(Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 783	$ 760
Cash flows from investing activities
Net change in restricted cash and cash equivalents	154	407
Revenue earning equipment expenditures	(3,438)	(2,582)
Proceeds from disposal of revenue earning equipment	2,289	1,859
Capital asset expenditures, non-fleet	(97)	(75)
Proceeds from disposal of property and equipment	22	25
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	(96)	(6)
Repayments of loans with Hertz Global Holdings, Inc.	(5)	(14)
Net cash used in investing activities	(1,171)	(386)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	400
Repayments of long-term debt	(1,027)	(92)
Short-term borrowings:
Proceeds	175	169
Payments	(142)	(259)
Proceeds under the revolving lines of credit	3,326	1,081
Payments under the revolving lines of credit	(1,828)	(1,582)
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	(1)	(7)
Other	0	3
Net cash provided by (used in) financing activities	503	(287)
Effect of foreign exchange rate changes on cash and cash equivalents	(20)	0
Net change in cash and cash equivalents during the period	95	87
Cash and cash equivalents at beginning of period	490	411
Cash and cash equivalents at end of period	585	498
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(665)	(178)
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 equipment	0	0
Capital contributions to subsidiaries	713	451
Return of capital from subsidiaries	(452)	(436)
Loan to Parent / Guarantor from Non-Guarantor	432	1
Acquisitions, net of cash acquired	0	0
Repayments of loans with Hertz Global Holdings, Inc.	0	0
Net cash used in investing activities	693	16
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
Capital contributions received from parent	(713)	(451)
Loan to Parent / Guarantor from Non-Guarantor	(432)	(1)
Payment of dividends and return of capital	1,117	614
Payment of financing costs	0	0
Other		0
Net cash provided by (used in) financing activities	(28)	162
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
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	179	30
Cash flows from investing activities
Net change in restricted cash and cash equivalents	(67)	(96)
Revenue earning equipment expenditures	(234)	(30)
Proceeds from disposal of revenue earning equipment	75	22
Capital asset expenditures, non-fleet	(36)	(30)
Proceeds from disposal of property and equipment	14	6
Capital contributions to subsidiaries	(713)	(414)
Return of capital from subsidiaries	452	436
Loan to Parent / Guarantor from Non-Guarantor	0	0
Acquisitions, net of cash acquired	(18)	0
Repayments of loans with Hertz Global Holdings, Inc.	(5)	(14)
Net cash used in investing activities	(532)	(120)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	(6)	(5)
Short-term borrowings:
Proceeds	0	0
Payments	0	0
Proceeds under the revolving lines of credit	656	669
Payments under the revolving lines of credit	(610)	(590)
Capital contributions received from parent	0	0
Loan to Parent / Guarantor from Non-Guarantor	432	(42)
Payment of dividends and return of capital	0	0
Payment of financing costs	0	0
Other		3
Net cash provided by (used in) financing activities	472	35
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	119	(55)
Cash and cash equivalents at beginning of period	2	62
Cash and cash equivalents at end of period	121	7
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(2)	115
Cash flows from investing activities
Net change in restricted cash and cash equivalents	12	54
Revenue earning equipment expenditures	(51)	(130)
Proceeds from disposal of revenue earning equipment	69	68
Capital asset expenditures, non-fleet	(15)	(7)
Proceeds from disposal of property and equipment	2	4
Capital contributions to subsidiaries	0	(37)
Return of capital from subsidiaries	0	0
Loan to Parent / Guarantor from Non-Guarantor	0	(43)
Acquisitions, net of cash acquired	(5)	(2)
Repayments of loans with Hertz Global Holdings, Inc.	0	0
Net cash used in investing activities	12	(93)
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	(2)	(2)
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	0	(2)
Other		0
Net cash provided by (used in) financing activities	(2)	(4)
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Net change in cash and cash equivalents during the period	8	18
Cash and cash equivalents at beginning of period	14	6
Cash and cash equivalents at end of period	22	24
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,271	793
Cash flows from investing activities
Net change in restricted cash and cash equivalents	209	449
Revenue earning equipment expenditures	(3,153)	(2,422)
Proceeds from disposal of revenue earning equipment	2,145	1,769
Capital asset expenditures, non-fleet	(46)	(38)
Proceeds from disposal of property and equipment	6	15
Capital contributions to subsidiaries	0	0
Return of capital from subsidiaries	0	0
Loan to Parent / Guarantor from Non-Guarantor	(432)	42
Acquisitions, net of cash acquired	(73)	(4)
Repayments of loans with Hertz Global Holdings, Inc.	0	0
Net cash used in investing activities	(1,344)	(189)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	400
Repayments of long-term debt	(1,021)	(87)
Short-term borrowings:
Proceeds	175	169
Payments	(142)	(259)
Proceeds under the revolving lines of credit	2,670	412
Payments under the revolving lines of credit	(1,216)	(990)
Capital contributions received from parent	713	451
Loan to Parent / Guarantor from Non-Guarantor	0	43
Payment of dividends and return of capital	(1,117)	(614)
Payment of financing costs	(1)	(5)
Other		0
Net cash provided by (used in) financing activities	61	(480)
Effect of foreign exchange rate changes on cash and cash equivalents	(20)	0
Net change in cash and cash equivalents during the period	(32)	124
Cash and cash equivalents at beginning of period	474	343
Cash and cash equivalents at end of period	$ 442	$ 467