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Long-Term Debt Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Nov. 25, 2019
Dec. 18, 2014
Dec. 08, 2014
Nov. 24, 2014
Debt Instrument [Line Items]            
Total long-term debt $ 3,572,058 $ 3,050,257        
Unamortized discount and debt issuance costs (20,332) (24,136)        
Current portion of long-term debt 804,677 187,336        
Long-term debt $ 2,767,381 $ 2,862,921        
Credit Facilities [Member]            
Debt Instrument [Line Items]            
Basis Point Fee 0.0010          
1.125% Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.01125% 0.01125% 1.125%      
1.625% Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.01625% 0.01625% 1.625%      
1.875% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.01875% 0.01875%   1.875% 1.875%  
3.45% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.0345% 0.0345% 3.45%      
4.15% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.0415% 0.0415%       4.15%
4.50% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 4.50%          
5.45% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate 0.0545% 0.0545%       5.45%
Unsecured Debt | 1.125% Notes            
Debt Instrument [Line Items]            
Total long-term debt $ 610,800 $ 554,900        
Unsecured Debt | 1.625% Notes            
Debt Instrument [Line Items]            
Total long-term debt 610,800 554,900        
Unsecured Debt | Floating Rate Notes            
Debt Instrument [Line Items]            
Total long-term debt 200,000 200,000        
Senior Notes | 1.875% Senior Notes            
Debt Instrument [Line Items]            
Total long-term debt 480,007 436,073        
Senior Notes | 3.45% Senior Notes            
Debt Instrument [Line Items]            
Total long-term debt 300,000 300,000        
Senior Notes | 4.15% Senior Notes            
Debt Instrument [Line Items]            
Total long-term debt 425,000 425,000        
Senior Notes | 5.45% Senior Notes            
Debt Instrument [Line Items]            
Total long-term debt 350,000 350,000        
Commercial Paper            
Debt Instrument [Line Items]            
Total long-term debt 325,000 186,700        
Variable-rate foreign bank loans            
Debt Instrument [Line Items]            
Total long-term debt 7,702 7,296        
Finance lease obligations            
Debt Instrument [Line Items]            
Total long-term debt 59,181 59,524        
Credit Facilities [Member]            
Debt Instrument [Line Items]            
Total long-term debt $ 223,900 $ 0