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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Schedule of Restricted Cash and Cash Equivalents

The reconciliation between Cash and cash equivalents in the consolidated balance sheets and Cash, cash equivalents and restricted cash per the consolidated statements of cash flows is as follows (in millions):

			December 31,
			2025						2024
Cash and cash equivalents on the consolidated balance sheets			$	599					$	834
Merchant float from discontinued operations included in current assets held for sale (1)			—						1,074
Cash from discontinued operations included in current assets held for sale			—						38
Total Cash, cash equivalents and restricted cash per the consolidated statements of cash flows			$	599					$	1,946

(1)Merchant float funds are considered restricted cash.

Schedule of Cash and Cash Equivalents

The reconciliation between Cash and cash equivalents in the consolidated balance sheets and Cash, cash equivalents and restricted cash per the consolidated statements of cash flows is as follows (in millions):

			December 31,
			2025						2024
Cash and cash equivalents on the consolidated balance sheets			$	599					$	834
Merchant float from discontinued operations included in current assets held for sale (1)			—						1,074
Cash from discontinued operations included in current assets held for sale			—						38
Total Cash, cash equivalents and restricted cash per the consolidated statements of cash flows			$	599					$	1,946

(1)Merchant float funds are considered restricted cash.

Schedule of Settlement Assets and Payables

The principal components of the Company's settlement assets and payables on the consolidated balance sheets are as follows (in millions):

						December 31,
						2025						2024
Settlement assets
Settlement deposits						$	368					$	353
Settlement receivables						147						126
Total Settlement assets						$	515					$	479
Settlement payables						$	549					$	500

Schedule of Net Earnings Per Share

Net earnings (loss) and earnings (loss) per share for the years ended December 31, 2025, 2024 and 2023, are as follows (in millions, except per share data):

			Year ended December 31,
			2025						2024						2023
Net earnings (loss) from continuing operations attributable to FIS			$	382					$	787					$	502
Net earnings (loss) from discontinued operations attributable to FIS			—						663						(7,157)
Net earnings (loss) attributable to FIS			$	382					$	1,450					$	(6,655)
Weighted average shares outstanding-basic			523						553						591
Plus: Common stock equivalent shares			2						2						—
Weighted average shares outstanding-diluted			525						555						591
Net earnings (loss) per share-basic from continuing operations attributable to FIS			$	0.73					$	1.42					$	0.85
Net earnings (loss) per share-basic from discontinued operations attributable to FIS			—						1.20						(12.11)
Net earnings (loss) per share-basic attributable to FIS			$	0.73					$	2.62					$	(11.26)
Net earnings (loss) per share-diluted from continuing operations attributable to FIS			$	0.73					$	1.42					$	0.85
Net earnings (loss) per share-diluted from discontinued operations attributable to FIS			—						1.19						(12.11)
Net earnings (loss) per share-diluted attributable to FIS			$	0.73					$	2.61					$	(11.26)

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