Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	$ 2,948,106	$ 2,345,569
Total other comprehensive income (loss), net of tax	(32,812)	(15,661)
Balance at end of period, net of tax	3,132,242	2,420,521
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	54,152	46,512
OCI before reclassifications	(35,007)	(19,106)
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	0
Amounts reclassified from AOCI	0	0
Income taxes associated with amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	(35,007)	(19,106)
Balance at end of period, net of tax	19,145	27,406
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	(8,655)	(18,823)
OCI before reclassifications	585	732
Other Comprehensive Income (Loss) before Reclassifications, Tax	(132)	(174)
Amounts reclassified from AOCI	2,528	3,639
Income taxes associated with amounts reclassified from AOCI	(626)	(865)
Total other comprehensive income (loss), net of tax	2,355	3,332
Balance at end of period, net of tax	(6,300)	(15,491)
Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	(876)	(696)
OCI before reclassifications	0	0
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	0
Amounts reclassified from AOCI	0	0
Income taxes associated with amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	0	0
Balance at end of period, net of tax	(876)	(696)
AOCI, net of tax, Attributable to THOR
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	44,621	26,993
OCI before reclassifications	(34,422)	(18,374)
Other Comprehensive Income (Loss) before Reclassifications, Tax	(132)	(174)
Amounts reclassified from AOCI	2,528	3,639
Income taxes associated with amounts reclassified from AOCI	(626)	(865)
Total other comprehensive income (loss), net of tax	(32,652)	(15,774)
Balance at end of period, net of tax	11,969	11,219
Non-controlling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	(772)	(855)
OCI before reclassifications	(160)	113
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	0
Amounts reclassified from AOCI	0	0
Income taxes associated with amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	(160)	113
Balance at end of period, net of tax	(932)	(742)
Total AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, net of tax	43,849	26,138
OCI before reclassifications	(34,582)	(18,261)
Other Comprehensive Income (Loss) before Reclassifications, Tax	(132)	(174)
Amounts reclassified from AOCI	2,528	3,639
Income taxes associated with amounts reclassified from AOCI	(626)	(865)
Total other comprehensive income (loss), net of tax	(32,812)	(15,661)
Balance at end of period, net of tax	$ 11,037	$ 10,477