0000798354 2019-10-03 2019-10-03 0000798354 fisv:SeniorNotesDue2023Member 2019-10-03 2019-10-03 0000798354 fisv:SeniorNotesDue2025Member 2019-10-03 2019-10-03 0000798354 us-gaap:CommonStockMember 2019-10-03 2019-10-03 0000798354 fisv:SeniorNotesDue2031Member 2019-10-03 2019-10-03 0000798354 fisv:SeniorNotesDue2027Member 2019-10-03 2019-10-03 0000798354 fisv:SeniorNotesDue2030Member 2019-10-03 2019-10-03 false 0000798354 8-K 2019-10-03 Fiserv, Inc. WI 1-38962 39-1506125 255 Fiserv Drive Brookfield WI 53045 262 879-5000 false false false false Common Stock, par value $0.01 per share FISV NASDAQ 0.375% Senior Notes due 2023 FISV23 NASDAQ 1.125% Senior Notes due 2027 FISV27 NASDAQ 1.625% Senior Notes due 2030 FISV30 NASDAQ 2.250% Senior Notes due 2025 FISV25 NASDAQ 3.000% Senior Notes due 2031 FISV31 NASDAQ false