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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Schedule of Income of U.S. and Foreign Operations Before Taxes
The table below summarizes income from U.S. and foreign operations before taxes:
202520242023
United States income (Loss)($1,911.8)$2,602.5 $1,050.5 
Foreign income823.4 1,571.0 1,227.6 
Equity affiliates' income647.7 647.7 604.3 
Income (Loss) From Continuing Operations Before Taxes($440.7)$4,821.2 $2,882.4 
Schedule of Components of Income Tax Expense (Benefit)
The table below details the components of our income tax provision:
202520242023
Current Tax Provision
Federal$38.0 $550.3 $167.6 
State                5.6 109.2 41.0 
Foreign416.9 354.7 367.3 
Total Current Tax Provision$460.5 $1,014.2 $575.9 
Deferred Tax (Benefit) Provision
Federal(497.4)(97.8)(12.5)
State(95.0)(15.0)(5.8)
Foreign37.6 43.5 (6.4)
Total Deferred Tax (Benefit) Provision(554.8)(69.3)(24.7)
Total Income Tax (Benefit) Provision($94.3)$944.9 $551.2 
Schedule of Effective Income Tax Rate Reconciliation A reconciliation of the differences between the United States federal statutory tax rate and the effective tax rate is provided below:
(Percent of income before taxes)202520242023
U.S. federal statutory tax rate21.0%21.0%21.0%
State taxes, net of federal benefit16.11.51.0
Income from equity affiliates26.6(2.4)(3.8)
Foreign tax differentials5.60.30.7
Tax on foreign repatriated earnings0.5
Business and asset actions(49.0)0.7
Other1.1(0.8)(1.0)
Effective Tax Rate21.4%19.6%19.1%
Schedule of Components of Deferred Tax Assets and Liabilities
The significant components of deferred tax assets and liabilities are as follows:
30 September20252024
Gross Deferred Tax Assets
Basis difference in foreign subsidiaries$182.3 $— 
Revenue recognition148.5 100.3 
Tax loss carryforwards137.5 132.2 
Reserves and accruals115.6 83.1 
Currency losses60.3 12.6 
Retirement benefits and compensation accruals59.2 62.5 
Tax credits and other tax carryforwards49.9 45.5 
Other76.2 44.6 
Valuation allowance(506.3)(158.4)
Deferred Tax Assets$323.2 $322.4 
Gross Deferred Tax Liabilities
Plant and equipment$623.5 $1,205.8 
Unremitted earnings of foreign entities125.4 103.4 
Partnership and other investments18.1 19.2 
Intangible assets5.2 17.3 
Other2.7 8.8 
Deferred Tax Liabilities$774.9 $1,354.5 
Net Deferred Income Tax Liability$451.7 $1,032.1 
Deferred tax assets and liabilities are included within the consolidated balance sheets as follows:
20252024
Deferred Tax Assets
Other noncurrent assets$127.9 $127.8 
Deferred Tax Liabilities
Deferred income taxes579.6 1,159.9 
Net Deferred Income Tax Liability$451.7 $1,032.1 
Schedule of Deferred Tax Assets for Certain Tax Credits
As of 30 September 2025, we had the following deferred tax assets for certain tax credits:
JurisdictionGross Tax AssetExpiration Period
U.S. State$1.8 2028 - 2039
U.S. Federal27.6 2030 - 2034
Credits in Foreign Jurisdictions16.2 Indefinite
Summary of Tax Credit Carryforwards
As of 30 September 2025, we had the following loss carryforwards:
JurisdictionGross Loss CarryforwardExpiration Period
U.S. State Net Operating Loss$207.2 2027 - 2045
Foreign Net Operating Loss371.1 2026 - 2035; Indefinite
Foreign Capital Loss208.4 Indefinite
Schedule of Reconciliation of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of unrecognized tax benefits, which excludes interest and penalties, is as follows:
202520242023
Unrecognized tax benefits balance at beginning of year$101.0 $96.5 $103.5 
Additions for tax positions of the current year21.2 14.6 10.9 
Additions for tax positions of prior years92.6 1.4 1.2 
Reductions for tax positions of prior years(0.6)(0.3)(6.0)
Settlements (3.7)(3.9)
Statute of limitations expiration(20.0)(9.9)(10.6)
Foreign currency translation0.6 2.4 1.4 
Unrecognized tax benefits balance at end of year$194.8 $101.0 $96.5 
Schedule of Income Tax Examinations
We generally remain subject to examination in the following major tax jurisdictions for the years indicated below:
Major Tax JurisdictionOpen Tax Years
North America
United States – Federal
2022 - 2025
United States – State
2015 - 2025
Canada
2018 - 2025
Europe
France
2022 - 2025
Netherlands
2020 - 2025
Spain
2017 - 2025
United Kingdom
2021 - 2025
Middle East
Saudi Arabia
2020 - 2025
Asia
China
2011 - 2025
South Korea
2015 - 2025
Taiwan
2020 - 2025
Latin America
Chile
2020 - 2025