Fair Value Measurements - Schedule of Available for Sale Securities Maturities (Details) $ in Millions	Oct. 01, 2017 USD ($)
Cost Basis
Due within one year	$ 2,974
Due after one year through five years	70
Due after five years through ten years	0
Total debt securities	3,044
Fair Value
Due within one year	2,974
Due after one year through five years	70
Due after five years through ten years	0
Total debt securities	$ 3,044