Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Principles of Consolidation	The unaudited consolidated financial statements include the accounts of Rackspace Technology, Inc. and our wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated in consolidation.
Basis of Presentation	The unaudited consolidated financial statements as of March 31, 2021, and for the three months ended March 31, 2020 and 2021, have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Accordingly, certain financial information and disclosures required for financial statements prepared under GAAP have been omitted in accordance with the SEC disclosure rules and regulations that permit reduced disclosure for interim periods. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020 ("Annual Report on Form 10-K"). The unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements included in our Annual Report on Form 10-K and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of our financial position as of March 31, 2021, and our results of operations, cash flows and stockholders' equity for the three months ended March 31, 2020 and 2021. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2021, or for any other interim period, or for any other future year.
Use of Estimates And Change in Accounting Estimate	The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenue and expenses, and related disclosures of contingent assets and liabilities in the consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate our estimates, including those related to the allowance for doubtful accounts, useful lives of property, equipment and software, software capitalization, incremental borrowing rates for lease liability measurement, fair values of intangible assets and reporting units, useful lives of intangible assets, share-based compensation, contingencies, and income taxes, among others. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from our estimates.Change in Accounting EstimateIn March 2021, we completed an assessment of the useful lives of certain assets within the Computers and equipment asset class. The timing of this review was based on a combination of factors accumulating over time that provided the company with updated information to make a better estimate on the economic lives of certain property and equipment. These factors included changes in customer purchasing patterns, technological advancements and the availability of extended equipment warranties. The assessment resulted in a revision within our policy ranges for certain useful lives in this asset class. This change in accounting estimate was effective in the first quarter of 2021.
Reclassifications	Reclassifications Certain reclassifications have been made to the prior period consolidated financial statements to conform to the current period presentation. Specifically, the current portion of "Finance lease liabilities" is now presented separately from "Other current liabilities" in the Consolidated Balance Sheets.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, which removes certain exceptions to the general principles in Topic 740 and improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. We adopted this guidance on January 1, 2021. The adoption of this guidance did not have a material impact on our consolidated financial statements.
Earnings Per Share	Basic loss per share is calculated by dividing net loss attributable to common stockholders by the weighted average shares outstanding during the period.
Derivatives	We utilize derivative instruments, including interest rate swap agreements and foreign currency hedging contracts, to manage our exposure to interest rate risk and foreign currency fluctuations. We only hold such instruments for economic hedging purposes, not for speculative or trading purposes. Our derivative instruments are transacted only with highly-rated institutions, which reduces our exposure to credit risk in the event of nonperformance. We are exposed to interest rate risk associated with fluctuations in interest rates on the floating-rate Term Loan Facility. The objective in using interest rate derivatives is to manage our exposure to interest rate movements. To accomplish this objective, we have entered into interest rate swap agreements as part of our interest rate risk management strategy. Interest rate swaps involve the receipt of variable amounts from a counterparty in exchange for the company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. On January 9, 2020, we designated certain of our swaps as cash flow hedges. On the designation date, the cash flow hedges were in a $39.9 million liability position. The cash flow hedges were expected to be highly effective on the designation date and, on a quarterly basis, we performed retrospective and prospective regression assessments to determine whether the cash flow hedges continue to be highly effective. As long as the cash flow hedges are highly effective, changes in fair value are recorded to "Accumulated other comprehensive income (loss)" in the Consolidated Balance Sheets and reclassified to "Interest expense" in the period when the underlying transaction affects earnings. The income tax effects of cash flow hedges are released from "Accumulated other comprehensive income (loss)" in the period when the underlying transaction affects earnings. Any stranded income tax effects are released from “Accumulated other comprehensive income (loss)” into “Benefit (provision) for income taxes” under the portfolio approach. As of December 31, 2020, all of our cash flow hedges were highly effective.The majority of our customers are invoiced, and the majority of our expenses are paid, by us or our subsidiaries in the functional currency of our company or our subsidiaries, respectively. We also have exposure to foreign currency transaction gains and losses as the result of certain receivables due from our foreign subsidiaries. As such, the results of operations and cash flows of our foreign subsidiaries are subject to fluctuations in foreign currency exchange rates. The objective of our foreign currency hedging contracts is to manage our exposure to foreign currency movements. To accomplish this objective, we may enter into foreign currency forward contracts and collars. A forward contract is an agreement to buy or sell a quantity of a currency at a predetermined future date and at a predetermined exchange rate. A collar is a strategy that uses a combination of a purchased put option and a sold call option with equal premiums to hedge a portion of anticipated cash flows, or to limit possible gains or losses on an underlying asset or liability to a specific range. The put and call options have identical notional amounts and settlement dates.These contracts are recognized at fair value in the Consolidated Balance Sheets and are valued using pricing models that rely on market observable inputs such as current exchange rates, which are classified as Level 2 inputs within the fair value hierarchy. We have not designated these contracts as cash flow hedges for accounting purposes, therefore, all changes in fair value are recorded in "Other income (expense), net."

