Guarantor and Non-Guarantor Condensed Consolidating Financial Statements (Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		$ 2,051	$ 2,265
Cash flows from investing activities:
Net change in restricted cash and cash equivalents		9	278
Revenue earning vehicles expenditures		(9,250)	(9,478)
Proceeds from disposal of revenue earning vehicles		6,960	6,666
Capital asset expenditures, non-vehicle		(99)	(183)
Proceeds from disposal of property and other equipment		53	64
Purchases of shares in equity method investment	$ (45)	(45)	0
Sales of shares in equity method investment		233	100
Capital contributions to subsidiaries		0	0
Return of capital from subsidiaries		0	0
Loan to Parent / Guarantor from Non-Guarantor		0	0
Acquisitions, net of cash acquired		0	(95)
Advances to Old Hertz Holdings		0	(270)
Net cash provided by (used in) investing activities from continuing operations		(2,139)	(2,918)
Cash flows from financing activities:
Proceeds from issuance of vehicle debt		7,665	6,069
Repayments of vehicle debt		(7,320)	(5,223)
Proceeds from issuance of non-vehicle debt		2,427	1,457
Repayments of non-vehicle debt		(3,684)	(1,547)
Capital contributions received from parent		0	0
Loan to Parent / Guarantor from Non-Guarantor		0	0
Payment of dividends and return of capital		0	0
Payment of financing costs		(73)	(11)
Early redemption premium payment		(13)	0
Transfers (to) from discontinued entities		2,122	(42)
Advances to Hertz Global		(100)	0
Other		10
Net cash provided by (used in) financing activities		1,034	703
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		10	(19)
Net increase (decrease) in cash and cash equivalents during the period from continuing operations		956	31
Cash and cash equivalents at beginning of period		474	474
Cash and cash equivalents at end of period		1,430	505
Cash flows provided by (used in) operating activities		207	421
Cash flows provided by (used in) investing activities		(77)	(466)
Cash flows provided by (used in) financing activities		(94)	35
Effect of foreign exchange rate changes on cash and cash equivalents		0	(2)
Net increase (decrease) in cash and cash equivalents during the period from discontinued operations		36	(12)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		(719)	(464)
Cash flows from investing activities:
Net change in restricted cash and cash equivalents		0	0
Revenue earning vehicles expenditures		0	0
Proceeds from disposal of revenue earning vehicles		0	0
Capital asset expenditures, non-vehicle		0	0
Proceeds from disposal of property and other equipment		0	0
Purchases of shares in equity method investment		0
Sales of shares in equity method investment		0	0
Capital contributions to subsidiaries		1,260	2,006
Return of capital from subsidiaries		(2,516)	(3,767)
Loan to Parent / Guarantor from Non-Guarantor		973	684
Acquisitions, net of cash acquired			0
Advances to Old Hertz Holdings			0
Net cash provided by (used in) investing activities from continuing operations		(283)	(1,077)
Cash flows from financing activities:
Proceeds from issuance of vehicle debt		0	0
Repayments of vehicle debt		0	0
Proceeds from issuance of non-vehicle debt		0	0
Repayments of non-vehicle debt		0	0
Capital contributions received from parent		(1,260)	(2,006)
Loan to Parent / Guarantor from Non-Guarantor		(973)	(684)
Payment of dividends and return of capital		3,235	4,231
Payment of financing costs		0	0
Early redemption premium payment		0
Transfers (to) from discontinued entities		0	0
Advances to Hertz Global		0
Other		0
Net cash provided by (used in) financing activities		1,002	1,541
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		0	0
Net increase (decrease) in cash and cash equivalents during the period from continuing operations		0	0
Cash and cash equivalents at beginning of period		0	0
Cash and cash equivalents at end of period		0	0
Cash flows provided by (used in) operating activities		0	0
Cash flows provided by (used in) investing activities		0	0
Cash flows provided by (used in) financing activities		0	0
Effect of foreign exchange rate changes on cash and cash equivalents			0
Net increase (decrease) in cash and cash equivalents during the period from discontinued operations		0	0
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		(2,129)	(1,662)
Cash flows from investing activities:
Net change in restricted cash and cash equivalents		(36)	27
Revenue earning vehicles expenditures		(285)	(299)
Proceeds from disposal of revenue earning vehicles		219	195
Capital asset expenditures, non-vehicle		(56)	(124)
Proceeds from disposal of property and other equipment		29	35
Purchases of shares in equity method investment		(45)
Sales of shares in equity method investment		0	0
Capital contributions to subsidiaries		(1,260)	(2,006)
Return of capital from subsidiaries		2,516	3,688
Loan to Parent / Guarantor from Non-Guarantor		0	0
Acquisitions, net of cash acquired			(17)
Advances to Old Hertz Holdings			(270)
Net cash provided by (used in) investing activities from continuing operations		1,082	1,229
Cash flows from financing activities:
Proceeds from issuance of vehicle debt		442	25
Repayments of vehicle debt		(433)	0
