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Retirement Benefits (Schedule of Estimated Remaining Cash Contributions) (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Other Postretirement Benefit Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated future employer contributions in the currect fiscal year $ 2,026
United States | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated future employer contributions in the currect fiscal year
United Kingdom | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated future employer contributions in the currect fiscal year 173
Japan | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated future employer contributions in the currect fiscal year
Germany | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated future employer contributions in the currect fiscal year $ 271