Derivative, Net Payment (Proceeds) After Settlement

No definition available.

Name:	rxt_DerivativeNetPaymentProceedsAfterSettlement
Namespace Prefix:	rxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Derivative, Notional Amount Deemed Effective

+ References

No definition available.

+ Details

Name:	rxt_DerivativeNotionalAmountDeemedEffective
Namespace Prefix:	rxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Derivative, Notional Amount Settled

+ References

No definition available.

+ Details

Name:	rxt_DerivativeNotionalAmountSettled
Namespace Prefix:	rxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Derivative, Number Of Instruments Held Deemed Effective

+ References

No definition available.

+ Details

Name:	rxt_DerivativeNumberOfInstrumentsHeldDeemedEffective
Namespace Prefix:	rxt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Derivative, Number Of Instruments Matured During Period

+ References

No definition available.

+ Details

Name:	rxt_DerivativeNumberOfInstrumentsMaturedDuringPeriod
Namespace Prefix:	rxt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative, Number of Instruments Settled

+ References

No definition available.

+ Details

Name:	rxt_DerivativeNumberOfInstrumentsSettled
Namespace Prefix:	rxt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994

+ Details

Name:	us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual rate at which a foreign currency can be purchased or sold.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeForwardExchangeRate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

+ Details

Name:	us-gaap_DerivativeLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959

+ Details

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

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeRemainingMaturity1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

