Goodwill And Intangible Assets, Net (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 22,000,000	$ 23,000,000	$ 24,000,000
Leisure [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated goodwill impairment losses	$ 2,500,000,000	$ 2,500,000,000