Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Debt and Capital Leases Outstanding (Details)

v3.21.2
Debt - Summary of Debt and Capital Leases Outstanding (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument      
Total debt $ 1,910,300,000 $ 1,515,500,000  
Less: current installments of long-term debt 12,900,000 7,400,000  
Total long-term debt 1,897,400,000 1,508,100,000  
Domestic Line of Credit | USD Term Loan      
Debt Instrument      
Debt face amount 1,150,000,000   $ 750,000,000
Total debt 1,115,100,000 727,500,000  
Unamortized discount (premium) and debt issuance costs, net $ 13,400,000 $ 7,600,000  
Effective interest rate (percent) 2.10% 2.40%  
Domestic Line of Credit | USD Term Loan | LIBOR      
Debt Instrument      
Spread on variable rate (percent) 2.00%    
Senior Notes | USD Senior Notes, Due 2028      
Debt Instrument      
Debt face amount $ 800,000,000    
Stated interest rate (percent) 3.875%    
Total debt $ 789,100,000 $ 788,000,000.0  
Unamortized discount (premium) and debt issuance costs, net $ 10,900,000 $ 12,000,000  
Effective interest rate (percent) 4.10% 4.10%  
Other      
Debt Instrument      
Total debt $ 6,100,000 $ 0