Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Foreign Currency Forward Contract - Additional Information (Detail) $ in Thousands, € in Millions		1 Months Ended		3 Months Ended	6 Months Ended
	Sep. 18, 2018 EUR (€)	Jan. 31, 2019 EUR (€)	Jan. 31, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)
Intercompany Foreign Currency Balance [Line Items]
Foreign currency forward contract liability						$ 73,707
Erwin Hymer Group
Intercompany Foreign Currency Balance [Line Items]
Payments to acquire business	€ 1,700	€ 1,500	$ 1,700,000
Foreign currency forward contract liability \| €		€ 1,625
Foreign currency gain (loss)				$ (31,152)	$ (73,707)
Erwin Hymer Group \| Level 2
Intercompany Foreign Currency Balance [Line Items]
Foreign currency forward contract liability						$ 73,707