Business Segment Information (Tables)

3 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summary by Business Segment

	Americas	Asia	Europe	Middle East and India	Corporate and other	Total
Three Months Ended 31 December 2025
Sales(A)	$1,341.7	$831.5	$782.0	$30.3	$117.0	$3,102.5
Cost of sales	(886.6)	(573.2)	(491.7)	(19.9)	(136.1)	(2,107.5)
Selling and administrative expense	(55.2)	(28.0)	(67.0)	(5.0)	(73.5)	(228.7)
Other segment items(B)	3.9	2.0	0.2	0.4	(16.3)	(9.8)
Operating income (loss)(C)	403.8	232.3	223.5	5.8	(108.9)	756.5
Other segment information:
Depreciation and amortization	171.9	112.7	69.8	6.2	10.1	370.7
Equity affiliates' income (loss)	51.7	13.8	23.4	84.5	(1.2)	172.2
Expenditures for long-lived assets	503.7	103.6	209.1	405.3	29.5	1,251.2
Three Months Ended 31 December 2024
Sales(A)	$1,287.6	$817.1	$697.2	$32.8	$96.8	$2,931.5
Cost of sales	(855.1)	(572.1)	(449.4)	(25.7)	(114.2)	(2,016.5)
Selling and administrative expense	(54.4)	(31.5)	(61.9)	(7.8)	(86.8)	(242.4)
Other segment items(B)	10.1	2.9	0.6	0.1	(12.8)	0.9
Operating income (loss)(C)	388.2	216.4	186.5	(0.6)	(117.0)	673.5
Other segment information:
Depreciation and amortization	173.4	122.9	54.5	6.5	9.5	366.8
Equity affiliates' income	35.1	10.3	18.2	85.0	2.0	150.6
Expenditures for long-lived assets	690.7	99.9	230.6	1,040.4	56.0	2,117.6
As of 31 December 2025
Investment in net assets of and advances to equity affiliates	$600.3	$338.8	$671.6	$3,714.6	$114.8	$5,440.1
Total assets	12,447.2	6,766.2	7,086.5	11,313.5	3,627.3	41,240.7
As of 30 September 2025
Investment in net assets of and advances to equity affiliates	$555.2	$331.3	$649.9	$3,713.2	$116.5	$5,366.1
Total assets	12,058.7	6,712.2	6,916.8	10,919.4	4,452.4	41,059.5

(A)Sales relate to external customers only. All intersegment sales are eliminated in consolidation.

(B)For the regional segments, other segment items primarily include impacts from transactions not directly related to our principal earnings activities, such as technology and royalty income and gains and losses on asset sales. For the Corporate and other segment, other segment items primarily include research and development expense and the net impact of gains and losses on foreign currency transactions.

(C)Operating income (loss) for our reportable segments does not include gains or losses that management does not consider to be indicative of underlying business performance, such as charges related to business and asset actions. Refer below for a reconciliation of total segment operating income to consolidated results.

Reconciliation of Segments to Consolidated Operating Income

The table below reconciles total segment operating income to income before taxes as reflected on our consolidated income statements:

	Three Months Ended
	31 December
	2025	2024
Total Segment Operating Income	$756.5	$673.5
Business and asset actions	(22.0)	—
Shareholder activism-related costs	—	(29.9)
Consolidated Operating Income	$734.5	$643.6
Equity affiliates' income	172.2	150.6
Interest expense	54.5	42.6
Other non-operating income (expense), net	(1.4)	38.9
Income Before Taxes	$850.8	$790.5