CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 398.0	$ 304.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of revenue earning equipment	1,847.1	1,531.8
Depreciation of property and equipment	149.7	126.9
Amortization of other intangible assets	90.9	58.9
Amortization and write-off of deferred financing costs	40.9	41.7
Amortization and write-off of debt discount	(4.7)	4.1
Stock-based compensation charges	32.5	22.3
(Gain) loss on derivatives	(3.7)	0.7
(Gain) loss on disposal of business	1.8	(8.7)
Loss on revaluation of foreign denominated debt	0	2.5
Provision for losses on doubtful accounts	38.4	23.5
Deferred taxes on income	192.2	118.7
Impairment charges	40.0	0
Gain on sale of property and equipment	(2.6)	(1.9)
Changes in assets and liabilities, net of effects of acquisition:
Receivables	(165.1)	(248.1)
Inventories, prepaid expenses and other assets	(26.4)	(4.9)
Accounts payable	92.4	98.8
Accrued liabilities	100.7	10.5
Accrued taxes	52.4	66.1
Public liability and property damage	(2.0)	(3.2)
Net cash provided by operating activities	2,872.5	2,143.7
Cash flows from investing activities:
Net change in restricted cash and cash equivalents	50.0	(69.3)
Revenue earning equipment expenditures	(9,341.0)	(7,705.9)
Proceeds from disposal of revenue earning equipment	5,669.2	4,838.9
Property and equipment expenditures	(246.4)	(221.6)
Proceeds from disposal of property and equipment	62.3	86.8
Acquisitions, net of cash acquired	(226.9)	(196.2)
Proceeds from disposal of business	0	11.7
Other investing activities	(2.8)	(1.4)
Net cash used in investing activities	(4,035.6)	(3,257.0)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,207.5	282.4
Payment of long-term debt	(371.2)	(656.1)
Short-term borrowings:
Proceeds	472.4	368.0
Payments	(710.9)	(962.7)
Proceeds under the revolving lines of credit	5,250.3	4,505.4
Payments under the revolving lines of credit	(4,167.5)	(2,829.4)
Purchase of noncontrolling interest	0	(38.0)
Proceeds from employee stock purchase plan	3.8	3.2
Loan with Hertz Global Holdings, Inc.	1.5	(12.3)
Payment of financing costs	(27.3)	(13.7)
Dividends paid	(479.7)	(12.5)
Net cash provided by financing activities	1,178.9	634.3
Effect of foreign exchange rate changes on cash and cash equivalents	(1.7)	1.1
Net increase (decrease) in cash and cash equivalents during the period	14.1	(477.9)
Cash and cash equivalents at beginning of period	533.2	931.2
Cash and cash equivalents at end of period	547.3	453.3
Cash paid during the period for:
Interest (net of amounts capitalized)	428.9	383.2
Income taxes	56.4	43.0
Supplemental dislcosure fo non-cash flow information [Abstract]
Purchases of revenue earning equipment included in accounts payable and accrued liabilities	184.2	289.8
Sales of revenue earning equipment included in receivables	391.0	504.9
Purchases of property and equipment included in accounts payable	39.5	38.0
Sales of property and equipment included in receivables	2.5	22.3
Consideration for acquisitions and divestitures	22.9	0
Capital Lease Obligations Incurred	$ 19.5	$ 23.1