Restructuring and Other Special Charges (Credits),Net - Summary of Restructuring Related Accruals (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Beginning balance		$ 15
Expenses/ Reversals	$ 3	17
Payments		(15)
Non-Cash Other		(4)
Ending balance	13	13
Severance costs related to cost savings initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Expenses/ Reversals		17
Payments		(13)
Ending balance	4	4
Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Expenses/ Reversals		4
Non-Cash Other		(4)
Vacation ownership exit cost from ceased projects [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		14
Expenses/ Reversals		(8)
Non-Cash Other		(1)
Ending balance	5	5
Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		1
Expenses/ Reversals		4
Payments		(2)
Non-Cash Other		1
Ending balance	$ 4	$ 4