Summary of Components of Current and Long-Term Accounts and Notes Receivable Net (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Current, net:
Accounts receivable	$ 109.9	$ 106.3
Notes receivable	181.7	183.4
Allowance for doubtful accounts	(7.2)	(6.9)
Current accounts and notes receivable, net	284.4	282.8
Long-term, net:
Notes receivable	103.4	122.3
Allowance for doubtful accounts	0	0
Long-term notes receivable, net	103.4	122.3
Total accounts and notes receivable, net	$ 387.8	$ 405.1

Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.

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