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Business Segment Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]    
Goodwill $ 5,204us-gaap_Goodwill $ 5,209us-gaap_Goodwill
Payments [Member]    
Segment Reporting Information [Line Items]    
Goodwill 3,400us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= fisv_PaymentsAndIndustryProductsSegmentMember		 3,400us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= fisv_PaymentsAndIndustryProductsSegmentMember
Financial [Member]    
Segment Reporting Information [Line Items]    
Goodwill $ 1,800us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= fisv_FinancialInstitutionServicesSegmentMember		 $ 1,800us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= fisv_FinancialInstitutionServicesSegmentMember