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Basis of Presentation and Significant Accounting Policies - Narrative (Detail) $ in Millions | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | May 02, 2022 center | Apr. 01, 2022 center | Sep. 01, 2021 center
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Effective income tax rate, continuing operations | 10.20% | 5.90% |  |  |
EMEA |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Unrecognized tax benefits | $ | $ 41.4 |  |  |  |
EMEA and Asia-Pacific |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Unrecognized tax benefits, reversal | $ |  | $ 72.0 |  |  |
GPX India |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Data centers purchased | center |  |  |  |  | 2
MainOne |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Data centers purchased | center |  |  |  | 4 |
Entel |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Data centers purchased | center |  |  | 4 |  |
Metronode |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Unrecognized tax benefits, resulting from pre-acquisition uncertain tax position | $ | $ 33.6 |  |  |  |

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