Cash, Cash Equivalents and Current Marketable Securities - Contractual Maturities of Available for Sale Securities (Details) $ in Millions	Jan. 01, 2017 USD ($)
Cost Basis
Due within one year	$ 474
Due after one year through five years	11,430
Due after five years through ten years	240
Total debt securities	12,144
Fair Value
Due within one year	474
Due after one year through five years	11,381
Due after five years through ten years	232
Total debt securities	$ 12,087