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Goodwill and Acquired Intangible Assets Goodwill by Operating Segment (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Goodwill |
December 31, 2013 | $ 946 us-gaap_Goodwill
Additions | 30 us-gaap_GoodwillAcquiredDuringPeriod
Currency Translation Adjustments | (28)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments
December 31, 2014 | 948 us-gaap_Goodwill
Americas |
Goodwill |
December 31, 2013 | 626 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
Additions | 30 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
Currency Translation Adjustments | (2)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
December 31, 2014 | 654 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
International |
Goodwill |
December 31, 2013 | 320 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember
Additions | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember
Currency Translation Adjustments | (26)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember
December 31, 2014 | $ 294 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdc_InternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdc_NorthAmericaAndLatinAmericaRegionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |