Fair Value Measurement (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Broadcast rights payable	$ 16.9	$ 14.0
Long-term debt	250.0	195.0
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Broadcast rights payable	16.4	13.5
Long-term debt	$ 257.1	$ 205.1