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Name:	dei_LegalEntityAxis=htzz_HertzGlobalMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=htzz_ShareLendingAgreementMember
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Debt - Schedule of Net Carrying Amount (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Debt Instrument [Line Items]
Non-cash PIK interest	$ 11	$ 11
Net carrying amount	19,080
The Hertz Corporation
Debt Instrument [Line Items]
Non-cash PIK interest	11	$ 11
Exchangeable Notes Due 2029
Debt Instrument [Line Items]
Unamortized discounts associated with the Exchange Features	(3)		$ (4)
Net carrying amount	282
Exchangeable Notes Due 2029 \| Senior Notes
Debt Instrument [Line Items]
Principal	250		250
Non-cash PIK interest	32		21
Unamortized debt discounts and debt issuance costs	(10)		(12)
Unamortized discounts associated with the Exchange Features	(64)		(67)
Fair value of the Exchange Features	26		78
Net carrying amount	234		270
Exchangeable Notes Due 2030
Debt Instrument [Line Items]
Net carrying amount	425
Exchangeable Notes Due 2030 \| Senior Notes
Debt Instrument [Line Items]
Principal	425		425
Unamortized debt discounts and debt issuance costs	(18)		(20)
Unamortized discounts associated with the Exchange Features	(91)		(99)
Fair value of the Exchange Features	21		54
Net carrying amount	337		360
Exchangeable First Lien Notes Due 2030
Debt Instrument [Line Items]
Net carrying amount	350
Exchangeable First Lien Notes Due 2030 \| Senior Notes
Debt Instrument [Line Items]
Principal	350
Unamortized debt discounts and debt issuance costs	(12)
Unamortized discounts associated with the Exchange Features	(115)
Fair value of the Exchange Features	110
Exchangeable First Lien Notes Due 2030 \| Senior Notes \| The Hertz Corporation
Debt Instrument [Line Items]
Net carrying amount	333
Exchangeable First Lien Notes Due 2030 \| Senior Notes \| Hertz Global
Debt Instrument [Line Items]
Net carrying amount	248
Share Lending Agreement
Debt Instrument [Line Items]
Unamortized debt issuance costs	(85)		$ 0
Share Lending Agreement \| Senior Notes
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (85)