Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Number of Restricted Stock Units
Beginning balance (in shares) | shares	201,501
RSUs granted (in shares) | shares	82,123
RSUs vested (in shares) | shares	(47,298)
RSUs canceled (in shares) | shares	(2,958)
Ending balance (in shares) | shares	233,368
Weighted-Average Grant Date Fair Value Per RSU
Beginning balance (in dollars per share) | $ / shares	$ 109.48
RSUs granted (in dollars per share) | $ / shares	149.85
RSUs vested (in dollars per share) | $ / shares	84.46
RSUs canceled (in dollars per share) | $ / shares	120.26
Ending balance (in dollars per share) | $ / shares	$ 128.62
Aggregate Fair Value
Aggregate fair value of RSUs | $	$ 30,322