Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Jul. 01, 2017 USD ($) $ / shares shares
Number of Restricted Stock Units
Beginning balance (in shares) | shares	99,089
RSUs granted (in shares) | shares	48,000
RSUs vested (in shares) | shares	(41,712)
RSUs canceled (in shares) | shares	(4,779)
Ending balance (in shares) | shares	100,598
Weighted-Average Grant Date Fair Value per Share
Beginning balance (in dollars per share) | $ / shares	$ 97.54
RSUs granted (in dollars per share) | $ / shares	120.09
RSUs vested (in dollars per share) | $ / shares	95.78
RSUs canceled (in dollars per share) | $ / shares	106.75
Ending balance (in dollars per share) | $ / shares	$ 108.59
Aggregate Fair Value
Aggregate fair value of restricted stock units | $	$ 14,488