Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Debt (Details)

v3.10.0.1
Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Nov. 30, 2014
Debt Instrument      
Total debt, gross $ 2,250,000 $ 2,250,000  
Unamortized discount (2,343) (2,523)  
Unamortized debt issuance costs (9,279) (10,075)  
Total, net of discount 2,238,378 2,237,402  
Current portion of long-term debt 249,996 0  
Long-term debt $ 1,988,382 2,237,402  
Senior notes      
Debt Instrument      
Unamortized discount     $ (4,000)
Fixed-rate 3.375% Senior Notes due on November 1, 2019 | Senior notes      
Debt Instrument      
Stated interest rate 3.375%    
Total debt, gross $ 250,000 $ 250,000  
Effective interest rate 3.377% 3.377%  
Fixed-rate 4.125% Senior Notes due on November 1, 2021 | Senior notes      
Debt Instrument      
Stated interest rate 4.125%    
Total debt, gross $ 500,000 $ 500,000  
Effective interest rate 4.128% 4.128%  
Fixed-rate 4.650% Senior Notes due on November 1, 2024 | Senior notes      
Debt Instrument      
Stated interest rate [1] 4.65%    
Total debt, gross [1] $ 1,250,000 $ 1,250,000  
Effective interest rate [1] 4.682% 4.682%  
Fixed-rate 5.650% Senior Notes due on November 1, 2034 | Senior notes      
Debt Instrument      
Stated interest rate 5.65%    
Total debt, gross $ 250,000 $ 250,000  
Effective interest rate 5.67% 5.67%  
Portion of senior notes | Cash flow hedge contracts - foreign currency | Senior notes | Treasury lock | Derivatives designated as hedging instruments      
Debt Instrument      
Effective percentage including treasury rate lock hedge 4.626%    
[1] The effective interest rate disclosed above for this series of Senior Notes excludes the impact of the treasury rate lock hedge discussed below. The effective interest rate including the impact of the treasury rate lock hedge was 4.626%.