Additional Information - Dispositions (Details) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended							3 Months Ended			3 Months Ended						12 Months Ended
	Mar. 31, 2014 hotel	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 28, 2012 USD ($) Entity	Dec. 28, 2012 North American Limited Service Joint Venture USD ($)	Dec. 28, 2012 Performance Arrangement North American Limited Service Joint Venture USD ($)	Dec. 28, 2012 Sale of Land to Joint Venture in 2005 North American Limited Service Joint Venture USD ($)	Dec. 31, 2013 London EDITION Hotel USD ($)	Dec. 31, 2014 Land Parcel Sale to Third Party [Member] USD ($)	Dec. 31, 2013 Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets USD ($)	Dec. 31, 2013 Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets EUR (€)	Mar. 31, 2014 International Segment London EDITION Hotel USD ($)	Mar. 31, 2014 International Segment Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets USD ($)	Mar. 31, 2014 International Segment Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets EUR (€)	Dec. 31, 2014 North American Full-Service Segment Miami Beach EDITION Hotels USD ($)	Mar. 31, 2014 North American Full-Service Segment Miami Beach EDITION Hotels USD ($)	Jun. 30, 2015 Scenario, Forecast London EDITION Hotel USD ($)	Dec. 31, 2014 Property and Equipment USD ($)	Dec. 31, 2014 Other Current Liabilities North American Full-Service Segment Miami Beach EDITION Hotels USD ($)
Significant Acquisitions and Disposals [Line Items]
Proceeds from dispositions		$ 435	$ 0	$ 65					$ 42			$ 230			$ 100	$ 230
Number of hotels	3
Assets held-for-sale																	816
Impairment charge																		25
Assets, reclassified													106	77	233
Assets, property, plant and equipment, reclassified															157
Assets held for sale		233	350					244		106	77				17
Liabilities, reclassified			61					13		48	35		48	35	26				14
Cash proceeds from sale of rights to acquire property and attached assets													62	45
Noncash proceeds from sale of rights to acquire property and attached assets													45	33
Number of joint ventures merged before sale				2
Proceeds from sale of interest in joint venture					96	30
Total gain recognized on disposal					41
Deferred gain on sale, amount recognized in current period							20
Gain on sale of interest in joint venture					21
Deferred revenue recognized					$ 7