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Debt - 3.325% Senior Unsecured Notes Due 2025 - Additional Information (Detail) - 3.325% Senior Unsecured Notes Due 2025 [Member] - EUR (€)
12 Months Ended
Mar. 24, 2017
Dec. 31, 2020
Dec. 31, 2019
[1]
Debt Instrument [Line Items]      
Senior unsecured notes face amount € 500,000,000    
Senior unsecured notes, payable term   Interest on the notes is payable annually on March 24 of each year.  
Senior unsecured notes, interest rate 3.325% 3.325% [1] 3.325%
Debt instrument maturity date Mar. 24, 2025    
[1] Non-U.S. dollar denominated debt that reflects the exchange rate at period end.