeited/cancelled/expired	(3,453)	(2,698)
Number of Shares, Ending balance	19,143	24,969
Number of Shares, Options exercisable	16,411	20,837
Weighted-Average Exercise Price Per Share, Beginning balance	$ 29.11	$ 30.51
Weighted-Average Exercise Price Per Share, Granted	$ 33.12	$ 26.36
Weighted-Average Exercise Price Per Share, Exercised	$ 24.83	$ 25.42
Weighted-Average Exercise Price Per Share, Forfeited/cancelled/expired	$ 37.10	$ 50.69
Weighted-Average Exercise Price Per Share, Ending balance	$ 28.23	$ 29.11
Weighted-Average Exercise Price Per Share, Options exercisable	$ 28.81	$ 30.08

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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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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