Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income attributable to common shareholders									$ 806,840	$ 1,012,140	$ 1,041,048
Denominator:
Basic - weighted-average common shares									135,353,321	142,925,327	149,099,448
Increase in weighted-average common shares from dilutive effect of stock-based awards									1,558,369	2,186,823	2,344,655
Diluted - weighted-average common shares, assuming exercise of stock-based awards									136,911,690	145,112,150	151,444,103
Basic earnings per share									$ 5.96	$ 7.08	$ 6.98
Diluted earnings per share	$ 1.77	$ 1.37	$ 1.33	$ 1.41	$ 1.27	$ 2.02	$ 1.80	$ 1.85	$ 5.89	$ 6.97	$ 6.87