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Employee Stock-based Compensation Plans - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended
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Mar. 01, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Mar. 01, 2013 Long-Term Strategic PBRSUs | Jan. 31, 2013 Employee Stock Purchase Program | Dec. 31, 2013 Employee Stock Purchase Program | Dec. 31, 2012 Employee Stock Purchase Program | Dec. 31, 2011 Employee Stock Purchase Program | Dec. 31, 2013 Stock Option | Dec. 31, 2012 Stock Option | Dec. 31, 2011 Stock Option | Dec. 31, 2013 Restricted Stock | Dec. 31, 2012 Restricted Stock | Dec. 31, 2011 Restricted Stock | Dec. 31, 2013 Restricted Stock Units With Market Based Performance Criteria | Dec. 31, 2012 Restricted Stock Units With Market Based Performance Criteria | Dec. 31, 2013 Service-Based Awards Minimum | Dec. 31, 2013 Service-Based Awards Maximum | Dec. 31, 2013 Performance Based Awards Minimum | Dec. 31, 2013 Performance Based Awards Maximum | Dec. 31, 2013 Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized to be issued under the Teradata SIP |  | 16,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option, term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years
Vesting period(in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 4 years | 1 year | 4 years | 4 years
Weighted-average fair value of options granted for Teradata equity awards |  |  |  |  |  |  |  |  |  | $ 18.02 | $ 22.31 | $ 18.12 |  |  |  |  |  |  |  |  |  |
Risk-free interest rate within the contractual life of the option |  |  |  |  |  |  |  |  |  | The risk-free interest rate for periods within the contractual life of the option is based on an average of the five-year and seven-year |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  |  |  |  |  |  |  | $ 19,000,000 | $ 113,000,000 | $ 38,000,000 |  |  |  |  |  |  |  |  |  |
Cash received by the Company from option exercises under all share-based payment arrangements |  |  |  |  |  |  |  |  |  | 9,000,000 | 43,000,000 | 16,000,000 |  |  |  |  |  |  |  |  |  |
Tax benefit realized from stock options exercises |  |  |  |  |  |  |  |  |  | 6,000,000 | 38,000,000 | 14,000,000 |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation cost related to unvested stock grants |  |  |  |  |  |  |  |  |  | 36,000,000 |  |  | 68,000,000 |  |  |  |  |  |  |  |  |
Cost expected to be recognized over a weighted-average period (in years) |  |  |  |  |  |  |  |  |  | 3 years 1 month 6 days |  |  | 2 years 4 months 24 days |  |  |  |  |  |  |  |  |
Weighted-average fair value of restricted stock unit awards granted |  | $ 48.24 | $ 60.71 | $ 45.19 |  |  |  |  |  |  |  |  |  |  |  | $ 26.78 |  |  |  |  |  |
Total fair value of shares vested |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 | 15,000,000 | 11,000,000 |  |  |  |  |  |  |
Restricted stock unit awards granted |  | 995,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |
Number of types of market based performance awards | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance based restricted units percentage of total units allocated | 70.00% |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense for restricted stock awards |  | 32,000,000 | 28,000,000 | 21,000,000 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Employee stock purchase program discount from average market price |  |  |  |  |  | 15.00% |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of authorized payroll deductions for common stock purchases by employees |  |  |  |  |  |  | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized to be issued under the Employee Stock Purchase Program |  |  |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining shares authorized to be issued under the Employee Stock Purchase Program |  |  |  |  |  |  | 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee purchased shares |  |  |  |  |  |  | 400,000 | 200,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Employee purchased shares estimated cost |  |  |  |  |  |  | $ 20,000,000 | $ 12,000,000 | $ 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Discount rate from fair value on offering date that participants pay for shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock. + References No definition available. + Details
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- Definition Number of shares issued during the period as a result of an employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Aggregate change in value for stock issued during the period as a result of employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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