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Common Stock Repurchases - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 31, 2012
Equity [Abstract]
Maximum amount authorized under stock repurchase program			$ 500.0
Date the Company's board of directors authorized stock repurchase programs			August 1, 2012
Value of shares remaining under stock repurchase program	417.9
Shares repurchased during the year, shares	8.6	4.6
Shares repurchased during the year, value	$ 60.8	$ 38.2

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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