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Postretirement Benefits (Tables) (Postretirement Benefits [Member])
 9 Months Ended
Mar. 31, 2014
Postretirement Benefits [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Components Of Net Periodic Benefit Cost
The following table summarizes the components of net periodic benefit cost for our postretirement plans:
 
 
Three Months Ended 
 March 31,
 
Nine Months Ended 
 March 31,
 
2014
 
2013
 
2014
 
2013
Components of net periodic benefit cost
 
 
 
 
 
 
 
Service cost
$
8

 
$
8

 
$
24

 
$
24

Interest cost
33

 
28

 
97

 
84

Amortization of unrecognized net gain
(6
)
 
(6
)
 
(20
)
 
(16
)
Amortization of prior service asset
(1
)
 
(1
)
 
(3
)
 
(3
)
Net periodic benefit cost
$
34

 
$
29

 
$
98

 
$
89