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Performance Contingent TSR Shares (Detail) - Total Shareholders Return - Omnibus Plan
shares in Thousands
12 Months Ended
Dec. 29, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares granted | shares 440
Vesting date Mar. 01, 2022
Fair value per share | $ / shares $ 21.58