Stock-Based Compensation (Performance-Contingent Total Shareholder Return Shares) - Additional Information (Detail)	4 Months Ended
	Apr. 20, 2019
Performance Contingent Total Shareholders Return Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Total Shareholders Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, fair value assumptions, method used	Inputs into the model included the following for the company and comparator companies: (i) TSR from the beginning of the performance cycle through the measurement date; (ii) volatility; (iii) risk-free interest rates; and (iv) the correlation of the comparator companies’ TSR. The inputs are based on historical capital market data.
Total Shareholders Return | Fiscal 2019 | 2017 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vested shares	153.00%