Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 44,767	$ 64,883	$ 186,475	$ 209,416
Foreign currency translation adjustments	(37,220)	18,577	(15,510)	(46,982)
Postretirement medical benefits, net of tax	(2,565)	0	6,380	0
Unrealized (loss) gain on derivative instruments, net of tax	(710)	1,339	707	(1,642)
Unrealized investment gain (loss), net of tax	543	88	(36)	(2,263)
Other comprehensive (loss) income	(39,952)	20,004	(8,459)	(50,887)
Total comprehensive income	$ 4,815	$ 84,887	$ 178,016	$ 158,529