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Employee Benefit Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Retirement Benefits [Abstract] |  |  |
Post employment benefit plan contributions by employer | $ 10 | $ 21 | $ 6

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- Definition defined contributions plan contributions + References No definition available. + Details
Name: | cndt_DefinedContributionsPlanContributions
Namespace Prefix: | cndt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration