Intangible Assets and Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 15,958	$ 15,910
Goodwill from acquisitions, net of adjustments	2,320	63
Foreign currency translation	(491)	(15)
Goodwill, end of period	$ 17,787	$ 15,958