Other Assets - Schedule of Other Assets (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts Notes And Loans Receivable [Line Items]
Allowance for notes receivable	$ 103	$ 121	$ 136	$ 161
VOI [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for notes receivable	$ 52	$ 39