Organization and Summary of Significant Accounting Policies - Reconciliation of Denominators of Basic and Diluted Earnings Per Share (Detail) - shares shares in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Weighted-average shares outstanding used to compute basic EPS	71.3	75.7	80.9
Effect of dilutive stock options	3.2	2.5	2.4
Weighted-average shares outstanding and dilutive securities used to compute diluted EPS	74.5	78.2	83.3