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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) data_center_site | Dec. 31, 2020 USD ($) data_center_site | Dec. 31, 2020 USD ($) service_provider data_center_site | Dec. 31, 2020 USD ($) data_center_site country | Dec. 31, 2020 USD ($) data_center_site reporting_segment | Dec. 31, 2020 USD ($) data_center_site | Dec. 31, 2020 USD ($) segment data_center_site | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Nov. 02, 2020 data_center | Oct. 01, 2020 data_center | Jan. 08, 2020 data_center | Jan. 01, 2020 USD ($) | Jan. 01, 2019 USD ($) | Jan. 01, 2018 USD ($) | Dec. 31, 2017 USD ($)
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of network providers that provide internet access | service_provider |  |  |  | 1,800 |  |  |  |  |  |  |  |  |  |  |  |  |
Data centers sites | data_center_site |  | 224 | 224 | 224 | 224 | 224 | 224 | 224 |  |  |  |  |  |  |  |  |
Number of markets | country |  |  |  |  | 63 |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents maturity period (in days) |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments, impairment charges |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-marketable equity investments, impairment charges |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges on property plant and equipment |  |  | 7,306,000 |  |  |  |  |  | $ 15,790,000 | $ 0 |  |  |  |  |  |  |
Impairment charges |  |  | 7,306,000 |  |  |  |  |  | 15,790,000 | 0 |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  | 3 |  | 3 |  |  |  |  |  |  |  |  |
Impairment charges, intangible assets |  |  | 0 |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Percentage of recurring revenue |  |  |  |  |  |  | 90.00% |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  | $ (10,634,118,000) | (10,634,118,000) | $ (10,634,118,000) | $ (10,634,118,000) | $ (10,634,118,000) | $ (10,634,118,000) | $ (10,634,118,000) | (8,840,382,000) | (7,219,279,000) |  |  |  |  |  |  | $ (6,849,790,000)
Operating lease right-of-use assets |  | 1,475,057,000 | 1,475,057,000 | 1,475,057,000 | 1,475,057,000 | 1,475,057,000 | 1,475,057,000 | 1,475,057,000 | 1,475,367,000 |  |  |  |  |  | $ 1,468,762,000 |  |
Operating lease liability |  | $ 1,462,834,000 | $ 1,462,834,000 | $ 1,462,834,000 | $ 1,462,834,000 | $ 1,462,834,000 | $ 1,462,834,000 | $ 1,462,834,000 |  |  |  |  |  |  |  |  |
Capitalized Contract Cost, Amortization Period |  | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges on property plant and equipment |  |  | $ 0 |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
RSU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
RSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COVID-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to employees | $ 8,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Axtel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of data centers acquired | data_center |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |
Bell Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of data centers acquired | data_center |  |  |  |  |  |  |  |  |  |  | 1 | 12 |  |  |  |  |
Adjustment from adoption of new accounting standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  |  |  |  |  |  |  |  | 900,000 | 5,973,000 |  |  |  |  |  |  | (269,776,000)
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short term investment maturity (in days and years) |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment terms |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short term investment maturity (in days and years) |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment terms |  | 45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paris IBX Data Center | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, requirement of payment, terms |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paris IBX Data Center | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, requirement of payment, terms |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Executive Officer | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Executive Officer | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  | $ (1,760,302,000) | (1,760,302,000) | $ (1,760,302,000) | $ (1,760,302,000) | $ (1,760,302,000) | $ (1,760,302,000) | $ (1,760,302,000) | (1,391,425,000) | (889,948,000) |  |  |  |  |  |  | (252,689,000)
Retained Earnings | Adjustment from adoption of new accounting standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  |  |  |  |  |  |  |  | 900,000 | 5,973,000 |  |  |  | $ 900,000 |  |  | (271,900,000)
Equinix Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  | $ (10,633,988,000) | $ (10,633,988,000) | $ (10,633,988,000) | $ (10,633,988,000) | $ (10,633,988,000) | $ (10,633,988,000) | $ (10,633,988,000) | (8,840,606,000) | (7,219,279,000) |  |  |  |  |  |  | (6,849,790,000)
Equinix Stockholders' Equity | Adjustment from adoption of new accounting standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  |  |  |  |  |  |  |  | $ 900,000 | $ 5,973,000 |  |  |  |  |  |  | $ (269,776,000)
Retained Earnings and ACOI | Adjustment from adoption of new accounting standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Item Effected [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (269,800,000) |

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