Business Segment and Geographic Information (Schedule of Geographic Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 10,323.0	$ 8,856.3	$ 8,918.9
Long-Lived Assets	13,254.6	11,964.7	10,337.6
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	3,895.8	3,359.6	3,351.8
Long-Lived Assets	5,187.8	4,633.9	3,721.3
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	1,828.0	1,719.7	1,730.2
Long-Lived Assets	4,137.7	3,719.4	3,302.6
Other foreign operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	4,599.2	3,777.0	3,836.9
Long-Lived Assets	$ 3,929.1	$ 3,611.4	$ 3,313.7