Investments and Fair Value Measurements-Fixed Income Maturities (Details 7) - Fixed Income Securities [Member] - USD ($) $ in Thousands		Jan. 03, 2016	Dec. 28, 2014
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Due in one year or less		$ 1,321,975
After one year through five years		902,289
After five years through ten years		113,542
After ten years		392,894
Total, Amortized Cost	[1]	2,730,700	$ 4,233,395
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less		1,323,097
After one year through five years		902,452
After five years through ten years		113,516
After ten years		392,957
Total, Fair Value		$ 2,732,022	$ 4,238,761

[1] Amortized cost includes adjustments made to the cost basis of an investment for accretion, amortization and other-than temporary impairment.