0000798354 2026-06-12 2026-06-12 0000798354 us-gaap:CommonStockMember 2026-06-12 2026-06-12 0000798354 fi:A1.125SeniorNotesDueJuly2027Member 2026-06-12 2026-06-12 0000798354 fi:A1.625SeniorNotesDue2030Member 2026-06-12 2026-06-12 0000798354 fi:A3.000SeniorNotesDue2031Member 2026-06-12 2026-06-12 0000798354 fi:A4.500SeniorNotesDue2031Member 2026-06-12 2026-06-12 0000798354 fi:A2.875SeniorNotesDue2028Member 2026-06-12 2026-06-12 0000798354 fi:A3.500SeniorNotesDue2032Member 2026-06-12 2026-06-12 0000798354 fi:A4.000SeniorNotesDue2036Member 2026-06-12 2026-06-12 FISERV INC false 0000798354 8-K 2026-06-12 WI 1-38962 39-1506125 600 N. Vel R. Phillips Avenue Milwaukee WI 53203 (262) 879-5000 false false false false Common Stock, par value $0.01 per share FISV NASDAQ 1.125% Senior Notes due 2027 FISV27 NASDAQ 1.625% Senior Notes due 2030 FISV30 NASDAQ 3.000% Senior Notes due 2031 FISV31 NASDAQ 4.500% Senior Notes due 2031 FISV31A NASDAQ 2.875% Senior Notes due 2028 FISV28C NASDAQ 3.500% Senior Notes due 2032 FISV32 NASDAQ 4.000% Senior Notes due 2036 FISV36 NASDAQ false