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Summary Of Significant Accounting Policies (Schedule Of Reclassification Of Assets And Equity Upon Adoption ASU 2016-16) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jul. 01, 2018
Jun. 30, 2018
Assets      
Prepaid expenses and other current assets $ 140,369   $ 124,634
Prepaid taxes and other non-current assets 138,098   273,710
Deferred income taxes 32,703   53,818
Equity      
Retained earnings $ 2,368,339   2,432,328
ASU 2016-16 [Member] | As Reported Balance [Member]      
Assets      
Prepaid expenses and other current assets     124,634
Prepaid taxes and other non-current assets     273,710
Deferred income taxes     53,818
Equity      
Retained earnings     $ 2,432,328
ASU 2016-16 [Member] | Adoption Of ASU 2016-16 Increase/(Decrease) [Member]      
Assets      
Prepaid expenses and other current assets   $ (28,947)  
Prepaid taxes and other non-current assets   (156,406)  
Deferred income taxes   (3,445)  
Equity      
Retained earnings   (188,798)  
ASU 2016-16 [Member] | Revised Balance [Member]      
Assets      
Prepaid expenses and other current assets   95,687  
Prepaid taxes and other non-current assets   117,304  
Deferred income taxes   50,373  
Equity      
Retained earnings   $ 2,243,530