Business Segment Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Segment Reporting Information [Line Items]
Sales	$ 3,174.7	$ 2,994.2
Operating income (loss)	652.0	523.0
Depreciation and amortization	321.5	332.3
Equity affiliates' income	110.0	147.8
Total assets	28,278.3		$ 27,192.6
Operating Segments
Segment Reporting Information [Line Items]
Sales	3,174.7	2,994.2
Operating income (loss)	652.0	523.0
Depreciation and amortization	321.5	332.3
Equity affiliates' income	110.0	147.8
Total assets	28,278.3		27,192.6
Americas | Operating Segments
Segment Reporting Information [Line Items]
Sales	1,384.2	1,224.1
Operating income (loss)	343.0	267.2
Depreciation and amortization	156.0	155.3
Equity affiliates' income	16.4	34.2
Total assets	8,515.0		8,237.7
Asia | Operating Segments
Segment Reporting Information [Line Items]
Sales	777.8	780.4
Operating income (loss)	235.9	221.1
Depreciation and amortization	101.9	110.8
Equity affiliates' income	7.4	6.6
Total assets	7,439.3		6,968.7
Europe | Operating Segments
Segment Reporting Information [Line Items]
Sales	791.9	744.2
Operating income (loss)	145.8	99.2
Depreciation and amortization	44.3	49.8
Equity affiliates' income	17.7	13.9
Total assets	3,908.1		3,645.1
Middle East and India | Operating Segments
Segment Reporting Information [Line Items]
Sales	41.4	23.7
Operating income (loss)	6.7	4.8
Depreciation and amortization	6.6	6.1
Equity affiliates' income	64.1	92.3
Total assets	3,154.2		2,980.7
Corporate and other | Operating Segments
Segment Reporting Information [Line Items]
Sales	179.4	221.8
Operating income (loss)	(79.4)	(69.3)
Depreciation and amortization	12.7	10.3
Equity affiliates' income	4.4	$ 0.8
Total assets	$ 5,261.7		$ 5,360.4