Stock Repurchases (Detail) $ in Thousands	12 Months Ended
	Dec. 29, 2018 USD ($) shares
Number of shares
Repurchased at beginning of period | shares	13,447,346
Repurchases | shares	349,691
Repurchased at end of period | shares	13,797,037
Aggregate Purchase Price
Repurchased at beginning balance | $	$ 752,352
Repurchases | $	88,312
Repurchased at end of period | $	$ 840,664