Changes in Equity - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017	Sep. 27, 2017
Class Of Stock [Line Items]
Common stock shares repurchased, value	$ 63,581	$ 67,448	$ 100,433	$ 112,524
Stock Repurchase
Class Of Stock [Line Items]
Common Stock shares authorized for repurchase					6,828,855
Common Stock remaining shares authorized for repurchase	4,200,000		4,200,000
Common stock shares repurchased			2,300,000
Common stock shares repurchased, value			$ 100,433