Legal and Regulatory [Line Items] [Line Items]

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- Definition

Loss Contingency, Claims Dismissed, Number Of Years

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- Definition

Loss Contingency, Damages, Period

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- Definition

Loss Contingency, Damages Sought, Per Claim

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- Definition

Loss Contingency, Estimate Of Possible Loss, Percentage Attributable To Mastercard

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- Definition

Loss Contingency, Pending Claims, Number Of Claims Scheduled For Trial

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- Definition

Loss Contingency, Unsolicited Advertisements

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- Definition

Percent Of Settlement Reporting Entity Would Pay

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- Definition

Percentage Of Mastercard's U.S. Interchange Volume Represented By Opt-Out Merchant And Damages Class Settlements

+ References

No definition available.

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- Definition

Percentage Of Opt-Out Merchants To Terminate

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- Definition

Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
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-Section 50
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- Definition

Amount of increase (decrease) in loss contingency liability.

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- Definition

Number of claims settled.

+ References

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Number of defendants named in a legal action.

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Number of plaintiffs that have filed claims pertaining to a loss contingency.

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Number of pending claims pertaining to a loss contingency.

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Legal and Regulatory Proceedings (Details) £ in Millions, € in Billions			3 Months Ended	9 Months Ended			12 Months Ended	81 Months Ended
	Sep. 30, 2025 USD ($) merchant	Sep. 30, 2025 GBP (£)	Sep. 30, 2025 USD ($) merchant	Sep. 30, 2025 USD ($) defendant merchant fax	Sep. 30, 2025 GBP (£) defendant fax	Sep. 30, 2025 EUR (€) defendant fax	Dec. 31, 2011 plaintiff	Sep. 30, 2025 USD ($) merchant	Sep. 30, 2025 GBP (£) merchant	Dec. 31, 2024 USD ($)	Dec. 31, 2024 GBP (£)	Dec. 31, 2023 complaint	Dec. 31, 2018
Legal And Regulatory
Accrued litigation	$ 943,000,000		$ 943,000,000	$ 943,000,000				$ 943,000,000		$ 930,000,000
Unsolicited faxes \| fax				381,000	381,000	381,000
Damages sought per fax (in usd per fax)				$ 500
2022 Mastercard and Visa Proposed Collective Action Complaint in the U.K.
Legal And Regulatory
Amount of damages sought (that exceeds)	1,300,000,000	£ 1,000
Proposed U.K. Interchange Collective Action
Legal And Regulatory
Amount of damages sought (that exceeds)				$ 13,000,000,000	£ 10,000
Claims dismissed, number of years				5 years	5 years	5 years
Loss contingency accrual	268,000,000		268,000,000	$ 268,000,000				268,000,000			£ 200
Portugal Proposed Interchange Collective Action
Legal And Regulatory
Amount of damages sought (that exceeds)				$ 500,000,000		€ 0.4
Period of damages				20 years	20 years	20 years
Netherlands Interchange Collective Action
Legal And Regulatory
Amount of damages sought (that exceeds)				$ 400,000,000		€ 0.3
ATM Operators Complaint
Legal And Regulatory
Number of claims \| complaint												3
Amount of damages sought (that exceeds)				1,000,000,000
Loss contingency accrual										93,000,000
Number of plaintiffs in case \| plaintiff							13
U.S. Liability Shift Litigation
Legal And Regulatory
Amount of damages sought (that exceeds)				$ 1,000,000,000
Number of defendants \| defendant				4	4	4
Loss contingency accrual in period			80,000,000
Non-bank ATM Consumer Class Complaint
Legal And Regulatory
Loss contingency accrual	79,000,000		79,000,000	$ 79,000,000				79,000,000
Unresolved \| U.K. Merchant Lawsuit Settlement
Legal And Regulatory
Unresolved damages claims	$ 300,000,000		$ 300,000,000	$ 300,000,000				$ 300,000,000	£ 200
Event Involving Visa Parties, Member Banks and Mastercard
Legal And Regulatory
Percent of settlement Mastercard would pay							12.00%
Event Involving Member Banks and Mastercard
Legal And Regulatory
Percent of settlement Mastercard would pay							36.00%
U.S. Merchant Litigation - Class Litigation
Legal And Regulatory
Number of claims \| merchant	55		55	55				55	55
Unresolved damages claims	$ 10,000,000,000		$ 10,000,000,000	$ 10,000,000,000				$ 10,000,000,000
Percent of damages attributable to Mastercard	0.36		0.36	0.36				0.36	0.36
Number of pending claims scheduled for trial \| merchant	6		6	6				6	6
U.S. Merchant Litigation - Class Litigation \| Maximum
Legal And Regulatory
Percentage of merchant opt outs to terminate agreement													25.00%
U.S. Merchant Litigation - Class Litigation \| Minimum
Legal And Regulatory
Mastercard's U.S. interchange volume represented by opt-out merchant and damages class settlement, percentage	90.00%		90.00%	90.00%				90.00%	90.00%
U.S. Merchant Litigation - Opt-Out \| Minimum \| Settled Litigation
Legal And Regulatory
Number of claims settled \| merchant								250
U.S. Merchant Lawsuit Settlement
Legal And Regulatory
Accrued litigation	$ 512,000,000		$ 512,000,000	$ 512,000,000				$ 512,000,000		$ 559,000,000