Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Restructuring Reserve [Roll Forward]
March 31, 2014	$ 22
Restructuring expense	7	[1]	10	[2]
Cash payment/utilization	(12)
Balance as of March 31, 2014	17
North America
Restructuring Reserve [Roll Forward]
March 31, 2014	1
Restructuring expense	1
Cash payment/utilization	(1)
Balance as of March 31, 2014	1
International
Restructuring Reserve [Roll Forward]
March 31, 2014	21
Restructuring expense	6
Cash payment/utilization	(11)
Balance as of March 31, 2014	16
Personnel Related
Restructuring Reserve [Roll Forward]
March 31, 2014	17
Restructuring expense	7
Cash payment/utilization	(12)
Balance as of March 31, 2014	12
Facility Related
Restructuring Reserve [Roll Forward]
March 31, 2014	5
Restructuring expense	0
Cash payment/utilization	0
Balance as of March 31, 2014	$ 5

[1] (d) During the three months ended March 31, 2014, transaction-related costs primarily comprised of a non-cash charge for re-acquired license rights and acquisition integration expenses. During the three months ended March 31, 2013, transaction-related costs primarily related to the integration of Avis Europe and the acquisition of Zipcar.

[2] (c) Includes unallocated corporate overhead which is not attributable to a particular segment.