Fair Value Measurements - Fair Value of Debt and Hierarchy Level Used to Estimate Fair Values (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Carrying amount [Member] | Level 3 [Member] | SF CMBS Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	$ 725	$ 725
Carrying amount [Member] | Level 3 [Member] | HHV CMBS Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	1,275	1,275
Carrying amount [Member] | Level 3 [Member] | 2016 Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan		700
Carrying amount [Member] | Level 3 [Member] | 2019 Term Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	670	670
Carrying amount [Member] | Level 3 [Member] | Revolver [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	601
Carrying amount [Member] | Level 3 [Member] | Mortgage Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	511	516
Carrying amount [Member] | Level 1 [Member] | 2025 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	651
Carrying amount [Member] | Level 1 [Member] | 2028 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	725
Fair Value [Member] | Level 3 [Member] | SF CMBS Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	707	740
Fair Value [Member] | Level 3 [Member] | HHV CMBS Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	1,192	1,316
Fair Value [Member] | Level 3 [Member] | 2016 Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan		698
Fair Value [Member] | Level 3 [Member] | 2019 Term Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	648	667
Fair Value [Member] | Level 3 [Member] | Revolver [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	591
Fair Value [Member] | Level 3 [Member] | Mortgage Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	480	$ 516
Fair Value [Member] | Level 1 [Member] | 2025 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	694
Fair Value [Member] | Level 1 [Member] | 2028 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	$ 725