Acquisitions and Dispositions - Dispositions (Details) In Millions, unless otherwise specified	6 Months Ended					18 Months Ended	6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 International Segment Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets USD ($)	Jun. 30, 2014 International Segment Right to Acquire Landlord's Interest in Real Estate Property and Attached Assets EUR (€)	Jun. 30, 2014 Other unallocated corporate London EDITION Hotel USD ($)	Jun. 30, 2015 Other unallocated corporate Forecast EDITION Hotels USD ($) hotel	Jun. 30, 2014 Other unallocated corporate Depreciation and Amortization EDITION Hotels USD ($)
Significant Acquisitions and Disposals [Line Items]
Proceeds from sale of property	$ 292	$ 0			$ 230
Number of hotels						3
Expected proceeds from sale of property						816
Impairment of long-lived assets							25
Reallocation of impairment costs							15
Assets, sold			106	77
Liabilities, sold			48	35
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