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

The unaudited consolidated financial statements include the accounts of Rackspace Technology, Inc. and our wholly-owned subsidiaries. Intercompany transactions and balances have been eliminated in consolidation.

Basis of Presentation

The unaudited consolidated financial statements as of March 31, 2021, and for the three months ended March 31, 2020 and 2021, have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Accordingly, certain financial information and disclosures required for financial statements prepared under GAAP have been omitted in accordance with the SEC disclosure rules and regulations that permit reduced disclosure for interim periods. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020 ("Annual Report on Form 10-K"). The unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements included in our Annual Report on Form 10-K and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of our financial position as of March 31, 2021, and our results of operations, cash flows and stockholders' equity for the three months ended March 31, 2020 and 2021.

The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2021, or for any other interim period, or for any other future year.

Use of Estimates And Change in Accounting Estimate

The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenue and expenses, and related disclosures of contingent assets and liabilities in the consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate our estimates, including those related to the allowance for doubtful accounts, useful lives of property, equipment and software, software capitalization, incremental borrowing rates for lease liability measurement, fair values of intangible assets and reporting units, useful lives of intangible assets, share-based compensation, contingencies, and income taxes, among others. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from our estimates.Change in Accounting EstimateIn March 2021, we completed an assessment of the useful lives of certain assets within the Computers and equipment asset class. The timing of this review was based on a combination of factors accumulating over time that provided the company with updated information to make a better estimate on the economic lives of certain property and equipment. These factors included changes in customer purchasing patterns, technological advancements and the availability of extended equipment warranties. The assessment resulted in a revision within our policy ranges for certain useful lives in this asset class. This change in accounting estimate was effective in the first quarter of 2021.

Reclassifications

Certain reclassifications have been made to the prior period consolidated financial statements to conform to the current period presentation. Specifically, the current portion of "Finance lease liabilities" is now presented separately from "Other current liabilities" in the Consolidated Balance Sheets.

Recently Adopted Accounting Pronouncements

Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, which removes certain exceptions to the general principles in Topic 740 and improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. We adopted this guidance on January 1, 2021. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Earnings Per Share

Basic loss per share is calculated by dividing net loss attributable to common stockholders by the weighted average shares outstanding during the period.

Derivatives

We utilize derivative instruments, including interest rate swap agreements and foreign currency hedging contracts, to manage our exposure to interest rate risk and foreign currency fluctuations. We only hold such instruments for economic hedging purposes, not for speculative or trading purposes. Our derivative instruments are transacted only with highly-rated institutions, which reduces our exposure to credit risk in the event of nonperformance. We are exposed to interest rate risk associated with fluctuations in interest rates on the floating-rate Term Loan Facility. The objective in using interest rate derivatives is to manage our exposure to interest rate movements. To accomplish this objective, we have entered into interest rate swap agreements as part of our interest rate risk management strategy. Interest rate swaps involve the receipt of variable amounts from a counterparty in exchange for the company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. On January 9, 2020, we designated certain of our swaps as cash flow hedges. On the designation date, the cash flow hedges were in a $39.9 million liability position. The cash flow hedges were expected to be highly effective on the designation date and, on a quarterly basis, we performed retrospective and prospective regression assessments to determine whether the cash flow hedges continue to be highly effective. As long as the cash flow hedges are highly effective, changes in fair value are recorded to "Accumulated other comprehensive income (loss)" in the Consolidated Balance Sheets and reclassified to "Interest expense" in the period when the underlying transaction affects earnings. The income tax effects of cash flow hedges are released from "Accumulated other comprehensive income (loss)" in the period when the underlying transaction affects earnings. Any stranded income tax effects are released from “Accumulated other comprehensive income (loss)” into “Benefit (provision) for income taxes” under the portfolio approach. As of December 31, 2020, all of our cash flow hedges were highly effective.The majority of our customers are invoiced, and the majority of our expenses are paid, by us or our subsidiaries in the functional currency of our company or our subsidiaries, respectively. We also have exposure to foreign currency transaction gains and losses as the result of certain receivables due from our foreign subsidiaries. As such, the results of operations and cash flows of our foreign subsidiaries are subject to fluctuations in foreign currency exchange rates. The objective of our foreign currency hedging contracts is to manage our exposure to foreign currency movements. To accomplish this objective, we may enter into foreign currency forward contracts and collars. A forward contract is an agreement to buy or sell a quantity of a currency at a predetermined future date and at a predetermined exchange rate. A collar is a strategy that uses a combination of a purchased put option and a sold call option with equal premiums to hedge a portion of anticipated cash flows, or to limit possible gains or losses on an underlying asset or liability to a specific range. The put and call options have identical notional amounts and settlement dates.These contracts are recognized at fair value in the Consolidated Balance Sheets and are valued using pricing models that rely on market observable inputs such as current exchange rates, which are classified as Level 2 inputs within the fair value hierarchy. We have not designated these contracts as cash flow hedges for accounting purposes, therefore, all changes in fair value are recorded in "Other income (expense), net."