Segment Reporting (Details) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Financial information of business segments
Revenue from external customers	$ 1,513,344	$ 1,286,123	$ 2,938,720	$ 2,506,061
Revenue	1,513,344	1,286,123	2,938,720	2,506,061
Segment NBT	87,967	62,074	141,087	93,448
Unallocated CSS NBT	(11,230)	(9,867)	(19,972)	(18,749)
Restructuring and other charges, net	(1,727)		(2,495)
Unallocated CSS Capital Expenditures	4,339	3,116	8,486	5,616
Earnings from continuing operations before income taxes	75,010	52,207	118,620	74,699
Segment capital expenditures	499,820	341,172	808,891	538,773
Capital expenditures paid	504,159	344,288	817,377	544,389
Segment Reporting (Textuals) [Abstract]
Acquisitions	(264,700)		(348,584)	(2,409)
Fleet Management Solutions [Member]
Financial information of business segments
Revenue from external customers	973,367	853,020	1,862,983	1,662,409
Inter-segment revenue	91,143	78,153	181,643	152,747
Revenue	1,064,510	931,173	2,044,626	1,815,156
Segment NBT	67,504	46,226	106,066	67,921
Segment capital expenditures	484,778	338,797	786,750	534,285
Supply Chain Solutions [Member]
Financial information of business segments
Revenue from external customers	389,578	310,079	790,616	604,286
Revenue	389,578	310,079	790,616	604,286
Segment NBT	17,231	12,559	29,295	19,585
Segment capital expenditures	13,963	1,996	20,103	3,497
Dedicated Contract Carriage [Member]
Financial information of business segments
Revenue from external customers	150,399	123,024	285,121	239,366
Revenue	150,399	123,024	285,121	239,366
Segment NBT	9,761	8,432	17,159	15,818
Segment capital expenditures	1,079	379	2,038	991
Eliminations [Member]
Financial information of business segments
Inter-segment revenue	(91,143)	(78,153)	(181,643)	(152,747)
Revenue	(91,143)	(78,153)	(181,643)	(152,747)
Segment NBT	$ (6,529)	$ (5,143)	$ (11,433)	$ (9,876)

Total expenditures paid for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets. Amounts include capital expenditures not attributable to any reportable segment which remain unallocated. Excludes acquisition payments and revenue earning equipment acquired under capital leases.

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Restructuring and Other Charges, net and other items not representative of the ongoing operations of the segments.

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Amount of profit or loss before tax recognized for segment reporting purposes. Includes an allocation of Central Support Services (CSS), excludes restructuring and other charges, net and excludes other items not representative of the ongoing operations of the segments.

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Total expenditures paid for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets. Excludes acquisition payments and revenue earning equipment acquired under capital leases.

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Segment reporting.

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Capital expenditures not attributable to any reportable segment which remain unallocated.

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Costs not attributable to any reportable segment which remain unallocated. This includes the costs for investor relations, public affairs and certain executive compensation.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph h
-Subparagraph 1(i)

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15, 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB
-Name Accounting Standards Codification
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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 27
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of revenue from transactions with other operating segments of the same entity.

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