Timeshare Financing Receivables - Financing Receivable by FICO Score (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Timeshare financing receivables	$ 1,280	$ 1,292
More than 700
Financing Receivable, Recorded Investment [Line Items]
Timeshare financing receivables	837	843
600-699
Financing Receivable, Recorded Investment [Line Items]
Timeshare financing receivables	232	237
Less than 600
Financing Receivable, Recorded Investment [Line Items]
Timeshare financing receivables	27	27
No score
Financing Receivable, Recorded Investment [Line Items]
Timeshare financing receivables	$ 184	$ 185

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(3))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant