Shareholders' Equity (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014 Restricted Stock Units (RSUs) [Member]	Aug. 31, 2014 2014 Stock Repurchase Program [Member]	Oct. 03, 2014 2014 Stock Repurchase Program [Member]	Aug. 31, 2014 2011 Stock Repurchase Program [Member]	Oct. 03, 2014 Retained Earnings [Member]	Oct. 03, 2014 Retained Earnings [Member]	Oct. 03, 2014 Minimum Employee Stock Option [Member]	Oct. 03, 2014 Maximum Employee Stock Option [Member]
Equity, Class of Stock [Line Items]
Restricted Stock Unit Award Vesting Period				3 years						4 years	5 years
Stock repurchase program approved amount					$ 300.0
Stock repurchased during period, shares	0		0
Stock Repurchased and Retired During Period, Shares		2,083,000
Common Stock Acquired and Retired, Average Cost Per Share		$ 31.20
Stock Repurchased and Retired During Period, Value		65.0						55.5	55.5
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 282.8	$ 52.3