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

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_InterestRateSwapOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_InterestRateSwapTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardThreeAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardThreeBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardThreeCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFourAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFourBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFourCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFiveAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFiveBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=rxt_ForeignExchangeForwardFiveCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivatives - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Derivatives - Narrative (Details) $ in Millions	Sep. 30, 2020 USD ($) instrument € / $ £ / $ $ / $	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) instrument € / $ £ / $ $ / $	Sep. 30, 2019 USD ($) instrument	Dec. 31, 2018 USD ($) instrument	Dec. 31, 2020 USD ($) € / $ £ / $ $ / $	Dec. 31, 2020 GBP (£) € / $ £ / $ $ / $	Dec. 31, 2020 EUR (€) € / $ £ / $ $ / $	Dec. 31, 2020 MXN ($) € / $ £ / $ $ / $	Sep. 30, 2020 GBP (£) instrument € / $ £ / $ $ / $	Sep. 30, 2020 EUR (€) instrument € / $ £ / $ $ / $	Sep. 30, 2020 MXN ($) instrument € / $ £ / $ $ / $	Jun. 30, 2020 USD ($) instrument € / $ £ / $ $ / $	Jun. 30, 2020 GBP (£) instrument € / $ £ / $ $ / $	Jun. 30, 2020 EUR (€) instrument € / $ £ / $ $ / $	Jun. 30, 2020 MXN ($) instrument € / $ £ / $ $ / $	Mar. 31, 2020 instrument	Mar. 26, 2020 USD ($) instrument	Mar. 26, 2020 GBP (£) instrument	Jan. 09, 2020 USD ($)	Dec. 31, 2019 USD ($) instrument	Nov. 30, 2019 GBP (£) instrument £ / $	Nov. 29, 2019 USD ($)	Nov. 30, 2018 USD ($) instrument £ / $	Nov. 30, 2018 GBP (£) instrument £ / $	Feb. 03, 2017 USD ($)	Dec. 31, 2016 instrument
Derivative [Line Items]
Liabilities	$ 92,000,000.0		$ 92,000,000.0																		$ 39,500,000
Interest expense	68,300,000	$ 80,900,000	209,200,000	$ 270,700,000
Cash flow hedge losses expected to be reclassified as an increase to interest expense over the next twelve months			19,200,000
Aggregate fair value, net liability position	91,500,000		91,500,000
Derivatives designated as hedging instruments
Derivative [Line Items]
Liabilities	91,700,000		91,700,000																		0
Interest rate swaps
Derivative [Line Items]
Liabilities	$ 91,700,000		$ 91,700,000																		$ 36,600,000
Interest rate swaps \| Cash Flow Hedging
Derivative [Line Items]
Number of derivative instruments \| instrument																					0
Interest rate swaps \| Cash Flow Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Liabilities																				$ 39,900,000
Interest Rate Swap - Entered in December 2016
Derivative [Line Items]
Number of derivative instruments \| instrument	3		3							3	3	3															7
Notional amount	$ 1,050,000,000.00		$ 1,050,000,000.00																							$ 1,500,000,000
Number of agreements matured during period \| instrument			1	1	2
Remaining maturity period			2 years
Interest Rate Swap - Entered in December 2016 \| Minimum
Derivative [Line Items]
Fixed interest rate specified in swap agreement	1.7625%		1.7625%							1.7625%	1.7625%	1.7625%
Interest Rate Swap - Entered in December 2016 \| Maximum
Derivative [Line Items]
Fixed interest rate specified in swap agreement	1.904%		1.904%							1.904%	1.904%	1.904%
Interest Rate Swap - Entered in December 2018
Derivative [Line Items]
Number of derivative instruments \| instrument					4
Notional amount					$ 1,350,000,000
Number of instruments held deemed effective \| instrument	2		2							2	2	2
Notional amount deemed effective	$ 300,000,000		$ 300,000,000
Interest Rate Swap - Entered in December 2018 \| Minimum
Derivative [Line Items]
Fixed interest rate specified in swap agreement	2.735%		2.735%							2.735%	2.735%	2.735%
Interest Rate Swap - Entered in December 2018 \| Maximum
Derivative [Line Items]
Fixed interest rate specified in swap agreement	2.749%		2.749%							2.749%	2.749%	2.749%
Foreign Currency Forward Contract - GBP to USD - Entered In November 2018
Derivative [Line Items]
Number of derivative instruments \| instrument																								1	1
Notional amount																								$ 97,500,000	£ 75,000,000
Forward exchange rate \| £ / $																								1.3002	1.3002
Net payment (receipt) after settlement																							$ (800,000)
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019
Derivative [Line Items]
Number of derivative instruments \| instrument																						2
Notional amount \| £																						£ 100,000,000
Net payment (receipt) after settlement																		$ (1,900,000)
Number of derivative instruments settled \| instrument																		1	1
Notional amount settled \| £																			£ 50,000,000
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019 \| Minimum
Derivative [Line Items]
Forward exchange rate \| £ / $																						1.2375
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019 \| Maximum
Derivative [Line Items]
Forward exchange rate \| £ / $																						1.3475
Foreign Currency Forward Contract - Entered in March 2020
Derivative [Line Items]
Number of derivative instruments \| instrument																	3
Net payment (receipt) after settlement													$ 1,700,000
Number of derivative instruments settled \| instrument													3	3	3	3
Foreign Currency Forward Contract - GBP to USD - Entered in March 2020
Derivative [Line Items]
Notional amount													$ 38,100,000	£ 32,000,000
Forward exchange rate \| £ / $													1.1902	1.1902	1.1902	1.1902
Foreign Currency Forward Contract - Euro to USD - Entered in March 2020
Derivative [Line Items]
Notional amount													$ 6,600,000		€ 6,000,000
Forward exchange rate \| € / $													1.0921	1.0921	1.0921	1.0921
Foreign Currency Forward Contract - USD to MXN Entered in March 2020
Derivative [Line Items]
Notional amount													$ 2,100,000			$ 50.0
Forward exchange rate \| $ / $													24.2040	24.2040	24.2040	24.2040
Foreign Currency Forward Contract - Entered in June 2020
Derivative [Line Items]
Number of derivative instruments \| instrument													3	3	3	3
Net payment (receipt) after settlement	$ 1,600,000		$ 1,600,000
Number of derivative instruments settled \| instrument	3		3							3	3	3
Foreign Currency Forward Contract - GBP to USD - Entered in June 2020
Derivative [Line Items]
Notional amount	$ 39,700,000		$ 39,700,000							£ 32,000,000
Forward exchange rate \| £ / $	1.24095		1.24095							1.24095	1.24095	1.24095
Foreign Currency Forward Contract - Euro to USD - Entered in June 2020
Derivative [Line Items]
Notional amount	$ 6,700,000		$ 6,700,000								€ 6,000,000
Forward exchange rate \| € / $	1.1241		1.1241							1.1241	1.1241	1.1241
Foreign Currency Forward Contract - USD to MXN Entered in June 2020
Derivative [Line Items]
Notional amount	$ 2,200,000		$ 2,200,000									$ 50.0
Forward exchange rate \| $ / $	23.0330		23.0330							23.0330	23.0330	23.0330
Foreign Currency Forward Contract - Entered in September 2020
Derivative [Line Items]
Number of derivative instruments \| instrument	3		3							3	3	3
Foreign Currency Forward Contract - GBP to USD - Entered in September 2020 \| Forecast
Derivative [Line Items]
Notional amount						$ 41,100,000	£ 32,000,000
Forward exchange rate \| £ / $						1.28495	1.28495	1.28495	1.28495
Foreign Currency Forward Contract - Euro to USD - Entered in September 2020 \| Forecast
Derivative [Line Items]
Notional amount						$ 7,000,000.0		€ 6,000,000
Forward exchange rate \| € / $						1.1684	1.1684	1.1684	1.1684
Foreign Currency Forward Contract - USD to MXN Entered in September 2020 \| Forecast
Derivative [Line Items]
Notional amount						$ 2,200,000			$ 50.0
Forward exchange rate \| $ / $						22.8340	22.8340	22.8340	22.8340