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Fair Value Measurements (Tables)
12 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis
The following table presents information about the assets that are measured at fair value on a recurring basis as of June 30, 2012 and 2013 (in millions).
 
June 30, 2012
 

Level 1
 

Level 2
 

Level 3
United States short-term treasury bills
$
21.0

 
$
0.1

 
$
20.9

 
$

Corporate bonds
12.6

 

 
12.6

 

Common stock — domestic
10.1

 
0.1

 
10.0

 

Common stock — international
7.9

 
7.7

 
0.2

 

Preferred stock — international
0.2

 
0.2

 

 

Investments in securities
$
51.8

 
$
8.1

 
$
43.7

 
$


 
June 30, 2013
 

Level 1
 

Level 2
 

Level 3
Cash and cash equivalents
$
33.3

 
$
33.3

 
$

 
$

Corporate bonds
13.8

 

 
13.8

 

Common stock — domestic
12.0

 

 
12.0

 

Investments in securities
$
59.1

 
$
33.3

 
$
25.8

 
$

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
The following table provides a reconciliation of the beginning and ending balances for the year ended June 30, 2012 for those fair value measurements using significant Level 3 unobservable inputs for the Company's investment in auction rate securities ("ARS") previously included within investments in securities on the accompanying consolidated balance sheets (in millions).
 
Balance at June 30, 2011
 
Redemptions
 
Realized gain
on redemptions, pre tax
 
Change in
fair value,
pre tax
 
Balance at June 30, 2012
Auction rate securities
$
8.8

 
$
(10.0
)
 
$

 
$
1.2

 
$

Schedule of Available-for-sale Securities Activities
The following table provides a reconciliation of activity for the Company's investments in securities, excluding activity related to ARS as previously disclosed, for the years ended June 30, 2012 and 2013, respectively (in millions).
 
Fair value at June 30, 2011
 
Proceeds from sales
 
Purchases of securities
 
Realized gain on sales, pre tax
 
Change in fair value, pre tax
 
Fair value at June 30, 2012
Investments in securities
$
54.5

 
$
(75.3
)
 
$
73.5

 
$
0.1

 
$
(1.0
)
 
$
51.8

 
Fair value at June 30, 2012
 
Proceeds from sales
 
Purchases of securities
 
Realized gain (loss) on sales, pre tax
 
Change in fair value, pre tax
 
Fair value at June 30, 2013
Investment in securities
$
51.8

 
$
(76.2
)
 
$
79.1

 
$
(0.3
)
 
$
4.7

 
$
59.1

Schedule of Available-for-sale Securities Reconciliation
Supplemental information regarding the Company's available-for-sale investment securities held as of June 30, 2013 is set forth in the table below (in millions).
 
Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Fair Value
Cash and cash equivalents
$
33.3

 
$

 
$

 
$
33.3

Corporate bonds
11.3

 
2.5

 

 
13.8

Common stock - domestic
9.1

 
2.9

 

 
12.0

 
$
53.7

 
$
5.4

 
$

 
$
59.1