Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	$ 3,983,398	$ 3,600,654
Total other comprehensive income (loss), net of tax	(60,646)	(42,525)
Balance at end of period, net of tax	3,923,590	3,650,959
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	(68,911)	(183,453)
OCI before reclassifications	(59,924)	(42,895)
Other Comprehensive Income (Loss) before Reclassifications, Tax		0
Amounts reclassified from AOCI		0
Income taxes associated with amounts reclassified from AOCI		0
Total other comprehensive income (loss), net of tax	(59,924)	(42,895)
Balance at end of period, net of tax	(128,835)	(226,348)
Unrealized Gain (Loss) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	0	675
OCI before reclassifications	0	1,123
Other Comprehensive Income (Loss) before Reclassifications, Tax		(269)
Amounts reclassified from AOCI		(62)
Income taxes associated with amounts reclassified from AOCI		12
Total other comprehensive income (loss), net of tax	0	804
Balance at end of period, net of tax	0	1,479
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	364	1,171
OCI before reclassifications	0	0
Other Comprehensive Income (Loss) before Reclassifications, Tax		0
Amounts reclassified from AOCI		0
Income taxes associated with amounts reclassified from AOCI		0
Total other comprehensive income (loss), net of tax	0	0
Balance at end of period, net of tax	364	1,171
AOCI, net of tax, Attributable to THOR
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	(68,547)	(181,607)
OCI before reclassifications	(59,924)	(41,772)
Other Comprehensive Income (Loss) before Reclassifications, Tax		(269)
Amounts reclassified from AOCI		(62)
Income taxes associated with amounts reclassified from AOCI		12
Total other comprehensive income (loss), net of tax	(59,924)	(42,091)
Balance at end of period, net of tax	(128,471)	(223,698)
Non-controlling Interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	(2,583)	(2,205)
OCI before reclassifications	(722)	(434)
Other Comprehensive Income (Loss) before Reclassifications, Tax		0
Amounts reclassified from AOCI		0
Income taxes associated with amounts reclassified from AOCI		0
Total other comprehensive income (loss), net of tax	(722)	(434)
Balance at end of period, net of tax	(3,305)	(2,639)
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period, net of tax	(71,130)	(183,812)
OCI before reclassifications	(60,646)	(42,206)
Other Comprehensive Income (Loss) before Reclassifications, Tax		(269)
Amounts reclassified from AOCI		(62)
Income taxes associated with amounts reclassified from AOCI		12
Total other comprehensive income (loss), net of tax	(60,646)	(42,525)
Balance at end of period, net of tax	$ (131,776)	$ (226,337)