Payout Percentage of ROIC Awards (Detail) - Performance Contingent Return On Invested Capital Shares	12 Months Ended
	Dec. 30, 2017
2013 Award | Fiscal 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	125.00%
2014 Award | Fiscal 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	96.00%
2015 Award | Fiscal 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	87.00%