Debt & Non-recourse debt - Schedule of Outstanding Borrowings (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt, gross	$ 498	$ 500
Less: unamortized deferred financing costs and discount	(10)	(10)
Long-term debt	$ 488	$ 490
Debt instrument, average interest rate	4.977%	4.851%
Line of Credit | Term loans with an average rate of 2.94%, due 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 198	$ 200
Less: unamortized deferred financing costs and discount	$ (2)	$ (8)
Debt instrument, average interest rate	3.23%	3.23%
Senior Notes | Senior notes with a rate of 6.125%, due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 300	$ 300
Debt instrument, stated interest rate	6.125%	6.125%
Non-recourse Debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 702	$ 696
Less: unamortized deferred financing costs and discount	(7)	(2)
Long-term debt	$ 695	$ 694
Debt instrument, average interest rate	2.366%	1.946%
Non-recourse Debt | Timeshare Facility with an average rate of 2.12%, due 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 128	$ 450
Less: unamortized deferred financing costs and discount	$ (3)	$ (3)
Debt instrument, average interest rate	2.12%	2.12%
Non-recourse Debt | Securitized Debt with an average rate of 2.42%, due 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 574	$ 246
Less: unamortized deferred financing costs and discount	$ (7)	$ (2)
Debt instrument, average interest rate	2.42%	2.42%
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount	$ (2)	$ (2)