Proceeds from issuance of non-vehicle debt		2,427	1,457
Repayments of non-vehicle debt		(3,684)	(1,546)
Capital contributions received from parent		0	0
Loan to Parent / Guarantor from Non-Guarantor		973	684
Payment of dividends and return of capital		(1)	0
Payment of financing costs		(45)	0
Early redemption premium payment		(13)
Transfers (to) from discontinued entities		2,122	0
Advances to Hertz Global		(100)
Other		10
Net cash provided by (used in) financing activities		1,698	620
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		0	0
Net increase (decrease) in cash and cash equivalents during the period from continuing operations		651	187
Cash and cash equivalents at beginning of period		179	2
Cash and cash equivalents at end of period		830	189
Cash flows provided by (used in) operating activities		0	0
Cash flows provided by (used in) investing activities		0	0
Cash flows provided by (used in) financing activities		0	0
Effect of foreign exchange rate changes on cash and cash equivalents			0
Net increase (decrease) in cash and cash equivalents during the period from discontinued operations		0	0
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		61	(57)
Cash flows from investing activities:
Net change in restricted cash and cash equivalents		0	3
Revenue earning vehicles expenditures		(62)	(87)
Proceeds from disposal of revenue earning vehicles		11	70
Capital asset expenditures, non-vehicle		(13)	(2)
Proceeds from disposal of property and other equipment		2	12
Purchases of shares in equity method investment		0
Sales of shares in equity method investment		0	0
Capital contributions to subsidiaries		0	0
Return of capital from subsidiaries		0	79
Loan to Parent / Guarantor from Non-Guarantor		0	0
Acquisitions, net of cash acquired			(3)
Advances to Old Hertz Holdings			0
Net cash provided by (used in) investing activities from continuing operations		(62)	72
Cash flows from financing activities:
Proceeds from issuance of vehicle debt		0	0
Repayments of vehicle debt		0	0
Proceeds from issuance of non-vehicle debt		0	0
Repayments of non-vehicle debt		0	0
Capital contributions received from parent		0	0
Loan to Parent / Guarantor from Non-Guarantor		0	0
Payment of dividends and return of capital		0	0
Payment of financing costs		(3)	(2)
Early redemption premium payment		0
Transfers (to) from discontinued entities		0	(6)
Advances to Hertz Global		0
Other		0
Net cash provided by (used in) financing activities		(3)	(8)
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		0	0
Net increase (decrease) in cash and cash equivalents during the period from continuing operations		(4)	7
Cash and cash equivalents at beginning of period		17	10
Cash and cash equivalents at end of period		13	17
Cash flows provided by (used in) operating activities		59	397
Cash flows provided by (used in) investing activities		(75)	(406)
Cash flows provided by (used in) financing activities		44	0
Effect of foreign exchange rate changes on cash and cash equivalents			0
Net increase (decrease) in cash and cash equivalents during the period from discontinued operations		28	(9)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		4,838	4,448
Cash flows from investing activities:
Net change in restricted cash and cash equivalents		45	248
Revenue earning vehicles expenditures		(8,903)	(9,092)
Proceeds from disposal of revenue earning vehicles		6,730	6,401
Capital asset expenditures, non-vehicle		(30)	(57)
Proceeds from disposal of property and other equipment		22	17
Purchases of shares in equity method investment		0
Sales of shares in equity method investment		233	100
Capital contributions to subsidiaries		0	0
Return of capital from subsidiaries		0	0
Loan to Parent / Guarantor from Non-Guarantor		(973)	(684)
Acquisitions, net of cash acquired			(75)
Advances to Old Hertz Holdings			0
Net cash provided by (used in) investing activities from continuing operations		(2,876)	(3,142)
Cash flows from financing activities:
Proceeds from issuance of vehicle debt		7,223	6,044
Repayments of vehicle debt		(6,887)	(5,223)
Proceeds from issuance of non-vehicle debt		0	0
Repayments of non-vehicle debt		0	(1)
Capital contributions received from parent		1,260	2,006
Loan to Parent / Guarantor from Non-Guarantor		0	0
Payment of dividends and return of capital		(3,234)	(4,231)
Payment of financing costs		(25)	(9)
Early redemption premium payment		0
Transfers (to) from discontinued entities		0	(36)
Advances to Hertz Global		0
Other		0
Net cash provided by (used in) financing activities		(1,663)	(1,450)
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		10	(19)
Net increase (decrease) in cash and cash equivalents during the period from continuing operations		309	(163)
Cash and cash equivalents at beginning of period		278	462
Cash and cash equivalents at end of period		587	299
Cash flows provided by (used in) operating activities		148	24
Cash flows provided by (used in) investing activities		(2)	(60)
Cash flows provided by (used in) financing activities		(138)	35
Effect of foreign exchange rate changes on cash and cash equivalents			(2)
Net increase (decrease) in cash and cash equivalents during the period from discontinued operations		$ 8	$ (3)