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Schedule of Segment Reporting Information by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 2,506,583 | $ 2,251,570 | $ 5,553,135 | $ 6,454,798
Income (loss) from continuing operations before income taxes | 41,523 | 180,525 | 74,913 | 508,681
Recreational vehicles |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 2,464,002 | 2,206,673 | 5,427,357 | 6,324,812
Operating Segments | Recreational vehicles |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 2,464,002 | 2,206,673 | 5,427,357 | 6,324,812
Income (loss) from continuing operations before income taxes | 97,953 | 186,761 | 245,480 | 537,464
Operating Segments | Recreational vehicles | North American [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 1,696,493 | 2,206,673 | 4,659,848 | 6,324,812
Income (loss) from continuing operations before income taxes | 128,900 | 186,761 | 276,427 | 537,464
Operating Segments | Recreational vehicles | European [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 767,509 | 0 | 767,509 | 0
Income (loss) from continuing operations before income taxes | (30,947) | 0 | (30,947) | 0
Operating Segments | Recreational vehicles | North American Towables |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 1,237,255 | 1,608,214 | 3,397,917 | 4,599,833
Income (loss) from continuing operations before income taxes | 103,715 | 147,853 | 212,325 | 423,432
Operating Segments | Recreational vehicles | North American Motorized |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 459,238 | 598,459 | 1,261,931 | 1,724,979
Income (loss) from continuing operations before income taxes | 25,185 | 38,908 | 64,102 | 114,032
Corporate and Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 69,506 | 82,239 | 198,468 | 233,171
Income (loss) from continuing operations before income taxes | 7,868 | 8,872 | 19,728 | 22,645
Intercompany Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | (26,925) | (37,342) | (72,690) | (103,185)
Corporate, Non-Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from continuing operations before income taxes | $ (64,298) | $ (15,108) | $ (190,295) | $ (51,428)

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