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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2023
Income Tax Disclosure [Abstract]  
U.S. and Non-U.S. Income Before Income Tax
The Company’s income before income taxes by fiscal year consisted of the following:
For the Years Ended September 30,
202320222021
 (in millions)
U.S.$13,339 $11,051 $11,002 
Non-U.S.7,698 7,085 5,061 
Total income before income taxes
$21,037 $18,136 $16,063 
Comprehensive Income Tax (Expense) Benefit Components Table
Income tax provision by fiscal year consisted of the following:
For the Years Ended September 30,
202320222021
 (in millions)
Current:
U.S. federal$2,630 $2,166 $1,943 
State and local293 104 69 
Non-U.S.1,324 1,245 869 
Total current taxes4,247 3,515 2,881 
Deferred:
U.S. federal(339)(231)(57)
State and local(1)(77)(28)
Non-U.S.(143)(28)956 
Total deferred taxes(483)(336)871 
Total income tax provision$3,764 $3,179 $3,752 
Components of Deferred Tax Assets and Liabilities
The following table presents the components of deferred tax assets and liabilities:
September 30,
20232022
 (in millions)
Deferred Tax Assets:
Accrued compensation and benefits$212 $172 
Accrued litigation obligation365 331 
Client incentives630 442 
Net operating loss carryforwards232 117 
Comprehensive loss72 21 
Federal benefit of state taxes125 133 
Other66 71 
Valuation allowance(149)(120)
Deferred tax assets1,553 1,167 
Deferred Tax Liabilities:
Property, equipment and technology, net(350)(450)
Intangible assets(6,063)(5,788)
Unrealized gains on equity securities(103)(124)
Foreign taxes(25)(50)
Deferred tax liabilities(6,541)(6,412)
Net deferred tax liabilities$(4,988)$(5,245)
Reconciliation of the US Statutory Federal Tax Rate
The following table presents a reconciliation of the income tax provision to the amount of income tax determined by applying the U.S. federal statutory income tax rate to income before income taxes:
 For the Years Ended September 30,
 202320222021
 (in millions, except percentages)
U.S. federal income tax at statutory rate$4,418 21 %$3,809 21 %$3,373 21 %
State income taxes, net of federal benefit245 1 %216 %222 %
Non-U.S. tax effect, net of federal benefit(758)(3 %)(588)(3 %)(505)(3 %)
Remeasurement of deferred tax balances  %— — %1,007 %
Reassessment of an uncertain tax position
(142)(1 %)— — %— — %
Conclusion of audits  %— — %(255)(2 %)
State tax apportionment position  %(176)(1 %)— — %
Other, net1  %(82)— %(90)— %
Income tax provision$3,764 18 %$3,179 18 %$3,752 23 %
Unrecognized Tax Benefits Reconciliation, Table
The following table presents a reconciliation of beginning and ending unrecognized tax benefits by fiscal year: 
202320222021
 (in millions)
Balance as of beginning of period
$2,683 $2,488 $2,579 
Increase in unrecognized tax benefits related to prior years
515 10 34 
Decrease in unrecognized tax benefits related to prior years
(190)(143)(386)
Increase in unrecognized tax benefits related to current year
510 350 326 
Decrease related to settlements with taxing authorities
(17)(19)(63)
Reduction related to lapsing statute of limitations
(4)(3)(2)
Balance as of end of period
$3,497 $2,683 $2,488