Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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+ Details

Earnings Per Share (Narrative) (Detail) (USD $)	3 Months Ended
Earnings Per Share (Narrative) (Detail) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock outstanding and not included in the computation of diluted earnings per share	1,535,060	1,438,471
Convertible Senior Notes, outstanding	$ 400,000,000		$ 400,000,000
Initial conversion price of the Convertible Senior Notes	$ 104
Amount of Convertible Senior Notes	1,000
Convertible Senior Notes [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Convertible Senior Notes, outstanding	400,000,000
Convertible Senior Notes, interest rate	1.25%
Debt instrument, maturity date	Oct. 15, 2012
Amount of Convertible Senior Notes	$ 1,000
Restricted Shares And Restricted Stock Units [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock outstanding and not included in the computation of diluted earnings per share	189,541	3,969