Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Feb. 09, 2021	Jun. 30, 2020
Document Type	10-K
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Document Annual Report	true
Entity File Number	001-32877
Entity Registrant Name	Mastercard Incorporated
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-4172551
Entity Address, Postal Zip Code	10577
Entity Address, State or Province	NY
Entity Address, City or Town	Purchase,
Entity Address, Address Line One	2000 Purchase Street
City Area Code	914
Local Phone Number	249-2000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 261.3
Entity Central Index Key	0001141391
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Class A Common Stock
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	MA
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		985,146,914
One Point One Percent Notes Due 2022 [Member]
Title of 12(b) Security	1.1% Notes due 2022
Trading Symbol	MA22
Security Exchange Name	NYSE
Senior Notes due December 2027
Title of 12(b) Security	2.1% Notes due 2027
Trading Symbol	MA27
Security Exchange Name	NYSE
Senior Notes due December 2030
Title of 12(b) Security	2.5% Notes due 2030
Trading Symbol	MA30
Security Exchange Name	NYSE
Class B Common Stock
Entity Common Stock, Shares Outstanding		8,215,424