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Commitments and Contingencies (Detail) - Dec. 31, 2020
€ in Millions, £ in Millions
EUR (€)
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GBP (£)
claim
USD ($)
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Other Commitments [Line Items]      
Lease commitment     $ 684,100,000
Number of pending claims | claim 0 0 0
Severance payment percent, scenario one 100.00% 100.00% 100.00%
Severance payment percent, scenario two 200.00% 200.00% 200.00%
Severance payment percent, scenario three 200.00% 200.00% 200.00%
Indemnification of officers and directors      
Other Commitments [Line Items]      
Liabilities under guarantor agreements     $ 0
General indemnification      
Other Commitments [Line Items]      
Liabilities under guarantor agreements     0
Indemnification of business partners      
Other Commitments [Line Items]      
Liabilities under guarantor agreements     0
Capital expenditures      
Other Commitments [Line Items]      
Purchase commitments     1,100,000,000
Miscellaneous purchase commitments      
Other Commitments [Line Items]      
Purchase commitments     1,300,000,000
Equinix, Inc. | EMEA Joint Venture | Equity contribution commitment      
Other Commitments [Line Items]      
Other commitment € 13.8 £ 6.6 $ 25,800,000