Revenue from Contracts with Customers - Schedule of Impact of New Revenue Guidance on Condensed Consolidated Statement of Operations (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenues		$ 427,000,000	$ 426,000,000	$ 1,357,000,000	$ 1,264,000,000
Expenses
General and administrative		31,000,000	23,000,000	84,000,000	75,000,000
Depreciation and amortization		9,000,000	7,000,000	25,000,000	21,000,000
Total operating expenses		364,000,000	350,000,000	1,092,000,000	1,014,000,000
Interest expense		(7,000,000)	(7,000,000)	(22,000,000)	(21,000,000)
Equity in earnings from unconsolidated affiliates		1,000,000	1,000,000		1,000,000
Other loss		(1,000,000)		(1,000,000)
Income before income taxes		56,000,000	71,000,000	242,000,000	231,000,000
Income tax expense		(15,000,000)	(28,000,000)	(64,000,000)	(87,000,000)
Net income	[1]	$ 40,533,279	$ 42,700,978	$ 177,564,538	$ 143,742,500
Earnings per share:
Basic		$ 0.42	$ 0.43	$ 1.82	$ 1.45
Diluted		$ 0.42	$ 0.43	$ 1.81	$ 1.44
Sales of VOIs, Net
Revenues
Total revenues		$ 99,000,000	$ 145,000,000	$ 427,000,000	$ 406,000,000
Sales, Marketing, Brand and Other Fees
Revenues
Total revenues		152,000,000	127,000,000	423,000,000	401,000,000
Financing
Revenues
Total revenues		40,000,000	38,000,000	117,000,000	109,000,000
Expenses
Expenses		12,000,000	11,000,000	35,000,000	32,000,000
Resort and Club Management
Revenues
Total revenues		40,000,000	37,000,000	116,000,000	108,000,000
Expenses
Expenses		11,000,000	12,000,000	33,000,000	32,000,000
Rental And Ancillary Services
Revenues
Total revenues		60,000,000		164,000,000
Expenses
Expenses		37,000,000		95,000,000
Cost Reimbursements
Revenues
Total revenues		36,000,000	34,000,000	110,000,000	102,000,000
Expenses
Expenses		36,000,000	34,000,000	110,000,000	102,000,000
Cost of VOI Sales
Expenses
Expenses		29,000,000	40,000,000	109,000,000	107,000,000
Sales and Marketing
Expenses
Expenses		174,000,000	171,000,000	528,000,000	492,000,000
License Fee Expense
Expenses
Expenses		25,000,000	$ 22,000,000	73,000,000	$ 65,000,000
Topic 606 | Impact of Adopting ASC 606
Revenues
Total revenues		56,000,000		34,000,000
Expenses
General and administrative		0		0
Depreciation and amortization		0		0
Total operating expenses		29,000,000		30,000,000
Interest expense		0		0
Equity in earnings from unconsolidated affiliates		0
Other loss		0		0
Income before income taxes		27,000,000		4,000,000
Income tax expense		(6,000,000)		(1,000,000)
Net income		$ 21,000,000		$ 3,000,000
Earnings per share:
Basic		$ 0.21		$ 0.03
Diluted		$ 0.21		$ 0.03
Topic 606 | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		$ 483,000,000		$ 1,391,000,000
Expenses
General and administrative		31,000,000		84,000,000
Depreciation and amortization		9,000,000		25,000,000
Total operating expenses		393,000,000		1,122,000,000
Interest expense		(7,000,000)		(22,000,000)
Equity in earnings from unconsolidated affiliates		1,000,000
Other loss		(1,000,000)		(1,000,000)
Income before income taxes		83,000,000		246,000,000
Income tax expense		(21,000,000)		(65,000,000)
Net income		$ 62,000,000		$ 181,000,000
Earnings per share:
Basic		$ 0.63		$ 1.85
Diluted		$ 0.63		$ 1.84
Topic 606 | Sales of VOIs, Net | Impact of Adopting ASC 606
Revenues
Total revenues		$ 58,000,000		$ 30,000,000
Topic 606 | Sales of VOIs, Net | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		157,000,000		457,000,000
Topic 606 | Sales, Marketing, Brand and Other Fees | Impact of Adopting ASC 606
Revenues
Total revenues		(2,000,000)		4,000,000
Topic 606 | Sales, Marketing, Brand and Other Fees | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		150,000,000		427,000,000
Topic 606 | Financing | Impact of Adopting ASC 606
Revenues
Total revenues		0		0
Expenses
Expenses		0		0
Topic 606 | Financing | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		40,000,000		117,000,000
Expenses
Expenses		12,000,000		35,000,000
Topic 606 | Resort and Club Management | Impact of Adopting ASC 606
Revenues
Total revenues		0		0
Expenses
Expenses		0		0
Topic 606 | Resort and Club Management | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		40,000,000		116,000,000
Expenses
Expenses		11,000,000		33,000,000
Topic 606 | Rental And Ancillary Services | Impact of Adopting ASC 606
Revenues
Total revenues		0		0
Expenses
Expenses		0		0
Topic 606 | Rental And Ancillary Services | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		60,000,000		164,000,000
Expenses
Expenses		37,000,000		95,000,000
Topic 606 | Cost Reimbursements | Impact of Adopting ASC 606
Revenues
Total revenues		0		0
Expenses
Expenses		0		0
Topic 606 | Cost Reimbursements | Calculated under Revenue Guidance in Effect before Topic 606
Revenues
Total revenues		36,000,000		110,000,000
Expenses
Expenses		36,000,000		110,000,000
Topic 606 | Cost of VOI Sales | Impact of Adopting ASC 606
Expenses
Expenses		18,000,000		16,000,000
Topic 606 | Cost of VOI Sales | Calculated under Revenue Guidance in Effect before Topic 606
Expenses
Expenses		47,000,000		125,000,000
Topic 606 | Sales and Marketing | Impact of Adopting ASC 606
Expenses
Expenses		11,000,000		14,000,000
Topic 606 | Sales and Marketing | Calculated under Revenue Guidance in Effect before Topic 606
Expenses
Expenses		185,000,000		542,000,000
Topic 606 | License Fee Expense | Impact of Adopting ASC 606
Expenses
Expenses		0		0
Topic 606 | License Fee Expense | Calculated under Revenue Guidance in Effect before Topic 606
Expenses
Expenses		$ 25,000,000		$ 73,000,000

[1] Net income for the three months ended September 30, 2018 and 2017 was $40,533,279 and $42,700,978, respectively, and for the nine months ended September 30, 2018 and 2017 was $177,564,538 and $143,742,500, respectively.