v3.26.1
Segment Information - Schedule of Financial Information for the Company's Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting        
Revenue $ 3,377 $ 2,616 $ 6,671 $ 5,148
Direct cost of revenue (2,203) (1,664) (4,390) (3,317)
Asset impairments 0 0 (104) (2)
Other income (expense), net (12) (159) 23 (195)
(Provision) benefit for income taxes (63) (10) (170) (93)
Equity method investment earnings (loss), net of tax 0 598 (2,214) 669
Net earnings attributable to noncontrolling interest (1) (1) (1) (1)
Net earnings (loss) attributable to FIS 231 (470) 2,598 (393)
Capital expenditures 301 238 725 548
Depreciation and amortization (including purchase accounting amortization) 665 481 1,294 936
Software and Hardware Purchases or Lease Obligations        
Segment Reporting        
Capital expenditures 45 20 208 97
Banking Solutions        
Segment Reporting        
Capital expenditures 210 142 483 324
Depreciation and amortization (including purchase accounting amortization) 138 165 500 327
Capital Market Solutions        
Segment Reporting        
Capital expenditures 81 89 225 203
Depreciation and amortization (including purchase accounting amortization) 108 105 234 208
Corporate and Other        
Segment Reporting        
Capital expenditures 10 7 17 21
Depreciation and amortization (including purchase accounting amortization) 419 211 560 401
Operating Segments        
Segment Reporting        
Revenue 3,377 2,616 6,671 5,148
Direct cost of revenue (484) (341) (960) (671)
Net personnel costs (1,017) (918) (2,094) (1,876)
Infrastructure costs (334) (241) (659) (476)
Allocated costs 0 0 0 0
Other costs (133) (75) (245) (126)
Adjusted EBITDA 1,409 1,041 2,713 1,999
Operating Segments | Banking Solutions        
Segment Reporting        
Revenue 2,483 1,720 4,857 3,352
Direct cost of revenue (430) (276) (837) (535)
Net personnel costs (499) (406) (1,023) (823)
Infrastructure costs (128) (62) (255) (122)
Allocated costs (203) (171) (412) (359)
Other costs (87) (49) (156) (92)
Adjusted EBITDA 1,136 756 2,174 1,421
Operating Segments | Capital Market Solutions        
Segment Reporting        
Revenue 810 783 1,633 1,571
Direct cost of revenue (67) (49) (119) (102)
Net personnel costs (180) (195) (368) (399)
Infrastructure costs (10) (25) (32) (47)
Allocated costs (121) (98) (246) (205)
Other costs (12) (7) (23) (16)
Adjusted EBITDA 420 409 845 802
Operating Segments | Corporate and Other        
Segment Reporting        
Revenue 84 113 181 225
Direct cost of revenue 13 (16) (4) (34)
Net personnel costs (338) (317) (703) (654)
Infrastructure costs (196) (154) (372) (307)
Allocated costs 324 269 658 564
Other costs (34) (19) (66) (18)
Adjusted EBITDA (147) (124) (306) (224)
Segment Reconciling Items        
Segment Reporting        
Adjusted EBITDA 1,409 1,041 2,713 1,999
Depreciation and amortization (344) (309) (683) (596)
Purchase accounting amortization (321) (172) (611) (340)
Acquisition, integration and other costs (237) (152) (386) (306)
Asset impairments     (104) (2)
Interest expense, net (200) (110) (397) (190)
Other income (expense), net (12) (159) 23 (195)
(Provision) benefit for income taxes $ (63) $ (10) $ (170) $ (93)