Guarantor and Non-Guarantor Condensed Consolidating Financial Statements (Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,453	$ 1,406
Cash flows from investing activities
Net change in restricted cash and cash equivalents	144	143
Revenue earning equipment expenditures	(7,991)	(5,996)
Proceeds from disposal of revenue earning equipment	4,909	3,717
Capital asset expenditures, non-fleet	(170)	(151)
Proceeds from disposal of property and other equipment	47	45
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	(95)	(6)
Advances to Hertz Global Holdings, Inc.	(6)	(27)
Repayments from Hertz Global Holdings, Inc.	0	25
Net cash provided by (used in) investing activities	(3,162)	(2,250)
Cash flows from financing activities
Proceeds from issuance of long-term debt	1,069	414
Repayments of long-term debt	(1,032)	(97)
Short-term borrowings:
Proceeds	383	269
Payments	(258)	(369)
Proceeds under the revolving lines of credit	5,307	2,779
Payments under the revolving lines of credit	(3,688)	(2,017)
Payments under the revolving lines of credit	0	0
Payment of dividends and return of capital	0	0
Loan to Parent / Guarantor from Non-Guarantor	0	0
Payment of financing costs	(8)	(6)
Other	0	2
Net cash provided by (used in) financing activities	1,773	975
Effect of foreign exchange rate changes on cash and cash equivalents	(17)	(2)
Net change in cash and cash equivalents during the period	47	129
Cash and cash equivalents at beginning of period	490	411
Cash and cash equivalents at end of period	537	540
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(679)	(116)
Cash flows from investing activities
Net change in restricted cash and cash equivalents	0	0
Revenue earning equipment expenditures	0	0
Proceeds from disposal of revenue earning equipment	0	0
Capital asset expenditures, non-fleet	0	0
Proceeds from disposal of property and other equipment	0	0
Capital contributions to subsidiaries	1,544	495
Return of capital from subsidiaries	(2,080)	(804)
Loan to Parent / Guarantor from Non-Guarantor	506	230
Acquisitions, net of cash acquired	0	0
Advances to Hertz Global Holdings, Inc.	0	0
Repayments from Hertz Global Holdings, Inc.		0
Net cash provided by (used in) investing activities	(30)	(79)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Short-term borrowings:
Proceeds	0	0
Payments	0	0
Proceeds under the revolving lines of credit	0	0
Payments under the revolving lines of credit	0	0
Payments under the revolving lines of credit	(1,544)	(495)
Payment of dividends and return of capital	2,759	920
Loan to Parent / Guarantor from Non-Guarantor	(506)	(230)
Payment of financing costs	0	0
Other		0
Net cash provided by (used in) financing activities	709	195
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	224	218
Cash flows from investing activities
Net change in restricted cash and cash equivalents	12	54
Revenue earning equipment expenditures	(357)	(309)
Proceeds from disposal of revenue earning equipment	114	149
Capital asset expenditures, non-fleet	(23)	(15)
Proceeds from disposal of property and other equipment	5	5
Capital contributions to subsidiaries	0	(80)
Return of capital from subsidiaries	37	0
Loan to Parent / Guarantor from Non-Guarantor	0	0
Acquisitions, net of cash acquired	(3)	(2)
Advances to Hertz Global Holdings, Inc.	0	0
Repayments from Hertz Global Holdings, Inc.		0
Net cash provided by (used in) investing activities	(215)	(198)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Short-term borrowings:
Proceeds	0	0
Payments	0	0
Proceeds under the revolving lines of credit	0	0
Payments under the revolving lines of credit	(4)	(5)
Payments under the revolving lines of credit	0	0
Payment of dividends and return of capital	0	0
Loan to Parent / Guarantor from Non-Guarantor	0	0
Payment of financing costs	(1)	(3)
Other		0
Net cash provided by (used in) financing activities	(5)	(8)
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	4	12
Cash and cash equivalents at beginning of period	14	6
Cash and cash equivalents at end of period	18	18
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(810)	(1,274)
Cash flows from investing activities
Net change in restricted cash and cash equivalents	(60)	(7)
Revenue earning equipment expenditures	(298)	(89)
Proceeds from disposal of revenue earning equipment	160	62
Capital asset expenditures, non-fleet	(87)	(68)
Proceeds from disposal of property and other equipment	27	17
Capital contributions to subsidiaries	(1,544)	(415)
Return of capital from subsidiaries	2,043	804
Loan to Parent / Guarantor from Non-Guarantor	0	0
Acquisitions, net of cash acquired	(17)	0
Advances to Hertz Global Holdings, Inc.	(6)	(27)
Repayments from Hertz Global Holdings, Inc.		25
Net cash provided by (used in) investing activities	218	302
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	(11)	(10)
Short-term borrowings:
Proceeds	0	0
Payments	0	0
Proceeds under the revolving lines of credit	1,206	1,715
Payments under the revolving lines of credit	(970)	(895)
Payments under the revolving lines of credit	0	0
Payment of dividends and return of capital	0	0
Loan to Parent / Guarantor from Non-Guarantor	506	230
Payment of financing costs	0	0
Other		2
Net cash provided by (used in) financing activities	731	1,042
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	139	70
Cash and cash equivalents at beginning of period	2	62
Cash and cash equivalents at end of period	141	132
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	2,718	2,578
Cash flows from investing activities
Net change in restricted cash and cash equivalents	192	96
Revenue earning equipment expenditures	(7,336)	(5,598)
Proceeds from disposal of revenue earning equipment	4,635	3,506
Capital asset expenditures, non-fleet	(60)	(68)
Proceeds from disposal of property and other equipment	15	23
Capital contributions to subsidiaries	0	0
Return of capital from subsidiaries	0	0
Loan to Parent / Guarantor from Non-Guarantor	(506)	(230)
Acquisitions, net of cash acquired	(75)	(4)
Advances to Hertz Global Holdings, Inc.	0	0
Repayments from Hertz Global Holdings, Inc.		0
Net cash provided by (used in) investing activities	(3,135)	(2,275)
Cash flows from financing activities
Proceeds from issuance of long-term debt	1,069	414
Repayments of long-term debt	(1,021)	(87)
Short-term borrowings:
Proceeds	383	269
Payments	(258)	(369)
Proceeds under the revolving lines of credit	4,101	1,064
Payments under the revolving lines of credit	(2,714)	(1,117)
Payments under the revolving lines of credit	1,544	495
Payment of dividends and return of capital	(2,759)	(920)
Loan to Parent / Guarantor from Non-Guarantor	0	0
Payment of financing costs	(7)	(3)
Other		0
Net cash provided by (used in) financing activities	338	(254)
Effect of foreign exchange rate changes on cash and cash equivalents	(17)	(2)
Net change in cash and cash equivalents during the period	(96)	47
Cash and cash equivalents at beginning of period	474	343
Cash and cash equivalents at end of period	$ 378	$ 390