Business Segments - Segment Revenue (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 399	$ 370
Cost reimbursements	34	29
Charges for billing and collection services	10	8
Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	371	347
Operating segments \| Real estate sales and financing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	283	266
Operating segments \| Resort operations and club management
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	88	81
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
Cost reimbursements	34	29
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	(6)	(6)
Charges for billing and collection services		1
Charges for discounts on property stays	6	5
Rental expense for model units	$ 1	$ 1

Expense for the rental of model units to show prospective buyers.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Cost associated with reimbursable income. This occurs when a services entity incurs expenses on behalf of the client and passes through the cost of reimbursable expenses to a client.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

The aggregate costs incurred during the reporting period related to financial services rendered by an entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 605
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=68080496&loc=d3e51325-107943

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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