Vacation Ownership Notes Receivable - Balances of VOI Notes Receivable by Brand and by FICO Score (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 719	$ 735
Sheraton [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	355	358
Westin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	340	349
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	24	28
700+ [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	368	377
700+ [Member] | Sheraton [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	153	153
700+ [Member] | Westin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	202	208
700+ [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	13	16
600-699 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	219	218
600-699 [Member] | Sheraton [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	125	123
600-699 [Member] | Westin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	91	91
600-699 [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	3	4
Less than 600 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	28	31
Less than 600 [Member] | Sheraton [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	20	23
Less than 600 [Member] | Westin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	8	8
Less than 600 [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables
No Score [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	104	109
No Score [Member] | Sheraton [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	57	59
No Score [Member] | Westin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	39	42
No Score [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 8	$ 8