Accounts receivable, net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Accounts receivable, net [Line Items]
Accounts receivable, trade	$ 1,792,010	$ 1,792,961
Allowance for doubtful accounts	(11,363)	(10,518)
Non-trade accounts receivable	92,097	84,872
Notes receivable	109,846	124,969
Total	$ 1,982,590	$ 1,992,284