Debt (Narrative) (Details)		1 Months Ended		3 Months Ended		6 Months Ended
		Feb. 29, 2020 USD ($)	Feb. 25, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 CAD ($)	Jun. 30, 2020 AUD ($)	May 31, 2020 EUR (€)	May 31, 2020 CAD ($)	May 31, 2020 AUD ($)	Mar. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Income (loss) before income taxes				$ (1,044,000,000)	$ 44,000,000	$ (1,405,000,000)	$ (104,000,000)
Availability under borrowing base limitation				2,000,000		2,000,000
Assets	[1]			23,116,000,000		23,116,000,000								$ 24,627,000,000
Liabilities				22,443,000,000		22,443,000,000								22,739,000,000
HFLF Medium Term Notes
Debt Instrument [Line Items]
Availability under borrowing base limitation				0		0
European Vehicle Notes
Debt Instrument [Line Items]
Outstanding principal				813,000,000		813,000,000								810,000,000
Senior Notes, 7.125%, Due 2026
Debt Instrument [Line Items]
Outstanding principal				$ 500,000,000		$ 500,000,000								500,000,000
Interest rate				7.125%		7.125%		7.125%	7.125%
European Securitization
Debt Instrument [Line Items]
Availability under borrowing base limitation				$ 0		$ 0
UK Leveraged Financing
Debt Instrument [Line Items]
Debt instrument, face amount									$ 200,000,000			$ 250,000,000
New Zealand Revolving Credit Facility
Debt Instrument [Line Items]
Availability under borrowing base limitation				2,000,000		2,000,000
Canadian Securitization
Debt Instrument [Line Items]
Availability under borrowing base limitation				0		0
Debt instrument, face amount								$ 37,000,000			$ 50,000,000
Senior Assets Based Line of Credit Facility
Debt Instrument [Line Items]
Availability under borrowing base limitation				$ 0		0
Fixed charge coverage ratio, number of quarters				1 year
5.500% Senior Notes due October 2024
Debt Instrument [Line Items]
Outstanding principal				$ 800,000,000		$ 800,000,000								800,000,000
Interest rate				5.50%		5.50%		5.50%	5.50%
US Vehicle RCF
Debt Instrument [Line Items]
Availability under borrowing base limitation				$ 0		$ 0
Fleet Debt
Debt Instrument [Line Items]
Availability under borrowing base limitation				2,000,000		2,000,000
HFLF Series 2013-2 Notes
Debt Instrument [Line Items]
Debt instrument, increase (decrease), net		$ 100,000,000
HFLF Series 2013-2 Notes, Due March 2022
Debt Instrument [Line Items]
Outstanding principal				600,000,000		600,000,000
4.125% Senior Notes due October 2021
Debt Instrument [Line Items]
Outstanding principal				$ 252,000,000		$ 252,000,000								251,000,000
Interest rate				4.125%		4.125%		4.125%	4.125%
Senior Notes
Debt Instrument [Line Items]
Outstanding principal				$ 2,700,000,000		$ 2,700,000,000								2,700,000,000
HVF II Series 2013-A
Debt Instrument [Line Items]
Debt instrument, increase (decrease), net			$ 750,000,000
Outstanding principal			4,900,000,000
HVF II Series 2013-A Notes, Due March 2021
Debt Instrument [Line Items]
Outstanding principal			$ 200,000,000
European Fleet Notes, 5.500%, Due March 2023
Debt Instrument [Line Items]
Outstanding principal				$ 561,000,000		$ 561,000,000								559,000,000
Interest rate				5.50%		5.50%		5.50%	5.50%
Debt instrument, face amount | €										€ 600,000,000			€ 1,100,000,000
Australian Securitization
Debt Instrument [Line Items]
Availability under borrowing base limitation				$ 0		$ 0
Debt instrument, face amount									$ 210,000,000			$ 270,000,000
Letter of Credit
Debt Instrument [Line Items]
Outstanding standby letters of credit				746,000,000		746,000,000
Vehicles
Debt Instrument [Line Items]
Repayments of debt						4,613,000,000	5,254,000,000
