Business acquisition, purchase price allocation, vehicles, net.

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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-Publisher FASB

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash.

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit.

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Acquisitions (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended	12 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 ACE Rent A Car [Member]	Sep. 30, 2014 Edmonton [Member]	Sep. 30, 2014 Edmonton [Member]	Sep. 30, 2014 Customer Relationships [Member]	Sep. 30, 2014 License Agreement Terms [Member]	Sep. 30, 2014 Portugal [Member]	Jun. 30, 2014 Portugal [Member]	Sep. 30, 2014 Portugal [Member]	Jul. 31, 2013 Payless [Member]	Sep. 30, 2014 Payless [Member]	Mar. 31, 2013 Zipcar [Member]	Dec. 31, 2013 Zipcar [Member]	Sep. 30, 2014 Apex [Member]	Dec. 31, 2012 Apex [Member]	Aug. 31, 2013 Brazil [Member]	Sep. 30, 2014 Brazil [Member]	Dec. 31, 2013 Brazil [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Date of acquisition			Aug. 01, 2014		Feb. 01, 2014			Feb. 01, 2014				Jul. 01, 2013		Mar. 14, 2013					Aug. 12, 2013
Business Combination, Consideration Transferred			$ 6		$ 33					$ 12	$ 46		$ 473
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability															7
Business Acquisition Purchase Price Allocation Vehicles Net			14	84	84
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	17					10	7		2
Goodwill	683	691	6	11	11				13
Other intangibles, useful life, in years	12 years 0 months 0 days			4 years 0 months 0 days					2 years 0 months 0 days
Indefinite-Lived License Agreements				3	3
Business Combination, Consideration Transferred, Other									15
Equity Method Investment, Ownership Percentage																			50.00%
Payments to Acquire Equity Method Investments																	53	6
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High																26
Business Combination, Contingent Consideration, Liability															$ 19