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2.2.0.7 false Prepaid Expenses (Detail) (USD $) 158 - Disclosure - Prepaid Expenses (Detail) true false In Millions false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 $ false 2 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 $ 5 3 ma_CustomerAndMerchantIncentives ma false debit instant Customer and merchant incentives false false false false false false false false false false false false 1 true true false false 530000000 530 false false false 2 true true false false 445000000 445 false false false xbrli:monetaryItemType monetary Customer and merchant incentives No authoritative reference available. false 6 3 us-gaap_PrepaidAdvertising us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 49000000 49 false false false 2 false true false false 56000000 56 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of amounts paid in advance for advertising airtime or print media advertising space for which the advertising associated with the payment will air or appear in print within one year or the normal operating cycle, if longer. Also includes direct-response advertising reported as assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-7 -Paragraph 49 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4 false 7 3 us-gaap_PrepaidTaxes us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 31000000 31 false false false 2 false true false false 93000000 93 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4 false 8 3 ma_PrepaidDataProcessingExpenseCurrentNoncurrent ma false debit instant Carrying amount as of the balance sheet date of current and non-current amounts paid in advance for data processing expenses. false false false false false false false false false false false false 1 false true false false 36000000 36 false false false 2 false true false false 29000000 29 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of current and non-current amounts paid in advance for data processing expenses. No authoritative reference available. false 9 3 ma_PrepaidExpenseOtherCurrentNoncurrent ma false debit instant Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be... false false false false false false false false false false false verboselabel false 1 false true false false 34000000 34 false false false 2 false true false false 18000000 18 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods. No authoritative reference available. false 10 3 us-gaap_PrepaidExpenseCurrentAndNoncurrent us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 680000000 680 false false false 2 false true false false 641000000 641 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 9 true 11 3 us-gaap_PrepaidExpenseCurrent us-gaap true debit instant No definition available. false false false false false false false false false false true negated false 1 false true false false -305000000 -305 false false false 2 false true false false -313000000 -313 false false false xbrli:monetaryItemType monetary Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4 false 12 3 us-gaap_PrepaidExpenseNoncurrent us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 true true false false 375000000 375 false false false 2 true true false false 328000000 328 false false false xbrli:monetaryItemType monetary Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 true 2 8 false Millions UnKnown UnKnown false true