Legal and Regulatory [Line Items] [Line Items]

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- Definition

Loss Contingency, Claims Dismissed, Number Of Years

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Loss Contingency, Damages Sought, Complaint Period

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- Definition

Loss Contingency, Damages Sought, Per Claim

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- Definition

Loss Contingency, Pending Claims, Groups Of Opt-Out Merchants, Number

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- Definition

Loss Contingency, Pending Claims, Individual Opt-Out Merchants, Number

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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

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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
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- Definition

Number of claims settled.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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Legal and Regulatory Proceedings (Details) £ in Millions, € in Billions			12 Months Ended						81 Months Ended
	Dec. 31, 2025 USD ($) merchant claimant	Dec. 31, 2025 GBP (£)	Dec. 31, 2025 USD ($) merchant claimant fax	Dec. 31, 2025 GBP (£) fax	Dec. 31, 2025 EUR (€) fax	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) complaint	Dec. 31, 2011 plaintiff	Sep. 30, 2025 merchant	Dec. 31, 2025 GBP (£) merchant claimant	Dec. 31, 2018
Legal And Regulatory
Payment toward legal settlements			$ 647,000,000			$ 496,000,000	$ 929,000,000
Pending claims, number of opt-out merchants \| merchant	2		2							2
Accrued litigation	$ 800,000,000		$ 800,000,000			930,000,000
Number of unsolicited advertisements \| fax			381,000	381,000	381,000
Damages sought per claim			$ 500
2022 Mastercard and Visa Proposed Collective Action Complaint in the U.K.
Legal And Regulatory
Amount of damages sought (approximately)	1,300,000,000	£ 1,000
Proposed U.K. Interchange Collective Action
Legal And Regulatory
Payment toward legal settlements			263,000,000	£ 200
Amount of damages sought (approximately)			$ 13,000,000,000	£ 10,000
Loss contingency, claims dismissed, number of years			5 years	5 years	5 years
Portugal Proposed Interchange Collective Action
Legal And Regulatory
Amount of damages sought (approximately)			$ 500,000,000		€ 0.4
Complaint period			20 years	20 years	20 years
Netherlands Proposed Interchange Collective Action
Legal And Regulatory
Amount of damages sought (approximately)			$ 400,000,000		€ 0.3
ATM Operators Complaint
Legal And Regulatory
Payment toward legal settlements			93,000,000
Amount of damages sought (approximately)			1,000,000,000
Number of plaintiffs in case \| plaintiff								13
Number of pending claims \| complaint							3
Loss contingency accrual	$ 79,000,000		79,000,000
U.S. Liability Shift Litigation
Legal And Regulatory
Amount of damages sought (approximately)			$ 1,000,000,000
Number of pending claims \| claimant	4		4							4
Loss contingency accrual	$ 80,000,000		$ 80,000,000
Pending Litigation \| U.K. Merchant Lawsuit Settlement
Legal And Regulatory
Unresolved damages claims remaining	$ 400,000,000		$ 400,000,000							£ 300
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
Pending claims, groups of opt-out merchants \| merchant	7		7							7
Amount of damages sought (approximately)			$ 1,000,000,000
Number of pending claims scheduled for trial \| merchant	6		6							6
U.S. Merchant Litigation - Class Litigation \| Maximum
Legal And Regulatory
Percentage of opted out merchants to terminate											25.00%
U.S. Merchant Litigation - Class Litigation \| Minimum
Legal And Regulatory
Percentage of Mastercard's U.S. interchange volume represented	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	$ 637,000,000		$ 637,000,000			$ 559,000,000