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Contract Costs (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Capitalized Contract Cost, Net [Roll Forward] |  |
Capitalized contract costs, beginning balance | $ 68 | $ 92
Capitalized | 13 | 16
Amortization | (35) | (40)
Capitalized contract costs, ending balance | $ 46 | $ 68

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- Definition Capitalized Contract Cost, Capitalized Amount + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Capitalized Contract Cost, Net [Roll Forward] + References No definition available. + Details
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Namespace Prefix: | tdc_
Data Type: | xbrli:stringItemType
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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