Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Jun. 27, 2020 USD ($) $ / shares shares
Number of Restricted Stock Units
Beginning balance (in shares) | shares	81,517
RSUs granted (in shares) | shares	37,815
RSUs vested (in shares) | shares	(37,076)
RSUs canceled (in shares) | shares	(3,122)
Ending balance (in shares) | shares	79,134
Weighted-Average Grant Date Fair Value Per RSU
Beginning balance (in dollars per share) | $ / shares	$ 169.18
RSUs granted (in dollars per share) | $ / shares	229.58
RSUs vested (in dollars per share) | $ / shares	161.71
RSUs canceled (in dollars per share) | $ / shares	190.50
Ending balance (in dollars per share) | $ / shares	$ 200.70
Aggregate Fair Value
Aggregate fair value of RSUs | $	$ 27,984