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Debt - Summary of Long-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Debt Instrument [Line Items]        
Long-Term Debt $ 2,600.0 $ 2,320.3    
Other 7.5      
Other   1.4    
Debt and lease obligation, gross 2,607.5 2,321.7    
Unamortized Debt Issuance Costs (20.1) (16.2)    
Unamortized Original Issue Premium (Discount) 8.6 9.0    
Debt and lease obligation 2,596.0 2,314.5    
Less — Current portion (0.8) (14.2)    
Long-term debt 2,595.2 $ 2,300.3    
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]   Long-term debt    
Unsecured Debt | Credit Agreement        
Debt Instrument [Line Items]        
Long-Term Debt   $ 220.3    
Unamortized Debt Issuance Costs   (0.6)    
Unamortized Original Issue Premium (Discount)   0.0    
Long-Term Debt, Net   $ 219.7    
Yield to maturity   1.36%    
Senior Notes | 3.8% Senior Notes due 2027 (the "2027 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt 550.0 $ 750.0    
Unamortized Debt Issuance Costs (2.5) (4.1)    
Unamortized Original Issue Premium (Discount) (2.2) (3.5)    
Long-Term Debt, Net $ 545.3 $ 742.4    
Yield to maturity 3.885% 3.885%   3.885%
Stated interest rate 3.80%     3.80%
Senior Notes | 4.25% Senior Notes due 2029 (the "2029 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt $ 375.0 $ 375.0    
Unamortized Debt Issuance Costs (2.3) (2.6)    
Unamortized Original Issue Premium (Discount) (0.9) (1.0)    
Long-Term Debt, Net $ 371.8 $ 371.4    
Yield to maturity 4.288% 4.288% 4.288%  
Stated interest rate 4.25%   4.25%  
Senior Notes | 3.5% Senior Notes due 2030 (the "2030 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt $ 350.0 $ 350.0    
Unamortized Debt Issuance Costs (2.3) (2.6)    
Unamortized Original Issue Premium (Discount) (0.7) (0.7)    
Long-Term Debt, Net $ 347.0 $ 346.7    
Yield to maturity 3.525% 3.525%    
Stated interest rate 3.50% 3.50%    
Senior Notes | 2.6% Senior Notes due 2032 (the "2032 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt $ 350.0      
Unamortized Debt Issuance Costs (3.1)      
Unamortized Original Issue Premium (Discount) (0.8)      
Long-Term Debt, Net $ 346.1      
Yield to maturity 2.624%      
Stated interest rate 2.60%      
Senior Notes | 5.25% Senior Notes due 2049 (the "2049 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt $ 625.0 $ 625.0    
Unamortized Debt Issuance Costs (6.1) (6.3)    
Unamortized Original Issue Premium (Discount) 13.7 14.2    
Long-Term Debt, Net $ 632.6 $ 632.9    
Yield to maturity 5.103% 5.103% 5.363%  
Stated interest rate 5.25%   5.25%  
Senior Notes | 3.55% Senior Notes due 2052 (the "2052 Notes")        
Debt Instrument [Line Items]        
Long-Term Debt $ 350.0      
Unamortized Debt Issuance Costs (3.8)      
Unamortized Original Issue Premium (Discount) (0.5)      
Long-Term Debt, Net $ 345.7      
Yield to maturity 3.558%      
Stated interest rate 3.55%