Proceeds from issuance of debt						4,174,000,000	8,267,000,000
Non-vehicle
Debt Instrument [Line Items]
Outstanding principal				58,000,000		58,000,000								3,721,000,000
Repayments of debt						853,000,000	823,000,000
Proceeds from issuance of debt						1,498,000,000	$ 815,000,000
Non-vehicle | HFLF Medium Term Notes
Debt Instrument [Line Items]
Outstanding principal				1,044,000,000		1,044,000,000								1,375,000,000
Non-vehicle | European Vehicle Notes
Debt Instrument [Line Items]
Outstanding principal				813,000,000		813,000,000								810,000,000
Non-vehicle | European Securitization
Debt Instrument [Line Items]
Outstanding principal				624,000,000		624,000,000								766,000,000
Non-vehicle | UK Leveraged Financing
Debt Instrument [Line Items]
Outstanding principal				210,000,000		210,000,000								247,000,000
Non-vehicle | New Zealand Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding principal				45,000,000		45,000,000								50,000,000
Non-vehicle | Canadian Securitization
Debt Instrument [Line Items]
Outstanding principal				170,000,000		170,000,000								241,000,000
Non-vehicle | Senior RCF
Debt Instrument [Line Items]
Outstanding principal				0		0								0
Non-vehicle | Senior Term Loan
Debt Instrument [Line Items]
Outstanding principal				0		0								660,000,000
Non-vehicle | US Vehicle RCF
Debt Instrument [Line Items]
Outstanding principal				93,000,000		93,000,000								146,000,000
Non-vehicle | HFLF Series 2013-2 Notes
Debt Instrument [Line Items]
Outstanding principal				475,000,000		475,000,000								286,000,000
Non-vehicle | HFLF Series 2017-1
Debt Instrument [Line Items]
Outstanding principal				139,000,000		139,000,000								229,000,000
Non-vehicle | HFLF Series 2016-1
Debt Instrument [Line Items]
Outstanding principal				0		0								34,000,000
Non-vehicle | Senior Notes
Debt Instrument [Line Items]
Outstanding principal				0		0								2,700,000,000
Non-vehicle | HVF II Series 2013-A
Debt Instrument [Line Items]
Outstanding principal				4,148,000,000		4,148,000,000								2,644,000,000
Non-vehicle | HFLF Series 2018-1
Debt Instrument [Line Items]
Outstanding principal				353,000,000		353,000,000								462,000,000
Non-vehicle | Australian Securitization
Debt Instrument [Line Items]
Outstanding principal				137,000,000		137,000,000								177,000,000
Revolving Credit Facility | Senior RCF
Debt Instrument [Line Items]
Outstanding standby letters of credit				240,000,000		240,000,000
Letter of Credit
Debt Instrument [Line Items]
Availability under borrowing base limitation				299,000,000		299,000,000
Alternative Letter of Credit Facility
Debt Instrument [Line Items]
Availability under borrowing base limitation				200,000,000		$ 200,000,000
International Fleet Financing No. 2 B.V.
Debt Instrument [Line Items]
Ownership percentage						25.00%
Assets				870,000,000		$ 870,000,000								1,100,000,000
Liabilities				$ 870,000,000		$ 870,000,000								$ 1,100,000,000

[1] Hertz Global Holdings, Inc.'s consolidated total assets as of June 30, 2020 and December 31, 2019 include total assets of variable interest entities (“VIEs”) of $986 million and $1.3 billion, respectively, which can only be used to settle obligations of the VIEs. Hertz Global Holdings, Inc.'s consolidated total liabilities as of June 30, 2020 and December 31, 2019 include total liabilities of VIEs of $873 million and $1.1 billion, respectively, for which the creditors of the VIEs have no recourse to Hertz Global Holdings, Inc. See "Special Purpose Entities" in Note 5, "Debt," and "767 Auto Leasing LLC" in Note 13, "Related Party Transactions," for further information.