Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Additional Information (Details)

v3.10.0.1
Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2014
Oct. 31, 2014
Derivative          
Unamortized portion of the fair value of the forward contracts $ 4,400,000 $ 4,400,000      
Realized net loss $ 18,982,000 5,188,000      
2018 Rate lock agreements | Senior notes          
Derivative          
Realized net loss   $ 3,800,000      
Derivatives designated as hedging instruments | Cash flow hedge contracts - foreign currency | Portion of senior notes | Treasury lock | Senior notes          
Derivative          
Unrealized gains (losses) on cash flow hedges       $ 7,500,000  
Derivative, notional amount         $ 1,000,000,000.00
Derivatives designated as hedging instruments | Cash flow hedge contracts - foreign currency | 2018 Rate lock agreements | Treasury lock | Senior notes          
Derivative          
Derivative, notional amount     $ 500,000,000