Tax Matters - Narrative (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Income Tax Examination [Line Items]
Effective tax rate for income from continuing operations	33.30%	28.20%	31.80%	28.40%