Debt - Schedule of Facilities Available Net of Outstanding Letters of Credit (Details) $ in Millions	Jun. 30, 2026 USD ($)
Debt Instrument [Line Items]
Remaining Capacity	$ 2,992
Availability Under Borrowing Base Limitation	356
Non-Vehicle Debt
Debt Instrument [Line Items]
Remaining Capacity	356
Availability Under Borrowing Base Limitation	356
First Lien RCF
Debt Instrument [Line Items]
Remaining Capacity	356
Availability Under Borrowing Base Limitation	356
Vehicle Debt
Debt Instrument [Line Items]
Remaining Capacity	2,636
Availability Under Borrowing Base Limitation	0
HVF III Series 2021-A
Debt Instrument [Line Items]
Remaining Capacity	1,893
Availability Under Borrowing Base Limitation	0
European ABS
Debt Instrument [Line Items]
Remaining Capacity	538
Availability Under Borrowing Base Limitation	0
Hertz Canadian Securitization
Debt Instrument [Line Items]
Remaining Capacity	21
Availability Under Borrowing Base Limitation	0
Australian Securitization
Debt Instrument [Line Items]
Remaining Capacity	9
Availability Under Borrowing Base Limitation	0
New Zealand RCF
Debt Instrument [Line Items]
Remaining Capacity	5
Availability Under Borrowing Base Limitation	0
U.K. ABS
Debt Instrument [Line Items]
Remaining Capacity	164
Availability Under Borrowing Base Limitation	0
Other Vehicle Debt
Debt Instrument [Line Items]
Remaining Capacity	6
Availability Under Borrowing Base Limitation	$ 0