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Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs and Net (Discount) Premium	$ (330)		$ (231)
Total Debt - Hertz Global	17,911		17,054
The Hertz Corporation
Debt Instrument [Line Items]
Total Debt - Hertz Global	17,993		17,054
Hertz Global
Debt Instrument [Line Items]
Total Debt - Hertz Global	17,911		17,054
Non-Vehicle Debt
Debt Instrument [Line Items]
Total Debt - Hertz Global	5,953		5,425
Non-Vehicle Debt \| The Hertz Corporation
Debt Instrument [Line Items]
Total Debt - Hertz Global	6,035		5,425
Non-Vehicle Debt \| Hertz Global
Debt Instrument [Line Items]
Total Debt - Hertz Global	$ 5,953		5,425
Term B Loan \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	7.58%
Outstanding principal	$ 1,232		1,242
Incremental Term B Loan \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	7.57%
Outstanding principal	$ 486		490
Term C Loan \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	7.58%
Outstanding principal	$ 245		245
First Lien Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	12.63%
Outstanding principal	$ 1,250		1,250
Exchangeable First Lien Notes Due 2030
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 14
Exchangeable First Lien Notes Due 2030 \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.75%
Outstanding principal	$ 380		0
Unamortized debt issuance costs	$ (14)
Effective interest rate	17.50%
Unamortized debt discount	$ 118	$ 115
Exchangeable Notes Due 2029
Debt Instrument [Line Items]
Unamortized debt issuance costs	6		8
Unamortized debt discount	$ 4		4
Exchangeable Notes Due 2029 \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	8.00%
Outstanding principal	$ 294		$ 271
Effective interest rate	17.00%		16.40%
Unamortized debt discount	$ 61		$ 67
Exchangeable Notes Due 2030
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 17		20
Exchangeable Notes Due 2030 \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.50%
Outstanding principal	$ 425		$ 425
Effective interest rate	12.00%		12.00%
Unamortized debt discount	$ 87		$ 99
Senior Notes Due 2026 \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	4.63%
Outstanding principal	$ 199		200
Redemption of aggregate principal outstanding			300
Senior Notes Due 2029 \| Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.00%
Outstanding principal	$ 1,000		1,000
Other Non-Vehicle Debt
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	7.48%
Outstanding principal	$ 12		6
Fair Value of the Exchange Features 2029
Debt Instrument [Line Items]
Outstanding principal	13		78
Unamortized debt discount	83		79
Fair Value of the Exchange Feature 2030
Debt Instrument [Line Items]
Outstanding principal	11		54
Unamortized debt discount	103		103
Fair Value of the First Lien Exchangeable Feature
Debt Instrument [Line Items]
Outstanding principal	68		0
Unamortized debt discount	123
Vehicle Debt
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs and Net (Discount) Premium	(69)		(50)
Total Debt - Hertz Global	11,958		11,629
HVF III U.S. Vehicle Variable Funding Notes
Debt Instrument [Line Items]
Outstanding principal	$ 1,177		1,537
HVF III Series 2021-A Class A
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.43%
Outstanding principal	$ 877		1,237
HVF III Series 2021-A Class B
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	9.28%
Outstanding principal	$ 300		300
HVF III U.S. Vehicle Medium Term Notes
Debt Instrument [Line Items]
Outstanding principal	$ 8,822		8,349
HVF III Series 2021-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	2.12%
Outstanding principal	$ 1,000		2,000
HVF III Series 2022-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	2.78%
Outstanding principal	$ 750		750
HVF III Series 2022-5 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	4.67%
Outstanding principal	$ 381		364
HVF III Series 2023-1 \| Medium-term Notes
Debt Instrument [Line Items]
Outstanding principal	$ 0		500
HVF III Series 2023-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.52%
Outstanding principal	$ 314		300
HVF III Series 2023-3 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.46%
Outstanding principal	$ 417		500
HVF III Series 2023-4 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.88%
Outstanding principal	$ 524		500
HVF III Series 2024-1 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.21%
Outstanding principal	$ 393		375
HVF III Series 2024-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.31%
Outstanding principal	$ 393		375
HVF III Series 2025-1 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.62%
Outstanding principal	$ 524		500
HVF III Series 2025-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.92%
Outstanding principal	$ 524		500
HVF III Series 2025-3 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.81%
Outstanding principal	$ 393		375
HVF III Series 2025-4 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.21%
Outstanding principal	$ 325		310
HVF III Series 2025-5 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.32%
Outstanding principal	$ 472		450
HVF III Series 2025-6 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.65%
Outstanding principal	$ 577		550
HVF III Series 2026-1 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.74%
Outstanding principal	$ 500		0
HVF III Series 2026-2 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.12%
Outstanding principal	$ 500		0
HVF III Series 2026-3 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.10%
Outstanding principal	$ 358		0
HVF III Series 2026-4 \| Medium-term Notes
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.53%
Outstanding principal	$ 477		0
Vehicle Debt - Other
Debt Instrument [Line Items]
Outstanding principal	$ 2,028		1,793
European ABS
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	4.89%
Outstanding principal	$ 1,047		965
Hertz Canadian Securitization
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	4.07%
Outstanding principal	$ 406		307
Australian Securitization
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.00%
Outstanding principal	$ 236		228
New Zealand RCF
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.79%
U.K. ABS
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.56%
Outstanding principal	$ 137		109
Other Vehicle Debt
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	6.21%
Outstanding principal	$ 140		120
Finance lease liability	100		105
Share Lending Agreement
Debt Instrument [Line Items]
Unamortized debt issuance costs	(82)		0
Share Lending Agreement \| Senior Notes
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (82)
Revolving Credit Facility \| First Lien RCF \| Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	7.42%
Outstanding principal	$ 750		395
Revolving Credit Facility \| New Zealand RCF \| Line of Credit
Debt Instrument [Line Items]
Outstanding principal	$ 62		$ 64