Debt Instrument Redemption Price As Percentage of Principle Amount

No definition available.

Name:	ncr_DebtInstrumentRedemptionPriceAsPercentageofPrincipleAmount
Namespace Prefix:	ncr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Principle Amount Notes Were Sold At

+ References

No definition available.

+ Details

Name:	ncr_PercentageOfPrincipleAmountNotesWereSoldAt
Namespace Prefix:	ncr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Debt Obligations Senior Unsecured Notes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Sep. 07, 2019	Aug. 21, 2019	Dec. 31, 2018	Dec. 19, 2013	Dec. 18, 2012	Sep. 17, 2012
Debt Instrument [Line Items]
Long-term Debt	$ 3,591,000,000
Write off of Deferred Debt Issuance Cost	2,000,000
Long-term debt	3,277,000,000			$ 2,980,000,000
5.750% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 500,000,000
Debt instrument stated percentage			5.75%
Percentage of Principle Amount Notes Were Sold At			100.00%
Long-term debt	$ 500,000,000			0
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
5.750% Senior Notes due 2027 [Member] \| Twelve month period commencing on September 1, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	102.875%
5.750% Senior Notes due 2027 [Member] \| Twelve month period commencing on September 1, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	101.438%
5.750% Senior Notes due 2027 [Member] \| Twelve month period commencing on September 1, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
5% Notes Due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt							$ 600,000,000
Percentage of Principle Amount Notes Were Sold At							100.00%
Long-term debt	$ 600,000,000			600,000,000
5% Notes Due 2022 [Member] \| Twelve Month Period Commencing On July 15, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	102.50%
5% Notes Due 2022 [Member] \| Twelve Month Period Commencing On July 15, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	101.667%
5% Notes Due 2022 [Member] \| Twelve Month Period Commencing On July 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.833%
5% Notes Due 2022 [Member] \| Twelve Month Period Commencing On July 15, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
4.625% Notes Due 2021 [Member] [Member]
Debt Instrument [Line Items]
Long-term Debt						$ 500,000,000
Debt instrument stated percentage						4.625%
Percentage of Principle Amount Notes Were Sold At		100.00%
Long-term debt	$ 0			500,000,000
4.625% Notes Due 2021 [Member] [Member] \| Twelve Month Period Commencing On February 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
5.875% Notes due 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 400,000,000
Percentage of Principle Amount Notes Were Sold At					100.00%
Long-term debt	$ 0			400,000,000
5.875% Notes due 2021 [Member] \| Twelve Month Period Commencing On December 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
6.375% Notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 700,000,000
Percentage of Principle Amount Notes Were Sold At					100.00%
Long-term debt	$ 700,000,000			700,000,000
6.375% Notes due 2023 [Member] \| Twelve Month Period Commencing On December 15, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	103.188%
6.375% Notes due 2023 [Member] \| Twelve Month Period Commencing On December 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	102.125%
6.375% Notes due 2023 [Member] \| Twelve Month Period Commencing On December 15, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	101.063%
6.125% Senior Notes due 2029 [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 500,000,000
Debt instrument stated percentage			6.125%
Percentage of Principle Amount Notes Were Sold At			100.00%
Long-term debt	$ 500,000,000			0
6.125% Senior Notes due 2029 [Member] \| Twelve month period commencing on September 1, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	103.063%
6.125% Senior Notes due 2029 [Member] \| Twelve Month Period Commencing September 1, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	102.042%
6.125% Senior Notes due 2029 [Member] \| Twelve month period commencing on September 1, 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	101.021%
6.125% Senior Notes due 2029 [Member] \| Twelve month period commencing on September 1, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption Price As Percentage of Principle Amount	100.00%
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term debt	$ 0			$ 0
Guarantor Subsidiaries [Member] \| NCR International, Inc. [Member] \| 5% Notes Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument stated percentage	5.00%
Guarantor Subsidiaries [Member] \| NCR International, Inc. [Member] \| 5.875% Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument stated percentage	5.875%
Guarantor Subsidiaries [Member] \| NCR International, Inc. [Member] \| 6.375% Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument stated percentage	6.375%