Commitments And Contingencies (Narrative) (Detail) (USD $)	1 Months Ended		3 Months Ended
	Jun. 30, 2010	Oct. 31, 2009	Mar. 31, 2013
Schedule Of Commitments And Contingencies [Line Items]
Percentage of payment on defaulting party's obligation on assumed liabilities			50.00%
Claims paid on breach of contract	$ 3,000,000	$ 16,000,000
Lawsuit, filed year		2003
Purchase obligation over the next twelve months			4,400,000,000
Aggregate purchase obligations			136,000,000
Realogy [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of assumption of contingent and other corporate liabilities			62.50%
Percentage of proceeds from contingent corporate assets, entitled to receive			62.50%
Receivables due from former subsidiaries			64,000,000
Wyndham [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of assumption of contingent and other corporate liabilities			37.50%
Percentage of proceeds from contingent corporate assets, entitled to receive			37.50%
Receivables due from former subsidiaries			39,000,000
Realogy, Wyndham And Travelport [Member] | Real Estate Leases [Member]
Schedule Of Commitments And Contingencies [Line Items]
Maximum potential amount of future payments under guarantees			79,000,000
Liability recorded in connection with guarantees			$ 2,000,000