Guarantees and Contingent Liabilities - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Guarantees And Contingent Liabilities (Textual) [Abstract]
Liability related to remaining Visa Litigation, carrying amount	$ 24,000,000
Representation and warranty reserve	75,000,000	83,000,000	233,000,000	240,000,000
Loss contingency range of possible loss maximum	200,000,000
Merchant processing [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Value of airline tickets purchased to deliver at future date	8,600,000,000
Company held collateral in escrow deposits, letters of credit and indemnities from financial institutions and liens on various assets	690,000,000
Asset sales [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Representation and warranty reserve	75,000,000	83,000,000
Unresolved representation and warranty claims	$ 44,000,000	$ 89,000,000