Business Segment and Geographic Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Sales	$ 12,698.6	$ 10,323.0	$ 8,856.3
Operating income (loss)	2,338.8	2,281.4	2,237.6
Depreciation and amortization	1,338.2	1,321.3	1,185.0
Equity affiliates' income	481.5	294.1	264.8
Expenditures for long-lived assets	2,926.5	2,464.2	2,509.0
Investment in net assets of and advances to equity affiliates	3,353.8	1,649.3
Total assets	27,192.6	26,859.2
Operating Segments
Segment Reporting Information [Line Items]
Sales	12,698.6	10,323.0	8,856.3
Operating income (loss)	2,412.5	2,267.8	2,203.8
Depreciation and amortization	1,338.2	1,321.3	1,185.0
Equity affiliates' income	496.3	294.1	231.0
Expenditures for long-lived assets	2,926.5	2,464.2	2,509.0
Investment in net assets of and advances to equity affiliates	3,353.8	1,649.3
Total assets	27,192.6	26,859.2
Americas | Operating Segments
Segment Reporting Information [Line Items]
Sales	5,368.9	4,167.6	3,630.7
Operating income (loss)	1,174.4	1,065.5	1,012.4
Depreciation and amortization	629.5	611.9	559.5
Equity affiliates' income	98.2	112.5	84.3
Expenditures for long-lived assets	1,353.1	909.6	1,264.7
Investment in net assets of and advances to equity affiliates	434.4	383.8
Total assets	8,237.7	7,092.5
Asia | Operating Segments
Segment Reporting Information [Line Items]
Sales	3,143.3	2,920.8	2,716.5
Operating income (loss)	898.3	838.3	870.3
Depreciation and amortization	436.5	444.4	399.4
Equity affiliates' income	22.1	35.9	32.1
Expenditures for long-lived assets	779.2	792.3	690.3
Investment in net assets of and advances to equity affiliates	268.9	330.4
Total assets	6,968.7	7,349.4
Europe | Operating Segments
Segment Reporting Information [Line Items]
Sales	3,086.1	2,345.6	1,847.0
Operating income (loss)	503.4	529.4	454.8
Depreciation and amortization	195.2	204.5	175.9
Equity affiliates' income	78.2	62.8	51.8
Expenditures for long-lived assets	312.6	300.3	295.9
Investment in net assets of and advances to equity affiliates	435.0	455.4
Total assets	3,645.1	3,830.3
Middle East and India | Operating Segments
Segment Reporting Information [Line Items]
Sales	129.5	99.3	79.3
Operating income (loss)	21.1	28.0	18.5
Depreciation and amortization	26.9	25.3	20.0
Equity affiliates' income	293.9	76.4	51.9
Expenditures for long-lived assets	271.6	71.0	31.7
Investment in net assets of and advances to equity affiliates	2,143.3	409.7
Total assets	2,980.7	800.6
Corporate and other | Operating Segments
Segment Reporting Information [Line Items]
Sales	970.8	789.7	582.8
Operating income (loss)	(184.7)	(193.4)	(152.2)
Depreciation and amortization	50.1	35.2	30.2
Equity affiliates' income	3.9	6.5	10.9
Expenditures for long-lived assets	210.0	391.0	$ 226.4
Investment in net assets of and advances to equity affiliates	72.2	70.0
Total assets	$ 5,360.4	$ 7,786.4