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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, percent (in percent)	19.00%	11.00%	18.00%	17.00%
Recognized tax benefit		$ 176	$ 142
Increase in unrecognized tax benefits, gross	$ 615		593
Increase in unrecognized tax benefits, net	$ 315		$ 192

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

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- Definition

Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 25
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482620/740-10-25-8

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-Section 25
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- Definition

Unrecognized Tax Benefits, Increase Resulting From Prior Period Tax Positions (Includes Reserve Assessment)

+ References

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- Definition

Unrecognized Tax Benefits, Increase Resulting From Prior Period Tax Positions, Net

+ References

No definition available.

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