CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Cash flows from operating activities:
Net loss	$ (52,111)	$ (134,948)	$ (363)	$ (95,856)	$ (1,185,738)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation of revenue earning equipment	809,433	881,540	1,789,903	1,849,674	2,085,665
Depreciation of property and equipment	77,140	78,571	154,031	159,693	172,848
Amortization of other intangible assets	33,679	32,700	64,713	66,059	66,282
Amortization and write-off of deferred financing costs	63,102	37,361	70,825	57,471	70,193
Amortization and write-off of debt discount	11,914	11,526	20,968	27,742	17,908
Stock-based compensation charges	16,630	19,308	36,560	35,464	28,023
(Gain) loss on derivatives	(2,203)	5,047	10,810	(1,552)	22,938
Amortization and ineffectiveness of cash flow hedges		38,868	68,815	74,597	11,807
Provision for losses on doubtful accounts	14,313	10,295	19,667	27,951	31,068
Asset writedowns	23,311	14,215	20,448	36,063	93,211
Deferred taxes on income	(21,441)	(12,976)	(19,471)	117,374	(235,913)
Gain on sale of property and equipment	(4,748)	(2,176)	(5,740)	(1,072)	(9,602)
Changes in assets and liabilities, net of effects of acquisition:
Receivables	(187,818)	(101,157)	(3,145)	34,539	46,887
Inventories, prepaid expenses and other assets	(57,831)	(25,495)	(61,871)	7,554	17,934
Accounts payable	138,214	254,809	118,011	(227,479)	108,530
Accrued liabilities	(179,257)	(69,493)	(53,457)	(181,452)	(54,223)
Accrued taxes	21,667	(7,116)	10,281	(201,902)	(101)
Public liability and property damage	(4,393)	252	(3,058)	(34,536)	(20,068)
Net cash provided by operating activities	699,601	1,031,131	2,237,927	1,701,860	2,436,549
Cash flows from investing activities:
Net change in restricted cash and cash equivalents	(60,233)	(389,242)	160,516	368,721	(71,836)
Revenue earning equipment expenditures	(5,466,856)	(5,317,298)	(8,440,872)	(7,527,317)	(10,150,982)
Proceeds from disposal of revenue earning equipment	3,488,890	3,443,510	7,518,446	6,106,624	8,619,715
Property and equipment expenditures	(125,370)	(92,018)	(179,209)	(100,701)	(193,766)
Proceeds from disposal of property and equipment	28,388	15,194	38,905	23,697	68,515
Acquisitions, net of cash acquired	(10,976)	(157)	(47,571)	(76,419)	(70,920)
(Purchase) sale of short-term investments, net	(32,891)	3,171	3,491	(3,492)
Other investing activities	1,303	817	2,726	828	(488)
Net cash used in investing activities	(2,177,745)	(2,336,023)	(943,568)	(1,208,059)	(1,799,762)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	3,028,591	681,370	2,635,713	1,200,896	22,565
Payment of long-term debt	(3,631,472)	(756,964)	(2,954,233)	(1,149,876)	(860,515)
Short-term borrowings:
Proceeds	285,803	274,730	490,490	364,065	396,679
Payments	(489,217)	(281,009)	(970,949)	(351,773)	(374,333)
Proceeds (payments) under the revolving lines of credit, net	728,855	1,423,403	1,026,070	(1,126,099)	198,761
Distributions to noncontrolling interest	(10,500)	(7,630)	(18,200)	(15,050)	(24,150)
Proceeds from employee stock purchase plan	1,716	1,222	3,208	2,400
Loan with Hertz Global Holdings, Inc.	182	(5,607)	(6,173)	(7,186)	6,273
Dividends paid	(12,450)	(12,500)	(23,000)
Payment of financing costs	(81,392)	(24,972)	(78,151)	(45,017)	(61,223)
Net cash provided by (used in) financing activities	(179,884)	1,292,043	104,517	(137,523)	(695,943)
Effect of foreign exchange rate changes on cash and cash equivalents	31,602	(75,836)	(10,337)	35,192	(76,540)
Net change in cash and cash equivalents during the period	(1,626,426)	(88,685)	1,388,539	391,470	(135,696)
Cash and cash equivalents at beginning of period	2,374,006	985,467	985,467	593,997	729,693
Cash and cash equivalents at end of period	747,580	896,782	2,374,006	985,467	593,997
Cash paid during the period for:
Interest (net of amounts capitalized)	330,930	252,129	508,183	622,615	764,539
Income taxes	25,338	30,694	50,688	31,321	33,408
Supplemental disclosures of non-cash flow information:
Purchases of revenue earning equipment included in accounts payable and accrued liabilities	628,695	828,881	266,354	141,039	347,581
Sales of revenue earning equipment included in receivables	263,954	530,856	504,217	537,862	1,025,832
Purchases of property and equipment included in accounts payable	59,633	29,125	37,379	38,210	19,490
Sales of property and equipment included in receivables	$ 14,356	$ 5,259	$ 11,071	$ 5,229	$ 2,452

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The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities and the net change during the reporting period in the value of this group of assets within the working capital section.

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Future cash outflow to pay for purchases of revenue earning equipment that have occurred.

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Future cash inflow resulting from the sale of property and equipment.

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Future cash inflow resulting from the sale of revenue earning equipment.

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The component of interest income or expense representing the periodic increase in or charge against earnings to reflect amortization of debt discounts and premiums over the life of the related debt instruments, which are liabilities of the entity.

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The component of interest expense comprised of the periodic charge against earnings over the life of the financing arrangement to which such costs relate.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.

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The net change between the beginning and ending balance of cash and cash equivalents.

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The expense recognized in the current period that allocates the cost of a tangible asset used in providing revenue generating services over the asset's useful life.

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The component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.

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The effect of exchange rate changes on cash balances held in foreign currencies.

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The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

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The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The net change during the reporting period in the aggregate amount of obligations due within one year (or one business cycle). This may include trade payables, amounts due to related parties, royalties payable, and other obligations.

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The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The net change during the period in the amount of cash payments due to taxing authorities for taxes that are based on the reporting entity's earnings.

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The net change during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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The net change in obligations owed to an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.

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The net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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The amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.

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Net increase or decrease in the carrying amount of the debt instrument for the period.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the entity's earnings to the shareholders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 18

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 20
-Subparagraph a

+ Details

Name:	us-gaap_PaymentsOfDividends
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 18, 19, 20

+ Details

Name:	us-gaap_PaymentsOfFinancingCosts
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15, 17

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 17
-Subparagraph c

+ Details

Name:	us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to return capital to noncontrolled interest, which generally occurs when noncontrolling shareholders reduce their ownership stake (in a subsidiary of the entity). This element does not include dividends paid to noncontrolling shareholders.

+ References

+ Details

Name:	us-gaap_PaymentsToMinorityShareholders
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards other than stock option exercises.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph i

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from sale of other property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

+ References

+ Details

Name:	us-gaap_ProceedsFromSaleOfOtherPropertyPlantAndEquipment
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

+ References

+ Details

Name:	us-gaap_ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)

+ Details

Name:	us-gaap_ProfitLoss
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 5
-Article 5

+ Details

Name:	us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from a repayment of a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

+ References

+ Details

Name:	us-gaap_RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increases (decreases) in the market value of derivative instruments, including options, swaps, futures, and forward contracts, which were included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

+ Details

Name:	us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration