Acquisitions and Dispositions- Starwood Fair Value and Estimated Useful Lives of Identifiable Intangible Assets (Details) - Starwood Hotels & Resorts Worldwide, Inc. $ in Millions	Sep. 23, 2016 USD ($)
Business Acquisition [Line Items]
Identified intangible assets	$ 8,573
Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	1,394
Franchise Agreements
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	729
Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	50
Brands
Business Acquisition [Line Items]
Estimated fair value, indefinite-lived intangible assets	$ 6,400
Minimum | Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	20 years
Minimum | Franchise Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	20 years
Minimum | Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated Useful Life (in years)	25 years
Maximum | Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	30 years
Maximum | Franchise Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	80 years
Maximum | Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated Useful Life (in years)	30 years