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Debt - British Pound Sterling Term Loan - Additional Information (Detail)
Mar. 04, 2020
Jan. 06, 2020
GBP (£)
Dec. 31, 2020
Feb. 01, 2017
USD ($)
Debt Instrument [Line Items]        
Maximum borrowing capacity | $       $ 500,000,000
Term Loan [Member] | Bank of America, N.A | British Pound Sterling [Member]        
Debt Instrument [Line Items]        
Maximum borrowing capacity | £   £ 700,000,000    
Debt instrument maturity date   Jan. 15, 2025    
Debt instrument effective date Mar. 06, 2020      
Effective interest rate 0.70%      
Senior unsecured notes, interest rate     1.95%  
Term Loan [Member] | Bank of America, N.A | British Pound Sterling [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Applicable margin adjustable based on pricing grid, percentage   0.85%    
Term Loan [Member] | Bank of America, N.A | British Pound Sterling [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Applicable margin adjustable based on pricing grid, percentage   1.65%    
Term Loan [Member] | Bank of America, N.A | Credit Rating | British Pound Sterling [Member]        
Debt Instrument [Line Items]        
Variable interest rate     1.25%