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Redeemable Noncontrolling Interest - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 noncontrolling_interest
Noncontrolling Interest [Line Items]
Noncontrolling interest, change in redemption value		$ 66	$ 66
Forecast
Noncontrolling Interest [Line Items]
Noncontrolling interest, change in redemption value	$ 90
First Data Joint Venture
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owner				1.00%
First Data
Noncontrolling Interest [Line Items]
Number of redeemable noncontrolling interests | noncontrolling_interest				1

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Number Of Redeemable Noncontrolling Interests

+ References

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- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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