Franchising And Marketing/Reservation Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Franchisor Disclosure [Line Items]
Franchise Fee Revenues	$ 599	$ 583	$ 522
Initial Franchise Fees	12	12	10
Marketing And Reservation Fees	291	282	237
Development Advances	97	41
Development Advances Forgiveness Amount	7	4	5
Bad Debt Expense On Development Advances (Less than $1 Million for 2013)	1	2	1
Restructuring	10	7	6
Minimum [Member]
Franchisor Disclosure [Line Items]
Franchise/Management Agreement Expiration Period	10 years
Maximum [Member]
Franchisor Disclosure [Line Items]
Franchise/Management Agreement Expiration Period	20 years
Investments Impairment Charge [Member]
Franchisor Disclosure [Line Items]
Restructuring			$ 14