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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Significant Components of Company's Income Tax Provision from Continuing Operations
The more significant components of the Company’s income tax provision from continuing operations are as follows (in millions):
 Year Ended September 30,
 202120202019
Tax expense at Ireland statutory rate$327 $113 $132 
U.S. state income tax, net of federal benefit34 15 
Income subject to the U.S. federal tax rate
(92)(110)
Income subject to rates different than the statutory rate30 99 38 
Reserve and valuation allowance adjustments66 (70)(284)
Intercompany intellectual property transfer417 — — 
Restructuring and impairment costs(9)50 (24)
Income tax provision (benefit)$868 $108 $(233)
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):
Year Ended September 30,
202120202019
Beginning balance, October 1$2,528 $2,451 $2,358 
Additions for tax positions related to the current year240 128 433 
Additions for tax positions of prior years33 129 347 
Reductions for tax positions of prior years(6)(27)(88)
Settlements with taxing authorities(24)(54)— 
Statute closings and audit resolutions(45)(99)(599)
Ending balance, September 30$2,726 $2,528 $2,451 
Tax Jurisdictions and Years Currently under Audit Exam
In the U.S., fiscal years 2017 through 2018 are currently under exam by the Internal Revenue Service (“IRS”) for certain legal entities. Additionally, the Company is currently under exam in the following major non-U.S. jurisdictions for continuing operations:
 
Tax JurisdictionTax Years Covered
Belgium
2015 - 2020
China
2017 - 2019
Germany
2007 - 2018
Luxembourg
2017 - 2018
Mexico
2015 - 2020
United Kingdom
2014 - 2015, 2017 - 2018
Components of Provision for Income Taxes on Continuing Operations
Selected income tax data related to continuing operations were as follows (in millions):
 Year Ended September 30,
 202120202019
Components of income (loss) from continuing operations before income taxes:
U.S. $543 $(385)$(259)
Non-U.S.2,071 1,288 1,315 
Income from continuing operations before income taxes$2,614 $903 $1,056 
Components of the provision (benefit) for income taxes:
Current
U.S. federal$459 $309 $(1,025)
U.S. state108 72 (33)
Non-U.S.265 264 213 
832 645 (845)
Deferred
U.S. federal(7)(382)412 
U.S. state46 (43)84 
Non-U.S.(3)(112)116 
36 (537)612 
Income tax provision (benefit)$868 $108 $(233)
Income taxes paid (refunded)$504 $(386)$377 
Deferred Taxes Classified in Consolidated Statements of Financial Position
Deferred taxes were classified in the consolidated statements of financial position as follows (in millions):
 September 30,
 20212020
Other noncurrent assets$755 $862 
Other noncurrent liabilities(443)(385)
Net deferred tax asset$312 $477 
Temporary Differences and Carryforwards in Deferred Tax Assets and Liabilities
Temporary differences and carryforwards which gave rise to deferred tax assets and liabilities included (in millions):
 
 September 30,
 20212020
Deferred tax assets
Accrued expenses and reserves$407 $474 
Employee and retiree benefits148 286 
Property, plant and equipment369 182 
Net operating loss and other credit carryforwards6,293 6,306 
Research and development42 112 
Operating lease liabilities334 304 
Other, net28 99 
7,621 7,763 
Valuation allowances(5,853)(5,518)
1,768 2,245 
Deferred tax liabilities
Subsidiaries, joint ventures and partnerships346 730 
Intangible assets776 734 
Operating lease right-of-use assets334 304 
1,456 1,768 
Net deferred tax asset$312 $477