Guarantor and Non-Guarantor Condensed Consolidating Financial Statements (Statement of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 2,686	$ 2,733
Cash flows from investing activities
Net change in restricted cash and cash equivalents	284	107
Revenue earning equipment expenditures	(10,010)	(8,442)
Proceeds from disposal of revenue earning equipment	6,788	5,316
Capital asset expenditures, non-fleet	(250)	(232)
Proceeds from disposal of property and other equipment	69	67
Sales of (investment in) shares in equity method investment	100	(30)
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)	(69)
Advances to Hertz Global Holdings, Inc.	(270)	(28)
Repayments from Hertz Global Holdings, Inc.	0	25
Net cash provided by (used in) investing activities	(3,384)	(3,286)
Cash flows from financing activities
Proceeds from issuance of long-term debt	1,076	400
Repayments of long-term debt	(1,100)	(207)
Short-term borrowings:
Proceeds	543	528
Payments	(434)	(537)
Proceeds under the revolving lines of credit	5,906	4,018
Payments under the revolving lines of credit	(5,243)	(3,405)
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	(11)	(12)
Other	1	4
Net cash provided by (used in) financing activities	738	789
Effect of foreign exchange rate changes on cash and cash equivalents	(21)	(18)
Net change in cash and cash equivalents during the period	19	218
Cash and cash equivalents at beginning of period	490	411
Cash and cash equivalents at end of period	509	629
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(464)	(577)
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
Sales of (investment in) shares in equity method investment	0	0
Capital contributions to subsidiaries	2,006	953
Return of capital from subsidiaries	(3,767)	(1,093)
Loan to Parent / Guarantor from Non-Guarantor	684	228
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	(1,077)	88
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	(2,006)	(953)
Payment of dividends and return of capital	4,231	1,670
Loan to Parent / Guarantor from Non-Guarantor	(684)	(228)
Payment of financing costs	0	0
Other	0	0
Net cash provided by (used in) financing activities	1,541	489
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	340	363
Cash flows from investing activities
Net change in restricted cash and cash equivalents	9	53
Revenue earning equipment expenditures	(540)	(484)
Proceeds from disposal of revenue earning equipment	159	205
Capital asset expenditures, non-fleet	(51)	(24)
Proceeds from disposal of property and other equipment	13	10
Sales of (investment in) shares in equity method investment	0	0
Capital contributions to subsidiaries	0	(37)
Return of capital from subsidiaries	79	0
Loan to Parent / Guarantor from Non-Guarantor	0	(43)
Acquisitions, net of cash acquired	(3)	(24)
Advances to Hertz Global Holdings, Inc.	0	0
Repayments from Hertz Global Holdings, Inc.		0
Net cash provided by (used in) investing activities	(334)	(344)
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	(6)	(7)
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	(2)	(3)
Other	0	0
Net cash provided by (used in) financing activities	(8)	(10)
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	(2)	9
Cash and cash equivalents at beginning of period	14	6
Cash and cash equivalents at end of period	12	15
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,662)	(551)
Cash flows from investing activities
Net change in restricted cash and cash equivalents	27	(46)
Revenue earning equipment expenditures	(299)	(105)
Proceeds from disposal of revenue earning equipment	195	86
Capital asset expenditures, non-fleet	(124)	(121)
Proceeds from disposal of property and other equipment	35	30
Sales of (investment in) shares in equity method investment	0	0
Capital contributions to subsidiaries	(2,006)	(916)
Return of capital from subsidiaries	3,688	1,093
Loan to Parent / Guarantor from Non-Guarantor	0	0
Acquisitions, net of cash acquired	(17)	0
Advances to Hertz Global Holdings, Inc.	(270)	(28)
Repayments from Hertz Global Holdings, Inc.		25
Net cash provided by (used in) investing activities	1,229	18
Cash flows from financing activities
Proceeds from issuance of long-term debt	2	0
Repayments of long-term debt	(17)	(37)
Short-term borrowings:
Proceeds	0	0
Payments	0	0
Proceeds under the revolving lines of credit	1,482	2,220
Payments under the revolving lines of credit	(1,531)	(1,831)
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	684	185
Payment of financing costs	0	(2)
Other	0	4
Net cash provided by (used in) financing activities	620	539
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	187	6
Cash and cash equivalents at beginning of period	2	62
Cash and cash equivalents at end of period	189	68
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	4,472	3,498
Cash flows from investing activities
Net change in restricted cash and cash equivalents	248	100
Revenue earning equipment expenditures	(9,171)	(7,853)
Proceeds from disposal of revenue earning equipment	6,434	5,025
Capital asset expenditures, non-fleet	(75)	(87)
Proceeds from disposal of property and other equipment	21	27
Sales of (investment in) shares in equity method investment	100	(30)
Capital contributions to subsidiaries	0	0
Return of capital from subsidiaries	0	0
Loan to Parent / Guarantor from Non-Guarantor	(684)	(185)
Acquisitions, net of cash acquired	(75)	(45)
Advances to Hertz Global Holdings, Inc.	0	0
Repayments from Hertz Global Holdings, Inc.		0
Net cash provided by (used in) investing activities	(3,202)	(3,048)
Cash flows from financing activities
Proceeds from issuance of long-term debt	1,074	400
Repayments of long-term debt	(1,083)	(170)
Short-term borrowings:
Proceeds	543	528
Payments	(434)	(537)
Proceeds under the revolving lines of credit	4,424	1,798
Payments under the revolving lines of credit	(3,706)	(1,567)
Payments under the revolving lines of credit	2,006	953
Payment of dividends and return of capital	(4,231)	(1,670)
Loan to Parent / Guarantor from Non-Guarantor	0	43
Payment of financing costs	(9)	(7)
Other	1	0
Net cash provided by (used in) financing activities	(1,415)	(229)
Effect of foreign exchange rate changes on cash and cash equivalents	(21)	(18)
Net change in cash and cash equivalents during the period	(166)	203
Cash and cash equivalents at beginning of period	474	343
Cash and cash equivalents at end of period	$ 308	$ 546