Legal and Regulatory Proceedings (Details) £ in Millions, € in Billions		1 Months Ended	9 Months Ended			12 Months Ended	69 Months Ended
	Sep. 30, 2024 USD ($) complaint merchant	Dec. 31, 2023 GBP (£)	Sep. 30, 2024 USD ($) defendant fax complaint merchant	Sep. 30, 2024 GBP (£) defendant fax	Sep. 30, 2024 EUR (€) defendant fax	Dec. 31, 2011 plaintiff	Sep. 30, 2024 USD ($) merchant complaint	Oct. 31, 2024 USD ($) merchant	Sep. 30, 2024 GBP (£) complaint merchant	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2019 complaint	Dec. 31, 2018
Legal And Regulatory
Accrued litigation	$ 665,000,000		$ 665,000,000				$ 665,000,000				$ 723,000,000
Unsolicited faxes | fax			381,000	381,000	381,000
Damages sought per fax (in usd per fax)			$ 500
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 pending claims | merchant	65		65				65		65
U.S. Merchant Litigation - Class Litigation | Subsequent Event
Legal And Regulatory
Unresolved damages claims								$ 12,000,000,000
Percent of damages attributable to Mastercard								0.36
Number of pending claims scheduled for trial | merchant								6
U.S. Merchant Lawsuit Settlement
Legal And Regulatory
Accrued litigation	$ 572,000,000		$ 572,000,000				$ 572,000,000				$ 596,000,000
Maximum | U.S. Merchant Litigation - Class Litigation
Legal And Regulatory
Percentage of merchant opt outs to terminate agreement													25.00%
Minimum | U.S. Merchant Litigation - Class Litigation
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%
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
ATM Operators Complaint
Legal And Regulatory
Number of pending claims | complaint	2		2				2		2			3
Amount of damages sought (that exceeds)	$ 1,000,000,000
Number of plaintiffs in case | plaintiff						13
Loss contingency accrual										$ 93,000,000
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
Portugal Proposed Interchange Collective Action
Legal And Regulatory
Amount of damages sought (that exceeds)			$ 400,000,000		€ 0.4
Period of damages			20 years	20 years	20 years
Unresolved | U.K. Merchant Lawsuit Settlement
Legal And Regulatory
Unresolved damages claims	$ 400,000,000		$ 400,000,000				$ 400,000,000		£ 300
Settled Litigation | Minimum | U.S. Merchant Litigation - Opt-Out
Legal And Regulatory
Number of claims settled | merchant							250