Amortized Cost and Fair Value of Available for Sale Securities by Expected Maturity (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Cost
Due in one year or less	$ 526,776	$ 563,272
Due after one year through five years	3,068,926	2,831,916
Due after five years through ten years	738,951	542,488
Due after ten years	6,448	6,783
Total	4,341,101	3,944,459
Fair Value
Due in one year or less	525,667	560,992
Due after one year through five years	3,062,717	2,768,971
Due after five years through ten years	760,561	541,852
Due after ten years	6,613	6,895
Total	$ 4,355,558	$ 3,878,710