Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 4,061,956	$ 3,923,590	$ 4,074,053	$ 3,983,398
Total other comprehensive income (loss), net of tax	(79,482)	35,516	(67,539)	(25,130)
Ending balance	3,953,495	3,942,595	3,953,495	3,942,595
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(82,083)	(128,835)	(93,984)	(68,911)
OCI before reclassifications	(76,115)	35,688	(64,214)	(24,236)
Total other comprehensive income (loss), net of tax	(76,115)	35,688	(64,214)	(24,236)
Ending balance	(158,198)	(93,147)	(158,198)	(93,147)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	278	364	278	364
OCI before reclassifications	0	(111)	0	(111)
Total other comprehensive income (loss), net of tax	0	(111)	0	(111)
Ending balance	278	253	278	253
AOCI, net of tax, Attributable to THOR
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(81,805)	(128,471)	(93,706)	(68,547)
OCI before reclassifications	(76,115)	35,577	(64,214)	(24,347)
Total other comprehensive income (loss), net of tax	(76,115)	35,577	(64,214)	(24,347)
Ending balance	(157,920)	(92,894)	(157,920)	(92,894)
Non-controlling Interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,393)	(3,305)	(3,435)	(2,583)
OCI before reclassifications	(3,367)	(61)	(3,325)	(783)
Total other comprehensive income (loss), net of tax	(3,367)	(61)	(3,325)	(783)
Ending balance	(6,760)	(3,366)	(6,760)	(3,366)
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(85,198)	(131,776)	(97,141)	(71,130)
OCI before reclassifications	(79,482)	35,516	(67,539)	(25,130)
Total other comprehensive income (loss), net of tax	(79,482)	35,516	(67,539)	(25,130)
Ending balance	$ (164,680)	$ (96,260)	$ (164,680)	$ (96,260)