Segment Data - Revenues to Unaffiliated Customers and Long-lived Assets Including Property, Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 18,870	$ 19,131	$ 16,074
Long-Lived Assets	44,792	44,606	44,606
Corporate
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	442	465	411
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	10,722	10,371	9,161
Long-Lived Assets	36,617	35,896	36,317
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,043	4,548	3,734
Long-Lived Assets	5,126	5,778	5,660
Greater Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,047	3,069	2,384
Long-Lived Assets	1,528	1,607	1,466
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,058	1,142	794
Long-Lived Assets	$ 1,079	$ 860	$ 753