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Debt Facilities - Senior Credit Facility and Revolving Facility (Detail)
€ in Millions
1 Months Ended 12 Months Ended
Apr. 15, 2020
USD ($)
Apr. 15, 2020
EUR (€)
Jul. 31, 2018
USD ($)
Jul. 31, 2018
JPY (¥)
Jul. 26, 2018
JPY (¥)
Dec. 12, 2017
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
letter_of_credit
Dec. 31, 2020
JPY (¥)
letter_of_credit
Dec. 31, 2019
USD ($)
Jul. 31, 2018
JPY (¥)
Oct. 31, 2013
USD ($)
Debt Instrument [Line Items]                        
Long term debt, gross               $ 1,370,970,000   $ 1,370,118,000    
Senior Unsecured 364-Day Term Loan Facilities | Notes Payable to Banks                        
Debt Instrument [Line Items]                        
Aggregate principal amount $ 750,000,000.0                      
Closing Date Facility | Notes Payable to Banks                        
Debt Instrument [Line Items]                        
Aggregate principal amount 500,000,000.0                      
Delayed Draw Facility | Notes Payable to Banks                        
Debt Instrument [Line Items]                        
Aggregate principal amount 250,000,000.0                      
Closing Date Facility, Series 1 | Notes Payable to Banks                        
Debt Instrument [Line Items]                        
Amount drawn on Closing Date Facility 391,000,000.0                      
Closing Date Facility, Series 2 | Notes Payable to Banks                        
Debt Instrument [Line Items]                        
Amount drawn on Closing Date Facility $ 109,800,000 € 100.0                    
Revolving credit facility borrowings | Letter of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity               $ 250,000,000.0        
Revolving credit facility borrowings | Letter of Credit | Minimum                        
Debt Instrument [Line Items]                        
Margin rate (percent)               0.00%        
Quarterly facility fee (percent)               0.15%        
Revolving credit facility borrowings | Letter of Credit | Maximum                        
Debt Instrument [Line Items]                        
Margin rate (percent)               0.40%        
Quarterly facility fee (percent)               0.30%        
Revolving credit facility borrowings | Letter of Credit | LIBOR | Minimum                        
Debt Instrument [Line Items]                        
Variable rate (percent)               0.85%        
Revolving credit facility borrowings | Letter of Credit | LIBOR | Maximum                        
Debt Instrument [Line Items]                        
Variable rate (percent)               1.40%        
Revolving credit facility borrowings | Letter of Credit | Federal Funds Rate                        
Debt Instrument [Line Items]                        
Variable rate (percent)               0.50%        
Revolving credit facility borrowings | Letter of Credit | One month LIBOR                        
Debt Instrument [Line Items]                        
Variable rate (percent)               1.00%        
Revolving credit facility borrowings | Senior Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity           $ 3,000,000,000.0            
Debt instrument, term           5 years            
Revolving credit facility borrowings | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity           $ 2,000,000,000.0            
Amount borrowed on revolving facility             $ 250,000,000.0          
Amount available to borrow under revolving facility               $ 1,900,000,000        
Revolving credit facility borrowings | Term Loan Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity           $ 1,000,000,000.0            
Revolving credit facility borrowings | Letter of Credit                        
Debt Instrument [Line Items]                        
Irrevocable letters of credit outstanding | letter_of_credit               37 37      
Letters of credit outstanding               $ 74,600,000        
Revolving credit facility borrowings | Revolving credit facility borrowings                        
Debt Instrument [Line Items]                        
Repay percentage         5.00% 5.00%            
Debt issuance costs, net               1,200,000        
Revolving credit facility borrowings | Revolving credit facility borrowings | Minimum                        
Debt Instrument [Line Items]                        
Variable rate (percent)         1.00% 1.00%            
Revolving credit facility borrowings | Revolving credit facility borrowings | Maximum                        
Debt Instrument [Line Items]                        
Variable rate (percent)         1.70% 1.70%            
Unsecured debt | Revolving credit facility borrowings | JPY Term Loan                        
Debt Instrument [Line Items]                        
Aggregate principal debt amount issued     $ 424,700,000   ¥ 47,500,000,000           ¥ 47,500,000,000  
Long term debt, gross               $ 408,500,000 ¥ 42,200,000,000      
Effective interest rate (percent)               1.74% 1.74%      
Debt issuance costs, net               $ 2,100,000        
Unsecured debt | Revolving credit facility borrowings | Japanese Yen Term Loan                        
Debt Instrument [Line Items]                        
Repayment of debt     $ 391,300,000 ¥ 43,800,000,000                
Mortgage Payable | Frankfurt Kleyer 90 Carrier Hotel                        
Debt Instrument [Line Items]                        
Effective interest rate (percent)                       4.25%
Loans payable                       $ 42,900,000
Mortgage Payable | Toronto 2 Data Center                        
Debt Instrument [Line Items]                        
Effective interest rate (percent)                   3.63%    
Mortgage Payable | Toronto 2 Data Center | Toronto 2 Data Center                        
Debt Instrument [Line Items]                        
Loans payable                   $ 43,800,000