2.2.0.7 false Other Assets (Detail) (USD $) 159 - Disclosure - Other Assets (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_VolumeAndSupportIncentivesAssets-CurrentNoncurrent ma false debit instant Incentive agreements entered into by the Company with financial institution customers, merchants, and other business partners... false false false false false false false false false false false verboselabel false 1 true true false false 132000000 132 false false false 2 true true false false 216000000 216 false false false xbrli:monetaryItemType monetary Incentive agreements entered into by the Company with financial institution customers, merchants, and other business partners designed to build payments volume and to increase product acceptance. No authoritative reference available. false 6 3 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap true debit instant No definition available. false false false false false false false false false false false false 1 false true false false 47000000 47 false false false 2 false true false false 35000000 35 false false false xbrli:monetaryItemType monetary Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable form a party that is affiliated with the reporting entity by means of direct or indirect ownership. No authoritative reference available. false 7 3 us-gaap_CashSurrenderValueOfLifeInsurance us-gaap true debit instant No definition available. false false false false false false false false false false false false 1 false true false false 23000000 23 false false false 2 false true false false 23000000 23 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. 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Also serves as the sum of assets not individually reported in the financial statements, or not separately disclosed in notes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 7 true 10 3 us-gaap_OtherAssetsCurrent 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 -85000000 -85 false false false 2 false true false false -126000000 -126 false false false xbrli:monetaryItemType monetary Aggregate carrying amount, as of the balance sheet date, of current assets not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). 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