Changes in Shareholder's Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2007	Sep. 29, 2013	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013 Convertible Note	Sep. 30, 2012 Convertible Note	Sep. 29, 2013 Convertible Note	Sep. 30, 2012 Convertible Note	Sep. 29, 2013 Stock Option	Sep. 30, 2012 Stock Option	Sep. 29, 2013 Stock Option	Sep. 30, 2012 Stock Option
Shareholders Equity [Line Items]
Repurchase of outstanding common stock, authorized amount	$ 300
Convertible senior subordinated notes maturity year		2017	2017
Convertible senior subordinated notes interest rate		3.875%	3.875%	3.875%
Average market price of common stock		$ 61.32	$ 61.32
Shares issuable upon exercise of warrants included in diluted shares		0.3	0.3
Number of shares under warrants exercised			7.4
Weighted average antidilutive which were not included in the calculation of earnings per share					1.4	0.3	1.4	0.1	8.0	8.4	7.9	9.0
Strike price of the warrants			$ 74.65