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Supplemental Pro Forma Information (Detail) (Open Solutions Inc, USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Open Solutions Inc
 
Business Acquisition [Line Items]  
Total revenue $ 4,764us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= fisv_OpenSolutionsIncMember
Income from continuing operations 602us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
/ us-gaap_BusinessAcquisitionAxis
= fisv_OpenSolutionsIncMember
Net income $ 621us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= fisv_OpenSolutionsIncMember
Net income per share - basic $ 2.29us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= fisv_OpenSolutionsIncMember
Net income per share - diluted $ 2.26us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= fisv_OpenSolutionsIncMember