Capital Lease Obligation At Issuance

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Namespace Prefix:	ncr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Amont Due at Maturity Date

+ Details

Name:	ncr_DebtInstrumentAmontDueAtMaturityDate
Namespace Prefix:	ncr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument Covenant Consolidated Leverage Ratio

+ Details

Name:	ncr_DebtInstrumentCovenantConsolidatedLeverageRatio
Namespace Prefix:	ncr
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant Interest Coverage Ratio

+ Details

Name:	ncr_DebtInstrumentCovenantInterestCoverageRatio
Namespace Prefix:	ncr
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Margin for Base Rate Loans

+ Details

Name:	ncr_DebtInstrumentMarginForBaseRateLoans
Namespace Prefix:	ncr
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Georgia Development Authority IRB Rate

+ Details

Name:	ncr_GeorgiaDevelopmentAuthorityIrbRate
Namespace Prefix:	ncr
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Interest coverage ratio determination period

+ Details

Name:	ncr_InterestCoverageRatioDeterminationPeriod
Namespace Prefix:	ncr
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Reduction in Borrowing Capacity From Usage of Letters of Credit

+ Details

Name:	ncr_LineOfCreditFacilityReductionInBorrowingCapacityFromUsageOfLettersOfCredit
Namespace Prefix:	ncr
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum Incremental Borrowing Per Secured Credit Facility

+ Details

Name:	ncr_MaximumIncrementalBorrowingPerSecuredCreditFacility
Namespace Prefix:	ncr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Secured Credit Facility Maximum Borrowing Amount

+ Details

Name:	ncr_SecuredCreditFacilityMaximumBorrowingAmount
Namespace Prefix:	ncr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest rate stated in the contractual debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Net amount of long-term deferred finance costs capitalized at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt Obligations (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Aug. 22, 2011	Dec. 31, 2010	Sep. 30, 2009
Debt Instrument [Line Items]
Secured Credit Facility Maximum Borrowing Amount		$ 1,400
Maximum Incremental Borrowing Per Secured Credit Facility	500
Deferred Finance Costs, Noncurrent, Net	28
Long-term debt	1,061		10
Interest Coverage Ratio Determination Period	four consecutive fiscal quarters
Capital Lease Obligation At Issuance				5
Debt Instrument, Fair Value Disclosure	1,063		13
Secured Debt [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Margin for Base Rate Loans	0.25%
Secured Debt [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Margin for Base Rate Loans	1.50%
Base Rate [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Federal Funds Rate [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
LIBOR [Member] \| Secured Debt [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Margin for Base Rate Loans	1.25%
LIBOR [Member] \| Secured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Margin for Base Rate Loans	2.50%
Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Reduction in Borrowing Capacity From Usage of Letters of Credit		21
Term Loan [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured Credit Facility Maximum Borrowing Amount		700
Line of Credit Facility, Amount Outstanding		700
Debt Instrument, Periodic Payment	17.5
Debt Instrument, Amont Due at Maturity Date	455
Revolving [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured Credit Facility Maximum Borrowing Amount		700
Line of Credit Facility, Amount Outstanding		350
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	1,050
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term debt	5
Debt Instrument, Interest Rate, Stated Percentage	9.49%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3
Georgia Development Authority IRB Rate				5.00%
Fiscal Quarter In 2012 and 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument Covenant Consolidated Leverage Ratio	350.00%
Fiscal Quarter in 2014 [Member]
Debt Instrument [Line Items]
Debt Instrument Covenant Consolidated Leverage Ratio	325.00%
Fiscal Quarter in 2015 and Beyond [Member]
Debt Instrument [Line Items]
Debt Instrument Covenant Consolidated Leverage Ratio	300.00%
Fiscal Quarters Ending Prior to December 31, 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument Covenant Interest Coverage Ratio	350.00%
Fiscal Quarters Ending On Or After December 31, 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument Covenant Interest Coverage Ratio	400.00%