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Contingencies and Litigation (Details) - USD ($) $ in Millions		1 Months Ended
	Feb. 03, 2020	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2025
Surety Bond
Loss Contingencies [Line Items]
Maximum exposure, undiscounted				$ 546
Letters of Credit Issued to Secured Contractual Obligations
Loss Contingencies [Line Items]
Maximum exposure, undiscounted				$ 131
Skyview Capital LLC and Continuum Global Solutions, LLC v. Conduent Business Services, LLC \| Pending Litigation \| CBS
Loss Contingencies [Line Items]
Loss contingency, damages sought	$ 23
Skyview Capital LLC and Continuum Global Solutions, LLC v. Conduent Business Services, LLC \| Pending Litigation \| Skyview
Loss Contingencies [Line Items]
Loss contingency, damages sought		$ 5
Litigation damages paid			$ 33